Cloud Technology and Services — page 3
Which AWS service provides a MANAGED HADOOP AND SPARK CLUSTER platform that can auto-scale, run on Spot Instances, and integrates with S3 as a data lake?
A company needs to provide a MANAGED FILE SYSTEM accessible to multiple Windows EC2 instances simultaneously using SMB protocol. Which AWS service provides this?
Which of the following CORRECTLY describes AMAZON ROUTE 53 "WEIGHTED ROUTING"?
A company uses AMAZON RDS MULTI-AZ. Their primary database instance fails unexpectedly. What happens?
A company wants to use AWS to HOST A MACHINE LEARNING MODEL FOR REAL-TIME INFERENCE — where their mobile app sends data and receives predictions within 100ms. Which SageMaker feature enables this?
Which of the following AWS SERVICES acts as a CONNECTOR between ON-PREMISES NFS/SMB FILE SERVERS and AMAZON S3 — allowing on-premises applications to store files in S3 while accessing them as a local file share?
A company uses AMAZON VPC and wants to ensure that EC2 instances in PRIVATE SUBNETS can be PATCHED (downloading updates from the internet) without assigning them public IP addresses. What component is required?
A company uses AMAZON CLOUDFRONT for their website. Users report that content updates are not immediately visible after deployment — they still see old cached content. What is the CORRECT solution?
Which of the following is TRUE about AMAZON EKS (Elastic Kubernetes Service)?
A company wants to USE MACHINE LEARNING TO IDENTIFY OBJECTS AND SCENES in images without training any ML models. Which AWS service provides pre-trained image analysis capabilities?
Which of the following CORRECTLY describes AWS SAVINGS PLANS eligibility?
What is the MINIMUM COMMITMENT PERIOD for AWS SAVINGS PLANS?
What is the key FINANCIAL BENEFIT of using AMAZON AURORA SERVERLESS v2 compared to a STANDARD AURORA PROVISIONED CLUSTER for a DEVELOPMENT/TEST DATABASE that is only used during business hours?
A company deploys a WEB APPLICATION on AWS. The architecture is: Route 53 → CloudFront → Application Load Balancer → EC2 (Auto Scaling) → RDS Multi-AZ. A complete AZ failure occurs. Which components continue to function normally?
A company wants to TEST THEIR DISASTER RECOVERY PLAN without affecting production. They want to SIMULATE an AZ failure and verify that their application fails over correctly. Which AWS best practice principle applies?
Which of the following scenarios MOST benefits from using AWS LAMBDA instead of Amazon EC2?
A company wants to build a MACHINE LEARNING PIPELINE that: (1) Preprocesses training data in S3, (2) Trains a model, (3) Evaluates model accuracy, (4) Deploys the model if accuracy > 90%. Which SageMaker feature orchestrates this multi-step ML workflow?
A company asks: "We use Amazon EC2. If an EC2 instance becomes UNHEALTHY, how does AWS AUTOMATICALLY REPLACE IT?" What is the CORRECT mechanism?
Which Amazon CLOUDWATCH feature enables you to create OPERATIONAL DASHBOARDS that display metrics from multiple AWS services in real time and can be shared with team members?
Which of the following BEST describes when to use AMAZON SNS vs AMAZON SQS for application integration?
A company uses AWS BATCH for large-scale genomics computing. They want to MINIMIZE COST while accepting the possibility of job interruption. Which AWS BATCH configuration achieves the lowest cost?
Which of the following is the MOST ACCURATE description of AMAZON LIGHTSAIL's positioning in the AWS product lineup?
A company wants to DEPLOY THEIR APPLICATION CODE to EC2 INSTANCES across a deployment group automatically — supporting rolling updates, blue/green deployments, and automatic rollback on failure. Which AWS service manages this?
Which AWS service is specifically designed to help MOBILE APP DEVELOPERS build, test, and iterate on iOS and Android apps — providing real device testing at scale?
A company has DEPLOYED AN APPLICATION using AWS CDK (Cloud Development Kit). What does CDK ultimately generate that AWS uses to provision resources?
What is the key difference between AMAZON KINESIS DATA STREAMS and AMAZON SQS for stream processing?
A company uses AWS CLOUDFORMATION. They want to PREVENT CERTAIN RESOURCES in a stack from being ACCIDENTALLY UPDATED OR DELETED during a stack update. Which CloudFormation feature enables this?
Which AWS SERVICE provides a FULLY MANAGED ENVIRONMENT for building, testing, and deploying MOBILE AND WEB APPLICATIONS with built-in CI/CD, hosting, and backend services?
What is the purpose of AMAZON KINESIS DATA FIREHOSE (now Amazon Data Firehose)?
A company needs to run a LEGACY APPLICATION that requires a SPECIFIC OS VERSION and cannot be containerized. They need full control over the OS configuration. Which AWS compute option is MOST appropriate?
A startup CTO argues: "We should build our own data center to have full control and avoid cloud vendor lock-in." Which response MOST accurately addresses the lock-in concern?
Which of the following is the MOST ACCURATE statement about AWS's "shared fate" model for infrastructure?
Which of the following is the BEST description of "AWS Managed Services" (AMS) and when a company should consider it?
What does the term "cloud-native" mean in the context of AWS application architecture?
What is the maximum storage capacity of a single Amazon EBS `gp3` volume?
A company runs a global mobile application with users in 50 countries. They want DNS resolution to be fast and queries to be answered from infrastructure close to the user. Which AWS service optimizes this?
Which Amazon EC2 AUTO SCALING policy is MOST appropriate for a workload that needs capacity available BEFORE a scheduled product launch at a known time?
A company uses AWS Lambda with an SQS trigger. They notice that failed messages are processed repeatedly because Lambda keeps failing on them. What configuration PREVENTS a single bad message from blocking the queue indefinitely?
A company's application makes thousands of small database queries per second. The database becomes a bottleneck. Which AWS service provides IN-MEMORY CACHING specifically designed for reducing read load on relational databases?
What is the purpose of AMAZON EVENTBRIDGE SCHEMA REGISTRY?
A company uses Amazon SQS. After a message is received by a consumer, how long does the consumer have to DELETE the message before it becomes visible again to other consumers? (Default value)
Which of the following CORRECTLY describes how AMAZON S3 HANDLES CONCURRENT WRITES to the SAME OBJECT?
A company stores all their AWS infrastructure definitions in AWS CloudFormation templates stored in a CODECOMMIT REPOSITORY. They want changes to the repository to AUTOMATICALLY DEPLOY TO AWS. Which service orchestrates this?
Which Amazon CloudFront feature allows you to serve DIFFERENT CONTENT to users based on their DEVICE TYPE (mobile vs. desktop) using Lambda@Edge?
What is the MAXIMUM MESSAGE SIZE for Amazon SQS?
Which of the following is the PRIMARY ADVANTAGE of using AMAZON AURORA over Amazon RDS for a high-read, high-write production workload?
What is AMAZON TRANSCRIBE MEDICAL compared to standard AMAZON TRANSCRIBE?
Which AWS service provides a FULLY MANAGED BLOCKCHAIN NETWORK using the Hyperledger Fabric framework?
What is the purpose of AWS STEP FUNCTIONS' "EXPRESS WORKFLOWS" compared to "STANDARD WORKFLOWS"?
Which AWS service provides CONTINUOUS PROFILING of production applications to identify the most expensive code paths (CPU, memory, I/O) in your applications?
A company uses AMAZON API GATEWAY with Lambda. The API is receiving high traffic and Lambda concurrency is being hit. What is the BEST way to PROTECT the Lambda function from being overwhelmed?
What is AMAZON REKOGNITION CUSTOM LABELS?
A company's architecture review identifies that their application stores TEMPORARY FILES in Lambda's `/tmp` directory. Which limitation should they be aware of?
Which AWS service provides a MANAGED GRAPH DATABASE that can process BILLIONS OF RELATIONSHIPS with millisecond query performance?
A company uses Amazon RDS and has the `db.r5.4xlarge` instance running 24/7. They want to SAVE MONEY without changing instance type or performance. What is the BEST option?
What is the AWS "PRICE LIST API" and when would a developer use it?
A company's AWS bill shows SIGNIFICANT DATA TRANSFER COSTS. Which of the following would REDUCE these costs?
How does AWS determine pricing for data transfer FROM EC2 TO S3 in the SAME REGION?
A company has a STATEFUL application that stores session data in memory on EC2 instances. When Auto Scaling terminates an instance during scale-in, users lose their sessions. What is the RECOMMENDED ARCHITECTURAL FIX?
Which combination of AWS services would you use to BUILD A SERVERLESS DATA PIPELINE that ingests data in real time, transforms it, and loads it into a data warehouse?
A company wants to ensure their S3 bucket POLICY and ACL are EVALUATED CORRECTLY. Which statement describes the evaluation order for S3 access?
Which AWS service provides a MANAGED GRAPH DATABASE that supports the PROPERTY GRAPH model (Gremlin/Apache TinkerPop) AND the RDF model (SPARQL)?
A company runs an application that calls a THIRD-PARTY PAYMENT API. The third-party API requires a static IP address to whitelist. The application runs on Lambda (which has no static IP). What is the CORRECT solution?
What is the DIFFERENCE between Amazon CloudWatch LOGS and Amazon CloudWatch METRICS STREAMS?
A company wants to REDUCE THE COST of using AWS GLUE ETL jobs that run frequently but process the same data repeatedly. Which Glue feature helps?
A company is deploying microservices on AMAZON EKS. They need a LOAD BALANCER that automatically provisions an AWS Application Load Balancer for each Kubernetes Ingress resource. Which controller manages this?
A company runs AWS workloads and wants to understand AWS's CARBON NEUTRALITY COMMITMENT. Which statement is CORRECT?
A company uses AMAZON RDS AURORA and wants to test a MAJOR VERSION UPGRADE before applying it to production. Which Aurora feature enables this with MINIMAL RISK?
Which of the following BEST describes the difference between AMAZON ECS and AMAZON EKS?
What is the purpose of AWS GROUND STATION?
A company uses AMAZON CLOUDFRONT with an S3 origin. They want to PREVENT DIRECT S3 ACCESS — users should only be able to access content through CloudFront. Which CloudFront feature enables this?
Which AWS service enables REAL-TIME BIDIRECTIONAL SYNC between on-premises FILE SERVERS and AMAZON S3, allowing on-premises users to access S3 data as if it were a local network file share?
A company needs a DATABASE FOR FRAUD DETECTION that can identify relationships between accounts, transactions, and devices in REAL TIME using graph traversals. Which service is BEST?
A company wants to USE EXISTING SQL SKILLS to query data in DYNAMODB without learning DynamoDB's proprietary API. Which feature enables this?
Which of the following represents a COMPLETE SERVERLESS ARCHITECTURE for a REST API backed by a database?
What is the MAXIMUM NUMBER OF LAMBDA FUNCTIONS that can run SIMULTANEOUSLY in a single AWS account per Region by DEFAULT?
A company uses AMAZON SQS and wants to ensure that messages are NOT PROCESSED DURING BUSINESS HOURS (9 AM–5 PM) but ARE QUEUED for processing overnight. Which SQS feature supports this?
Which of the following is TRUE about AMAZON S3 INTELLIGENT-TIERING?
A company wants to SEND APPLICATION LOGS from AWS Lambda functions to a THIRD-PARTY LOG MANAGEMENT tool (like Splunk or Datadog) in real time. What is the RECOMMENDED architecture?
What is the PRIMARY BENEFIT of using AMAZON AURORA BACKTRACK compared to restoring from a snapshot?
Which of the following is the MOST ACCURATE statement about AMAZON LIGHTSAIL compared to Amazon EC2?
Which of the following is the BEST example of "agility" as a benefit of AWS Cloud?
A company wants to run workloads EXCLUSIVELY on hardware that is not shared with any other AWS customer. Which EC2 option provides this?
Which of the following BEST describes "fault tolerance" in cloud architecture?
Which load balancer type operates at Layer 7 and supports content-based routing (e.g., routing `/api/*` to one target group and `/web/*` to another)?
A company needs to run a stateful application that requires persistent block storage and consistent I/O performance. Which storage service is MOST appropriate?
Which Amazon EC2 Auto Scaling policy adjusts capacity based on a SPECIFIC metric, such as keeping average CPU utilization at 60%?
Which AWS service provides a MANAGED Apache Kafka service for real-time data streaming?
A company wants to store objects in S3 and automatically move them to cheaper storage after 30 days of no access, then delete them after 365 days. Which feature enables this?
Which AWS service provides a FULLY MANAGED message broker supporting ActiveMQ and RabbitMQ protocols?
What does "multi-AZ" deployment provide for Amazon RDS?
Which AWS service would you use to deploy, manage, and scale a containerized application using Docker images WITHOUT writing Kubernetes configuration?
Which Amazon S3 feature provides STRONG READ-AFTER-WRITE CONSISTENCY for all operations?
A company needs to distribute incoming TCP traffic across multiple EC2 instances with ULTRA-LOW LATENCY and support for millions of requests per second. Which load balancer is BEST?
Amazon DynamoDB Accelerator (DAX) is BEST described as:
Which AWS service enables you to query data directly in Amazon S3 using standard SQL WITHOUT loading it into a database?
A company wants to implement a content moderation system that automatically detects inappropriate images uploaded by users. Which AWS service should they use?
Which of the following is the PRIMARY difference between Amazon Kinesis Data Streams and Amazon SQS?
Which AWS service provides a managed ETL (Extract, Transform, Load) service for preparing data for analytics?
A company wants to make their application available in a SECOND AWS Region for disaster recovery, with a Recovery Time Objective (RTO) of near-zero. Which DR strategy BEST fits?
Which service provides a GLOBAL CACHE for database queries to reduce latency for read-heavy applications?
A company is migrating a large on-premises data warehouse to AWS and wants to leverage columnar storage and parallel query processing for analytics. Which service is BEST?
A company wants to run their big data Spark workloads on AWS without managing clusters. Which service is MOST appropriate?
Which of the following is a key characteristic of Amazon Aurora that DIFFERENTIATES it from standard Amazon RDS MySQL?
AWS Outposts is BEST described as:
Which Amazon EC2 instance family is OPTIMIZED for workloads requiring high memory-to-CPU ratios, such as in-memory databases and real-time processing of large datasets?
What does Amazon Route 53 "latency-based routing" do?
Which AWS service would you use to automatically extract text and data from scanned documents and forms without machine learning expertise?
Which of the following EC2 pricing models provides a discount in exchange for a commitment to a SPECIFIC instance type in a SPECIFIC Region and Availability Zone?
A company uses 100 TB of S3 Standard storage. They notice their costs are high because data is rarely accessed after 30 days. If they enable S3 Intelligent-Tiering, what happens?
A company has On-Demand EC2 instances running 24/7 for a production application that will run for the next 3 years. What is the MOST cost-effective purchasing option?
A company wants to improve the availability of their website by automatically routing traffic to a backup site if the primary becomes unhealthy. Without any additional cost beyond the service itself, which Route 53 feature enables this?
Which of the following BEST describes AWS Wavelength?
An application needs to store session data that expires automatically after 30 minutes of inactivity. Which service is BEST suited for this use case with minimal management overhead?
Which statement about Amazon RDS Read Replicas is CORRECT?
Which AWS database service is FULLY COMPATIBLE with MongoDB APIs?
A machine learning team needs a Jupyter notebook environment with pre-built ML frameworks and GPU support, without managing infrastructure. Which service is MOST appropriate?
A company wants to provide internet connectivity to EC2 instances in a private subnet WITHOUT assigning public IP addresses. What is the correct architecture?
Which of the following is an advantage of using AWS CloudFormation StackSets?
Which AWS service provides a VISUAL WORKFLOW tool to orchestrate distributed applications and build human review workflows?
Which Amazon EC2 feature allows you to run a script automatically when an instance starts for the FIRST TIME?
What is AWS DataSync primarily used for?
Which AWS service provides serverless, fully managed Apache Spark and Hive jobs without cluster provisioning?
A company's application needs to process exactly one message at a time in STRICT ORDER with no duplicates. Which SQS queue type provides this?
What is the maximum retention period for messages in Amazon SQS?
Which AWS service enables a company to create a private API endpoint accessible only from within their VPC?
An application needs to convert text to speech in real time. Which AWS AI service provides this capability?
Which of the following CORRECTLY describes "Availability" in the context of AWS SLAs?
Which AWS service translates natural language into database queries and returns results in plain English, using generative AI?
A company needs to send 1 million marketing emails per month at the lowest cost. Which AWS service is MOST cost-effective?
Which of the following AWS services is used to create a PRIVATE NETWORK between multiple VPCs and on-premises networks in a HUB-AND-SPOKE topology?
Which AWS service provides AUTOMATIC language translation for text content?
Which statement about Amazon VPC is CORRECT?
A nonprofit organization wants to start using AWS for a new application with minimal upfront cost and no long-term commitment. They expect very low initial usage but unpredictable growth. Which pricing model is MOST APPROPRIATE to start?
A company uses AWS and their application data must remain in AUSTRALIA due to data sovereignty laws. They choose ap-southeast-2 (Sydney). A new developer suggests enabling S3 Cross-Region Replication to us-east-1 for "better durability." Why is this PROBLEMATIC?
What does "STOP SPENDING MONEY ON UNDIFFERENTIATED HEAVY LIFTING" mean in practice for a software company?
A company wants to deploy a WORDPRESS WEBSITE on AWS with the LEAST OPERATIONAL OVERHEAD. Which approach is MOST appropriate?
What is the MAXIMUM NUMBER OF VPCs allowed per AWS ACCOUNT per REGION by default?
A company uses AMAZON RDS AURORA. They want to TEST A DATABASE SCHEMA CHANGE on a copy of production data without provisioning a new full database cluster. Which Aurora feature enables near-instant, storage-efficient clone creation?
Which AWS service provides MANAGED APACHE KAFKA-COMPATIBLE streaming for applications that already use the Kafka API — without needing to manage Kafka brokers, ZooKeeper, or cluster infrastructure?
A company uses AWS LAMBDA and notices some functions are frequently hitting the CONCURRENCY LIMIT, causing throttles. They want to GUARANTEE that a critical function ALWAYS has concurrency available. What should they configure?
A company wants to MIGRATE AN ON-PREMISES MYSQL DATABASE to AWS with MINIMAL DOWNTIME — the application must remain live during migration. Which approach achieves this?
What is the difference between AMAZON RDS "AUTOMATED BACKUPS" and "MANUAL DB SNAPSHOTS" in terms of DELETION BEHAVIOR?
Which AWS SERVICE enables you to STREAM REAL-TIME APPLICATION LOGS from EC2 instances or Lambda functions to AMAZON OPENSEARCH SERVICE for search and visualization?
Which AWS service provides INTELLIGENT SEARCH capabilities across ENTERPRISE CONTENT REPOSITORIES — connecting to SharePoint, Confluence, Salesforce, and other document sources?
A company wants to build a VOICE ASSISTANT that understands natural language commands and integrates with AWS LAMBDA to execute actions. Which combination of AWS AI services enables this?
Which of the following CORRECTLY describes AMAZON S3's "MULTIPART UPLOAD" feature?
What does AMAZON CLOUDWATCH "DETAILED MONITORING" provide for EC2 instances that BASIC MONITORING does not?
A company uses AWS CLOUDFORMATION and wants to create a STACK that deploys resources to MULTIPLE REGIONS and MULTIPLE ACCOUNTS simultaneously. Which CloudFormation feature enables this?
A company's machine learning team wants to LABEL IMAGES for training data — identifying dogs vs. cats in 100,000 photos. They need a managed workflow. Which AWS service orchestrates this human labeling process?
A company wants to provide SECURE, BROWSER-BASED ACCESS to their EC2 INSTANCES without opening any inbound ports. Which AWS service enables this?
A company uses AMAZON CLOUDWATCH and wants to CREATE AN ALARM that triggers ONLY when BOTH CPU UTILIZATION IS HIGH AND DISK WRITES ARE HIGH simultaneously — filtering out false alarms when only one metric is elevated. Which feature achieves this?
A company migrates their web application to AWS and wants to use a CONTENT DELIVERY NETWORK to cache STATIC ASSETS (images, CSS, JavaScript) close to global users. Which service provides this?
What is AMAZON ELASTIC CONTAINER REGISTRY (ECR) LIFECYCLE POLICIES?
A company runs a workload that needs EC2 instances for exactly 6 months while they develop and test a new product, after which the product will be decommissioned. What EC2 pricing is MOST appropriate?
Which of the following AWS services is available COMPLETELY FREE with NO USAGE CHARGES — it's a free service for all AWS customers?
A startup with limited budget wants to MAXIMIZE COST SAVINGS for their development and test environments that run Monday through Friday, 9 AM to 6 PM. The instances MUST be available and CANNOT be interrupted during these hours. Which purchasing model is BEST?
A company is evaluating which SAVINGS PLAN TYPE provides the greatest discount for EC2 instances in a specific instance family in a specific Region if they can commit to that family and Region for 1 year.
A company uses AMAZON API GATEWAY with LAMBDA. Users are experiencing HIGH LATENCY on the first request after a period of inactivity. This is caused by LAMBDA COLD STARTS. What is the MOST APPROPRIATE solution for a production API?
A company uses AMAZON VPC with PUBLIC and PRIVATE SUBNETS. EC2 instances in the PRIVATE SUBNET need to DOWNLOAD SOFTWARE UPDATES from the internet but should NEVER be directly reachable from the internet. Which component provides OUTBOUND-ONLY internet connectivity?
A company uses AWS CLOUDFORMATION to manage their infrastructure. A junior developer accidentally runs a stack DELETE on a production stack. Which CloudFormation protection mechanism would have PREVENTED this?
A company uses AMAZON EC2 AUTO SCALING. When a scale-out event occurs, new instances take 5 minutes to be healthy. During this time, the existing instances are overloaded. How can they improve the RESPONSIVENESS of Auto Scaling?
A company needs to PROCESS MILLIONS OF RECORDS stored in S3 in PARALLEL — each record requires independent processing taking about 30 seconds. What is the MOST COST-EFFECTIVE serverless architecture?
What is AMAZON CLOUDWATCH SYNTHETICS used for?
A company deploys their web application using AMAZON ELASTIC BEANSTALK. They want to deploy a new version with ZERO DOWNTIME. Which Elastic Beanstalk deployment policy achieves this?
A company uses AMAZON RDS and wants to MINIMIZE DATABASE COSTS for a workload that is predictably consistent — running the same query load 24 hours a day, 7 days a week, year-round. Which RDS cost optimization is MOST appropriate?
A company wants to implement a MULTI-REGION ACTIVE-ACTIVE ARCHITECTURE for their DynamoDB-backed application — allowing reads and writes from BOTH us-east-1 and eu-west-1 with automatic conflict resolution. Which DynamoDB feature enables this?
Which AWS service would a company use to ANALYZE CUSTOMER REVIEWS stored in S3 — identifying overall sentiment (positive/negative), key topics mentioned, and named entities (product names, people)?
A company uses AWS CODEPIPELINE. During the DEPLOY stage, the deployment to production FAILS. What does CodePipeline do by DEFAULT?
A company uses AMAZON SQS STANDARD QUEUE and processes messages with AWS LAMBDA. They notice that SOME MESSAGES ARE PROCESSED TWICE, causing duplicate database entries. What is the MOST APPROPRIATE solution?
What is the purpose of AMAZON LOCATION SERVICE?
A company wants to USE AWS BUT NEEDS TO PROCESS DATA LOCALLY at a remote oil rig with limited internet connectivity. Which AWS service extends AWS compute and storage capabilities to this edge location?
A company uses AWS LAMBDA for data processing. Their function reads 1,000 records from S3, processes each for 100ms, and writes results to DynamoDB. With the default memory (128 MB), each function run takes 3 minutes. After increasing memory to 1 GB, the same function takes 45 seconds. Why did performance improve beyond just memory?
Which AWS service provides a FULLY MANAGED MESSAGE BROKER supporting both ACTIVEMQ and RABBITMQ — allowing migration of on-premises messaging applications to AWS WITHOUT changing application code?
A company uses AMAZON CLOUDWATCH and wants to create an ALARM that automatically SCALES DOWN EC2 INSTANCES when CPU utilization stays BELOW 20% for 30 CONSECUTIVE MINUTES. Which scaling policy type achieves this?
A company uses AWS and wants to TRANSLATE USER REVIEWS from 30 different languages to English for analysis using Amazon Comprehend. Which service handles the translation?
AWS describes the concept of "stopping guessing about capacity." Which cloud feature DIRECTLY addresses this?
What does "high availability" mean in AWS architecture?
Which of the following is the BEST example of "increasing speed and agility" as a cloud benefit?
Which EC2 instance type is MOST appropriate for a genomics workload requiring massive parallel data processing and high local disk throughput?
A company deploys an application using Amazon ECS on AWS Fargate. What does the customer NOT need to manage?
Which AWS service would help a company implement a SERVERLESS REST API that scales automatically and handles authentication?
A company has an S3 bucket in us-east-1 storing user-uploaded videos. They want users in Asia to experience faster upload speeds. Which service helps?
Which AWS database service is BEST for storing time-series data from IoT sensors (billions of rows of timestamped measurements)?
A company needs to run Windows-based .NET applications in containers on AWS with the LEAST operational overhead. Which service should they use?
Which AWS service provides FULLY MANAGED Apache Cassandra-compatible database?
A company wants to send application logs from on-premises servers to Amazon CloudWatch Logs without migrating the servers to AWS. What do they need to install?
What is the MAIN difference between Amazon S3 and Amazon EFS?
Which AWS service should a company use to automate infrastructure provisioning using PYTHON or TYPESCRIPT code (not YAML/JSON templates)?
A company needs a managed message broker that supports BOTH publish/subscribe AND point-to-point messaging patterns using industry-standard protocols (AMQP, MQTT, STOMP). Which service fits?
What is Amazon Elastic Container Registry (ECR)?
A company wants to analyze clickstream data from their website in REAL TIME to detect fraud. Which AWS service is MOST appropriate?
Which AWS service provides a FULLY MANAGED environment for running Apache Hadoop workloads?
A developer needs to convert a JSON payload in an API response to a different format without running any server-side code. Which AWS service enables this with built-in data transformation?
Which of the following describes Amazon FSx for Windows File Server?
Which AWS service enables you to run SQL queries DIRECTLY against data in DynamoDB without extracting it first?
What is the purpose of Amazon Route 53 "traffic flow" and "geoproximity routing"?
Which Amazon S3 storage class is designed for LONG-TERM archival with retrieval times that CAN be flexible (bulk retrieval in 5–12 hours) and provides the LOWEST storage cost?
An application must process messages in the ORDER they were sent, and each message must be processed EXACTLY ONCE. Which SQS queue type and feature combination is required?
Which statement about Amazon Aurora Serverless v2 is CORRECT?
A company has a containerized microservices application. Each microservice is a separate Docker container. They want to deploy with service discovery built in, load balancing, and auto-recovery if a container dies. What is the BEST AWS solution?
Which AWS storage service provides a fully managed NFS file system that can be shared across THOUSANDS of EC2 instances and scales automatically?
A company wants to deploy a MACHINE LEARNING model for real-time inference on their website without managing any servers. Which AWS service provides this?
Which of the following is the CORRECT definition of an AWS "edge location"?
Which AWS service enables customers to run LICENSED software (Oracle, SQL Server, SAP) on hardware dedicated to a single customer and bring their own licenses (BYOL)?
What does the AWS "On-Demand" pricing model mean for Amazon EC2?
A company pays $0.023 per GB for S3 Standard storage. They store 100 TB. If they switch 80% of their data (rarely accessed after 30 days) to S3 Standard-IA at $0.0125/GB, what happens to their retrieval costs?
Which of the following is ALWAYS free in AWS, regardless of usage volume?
Which of the following AWS services can invoke a Lambda function AUTOMATICALLY in response to an event? (Choose TWO)
What does "eventual consistency" mean in the context of AWS services?
Which AWS service provides a VISUAL drag-and-drop interface to design, run, and monitor ETL pipelines?
A company is migrating a large on-premises Oracle database to AWS. They need the schema converted to Amazon Aurora PostgreSQL. Which tool handles the schema conversion?
Which Amazon EC2 feature helps reduce COSTS by automatically identifying and terminating underutilized instances?
A company's application needs to store user session data with single-digit millisecond latency, and the data should automatically expire after inactivity. Which combination is MOST appropriate?
What is the MAXIMUM duration for an AWS Lambda function execution?
Which AWS service helps reduce latency for a GLOBAL DynamoDB application by automatically maintaining synchronized copies of DynamoDB tables in multiple Regions?
A company needs their EC2 instances to process work only during business hours (9 AM to 6 PM). What Auto Scaling feature minimizes costs?
Which of the following statements about Amazon S3 "requester pays" buckets is CORRECT?
What is the DIFFERENCE between an AWS Region and an AWS Edge Location?
Which service provides a MANAGED WORKFLOW to move large volumes of data between on-premises and AWS storage using AUTOMATION AND SCHEDULING?
A company wants to provide managed SFTP access to their S3 buckets for partners who send daily data files. Which service is MOST appropriate?
Which of the following is TRUE about AWS Availability Zones within a Region?
A company wants to build a data lake on AWS to store structured, semi-structured, and unstructured data at scale. Which AWS service is the FOUNDATION of a data lake?
Which of the following describes the use case for AWS AppSync?
What does the term "infrastructure as code" (IaC) mean in the AWS context?
A global company wants to reduce latency for their DynamoDB reads for users in Asia while their primary DynamoDB table is in us-east-1. What is the BEST AWS solution?
Which of the following is an example of a "multi-tenant" cloud service on AWS?
A media company wants to AUTOMATICALLY transcode uploaded video files to multiple formats (HLS, MP4) when a video is uploaded to S3. Which architecture is MOST appropriate?
What is the purpose of AWS Elastic Beanstalk's "worker environment" tier?
A company is implementing disaster recovery and sets a Recovery Point Objective (RPO) of 1 hour. What does this mean?
Which AWS service provides INTELLIGENT DOCUMENT PROCESSING that can extract key-value pairs from tax forms, medical records, and loan applications without custom ML model training?
Which of the following CORRECTLY describes the relationship between AWS CloudFormation stacks and resources?
A company is evaluating whether to use INFRASTRUCTURE AS CODE (IaC) for their AWS deployments. Which is the STRONGEST business justification for IaC?
Which AWS Cloud concept describes the ability of a system to INCREASE RESOURCES when demand rises AND DECREASE RESOURCES when demand falls — automatically?
Which Amazon EC2 PRICING MODEL provides up to 90% discount but can be INTERRUPTED with a 2-minute warning when AWS needs the capacity back?
A company has a web application on EC2 behind an Application Load Balancer. Traffic doubled last month and will double again next month. How should they architect for THIS scale automatically?
What is the key architectural difference between AMAZON SQS and AMAZON SNS?
A company wants to run a CONTAINERIZED APPLICATION on AWS WITHOUT managing servers, clusters, or any underlying infrastructure. Which service is MOST appropriate?
Which Amazon S3 STORAGE CLASS is designed for data that is accessed LESS THAN ONCE A MONTH and can tolerate being stored in ONLY ONE AVAILABILITY ZONE?
A company uses AWS LAMBDA. Their function processes records from an AMAZON KINESIS DATA STREAM. Which statement about this integration is CORRECT?
A company uses AMAZON RDS. They want to IMPROVE READ PERFORMANCE for their read-heavy application without changing the primary database instance. What should they create?
Which AWS service would you use to MIGRATE AN EXISTING ORACLE DATABASE to Amazon Aurora PostgreSQL?
A company wants to analyze PETABYTES of data stored in Amazon S3 using complex SQL queries. They need FAST, CONSISTENT performance for repeated analytical queries and support for BI tools. Which service BEST fits?
A company's application needs to send EMAILS when orders are placed (transactional emails) and also send WEEKLY NEWSLETTER CAMPAIGNS to 1 million subscribers. Which service handles BOTH use cases?
Which of the following is the MOST ACCURATE description of AWS GLOBAL ACCELERATOR compared to Amazon CloudFront?
What does AMAZON CLOUDWATCH ALARMS do when the monitored metric BREACHES a threshold?
Which AWS SERVICE HELPS ORGANIZATIONS DISCOVER what on-premises servers they have, their utilization, and dependencies — before planning a migration to AWS?
A company stores 100 TB of data in Amazon S3 Standard. The data was heavily accessed in the first 30 days but is now rarely accessed. They want to REDUCE STORAGE COSTS without changing the data retrieval time significantly. Which storage class is BEST?
A company's application on AWS uses AMAZON SQS for decoupling. A bug in the consumer code causes all messages to fail processing. After the configured number of retries, where do failed messages go?
Which AWS service is BEST for building a RECOMMENDATION ENGINE that personalizes product suggestions for individual users based on their behavior?
A company wants to build an application that RECOGNIZES FACES, DETECTS OBJECTS, and MODERATES INAPPROPRIATE CONTENT in uploaded images. Which AWS service provides these capabilities?
Which Amazon S3 feature allows a LIFECYCLE POLICY to automatically transition objects to cheaper storage classes based on age?
What does AMAZON ELASTICACHE FOR REDIS provide that a relational database like Amazon RDS cannot efficiently provide?
A company uses AWS and wants to ORCHESTRATE A WORKFLOW that involves: (1) Lambda function, (2) waiting up to 7 days for a human approval, (3) then calling an API endpoint based on the approval decision. Which service is DESIGNED for this?
A company uses AMAZON EC2 and wants to REDUCE COSTS for a DEVELOPMENT ENVIRONMENT that runs only during business hours (8 AM – 6 PM, Monday – Friday). What is the MOST cost-effective option?
A company is choosing between AWS SAVINGS PLANS and EC2 RESERVED INSTANCES. They have predictable workloads but are UNSURE which exact instance types they'll need in 12 months. Which is MORE FLEXIBLE?
Which AWS resource is a FREE, COMMUNITY-DRIVEN TECHNICAL FORUM where AWS customers and experts can ask and answer questions — replacing the older AWS Forums?
A company asks: "What's the difference between HIGH AVAILABILITY and FAULT TOLERANCE?" Which answer is MOST accurate?
Which of the following CORRECTLY describes the AMAZON S3 data model?
A company is designing a DISASTER RECOVERY architecture. Their RTO (Recovery Time Objective) is 4 hours and RPO (Recovery Point Objective) is 1 hour. Which DR strategy BEST meets these requirements at the LOWEST COST?
A company is deploying a NEW MICROSERVICE on AWS. They want to GRADUALLY SHIFT TRAFFIC from the old version to the new version — starting with 5%, then 25%, then 100% — to validate stability. Which combination supports this CANARY DEPLOYMENT?
A company's developers write PYTHON CODE for AWS LAMBDA. They want LINE-BY-LINE CODE SUGGESTIONS as they type in their IDE. Which AWS service provides this?
A company wants to use AWS for BIG DATA PROCESSING using Apache Spark. They don't want to manage the Spark cluster infrastructure. Which service is MOST appropriate?
Which of the following BEST describes the relationship between AMAZON VPC and AVAILABILITY ZONES?
A company uses AMAZON API GATEWAY and wants to REDUCE BACKEND LOAD by returning cached responses for frequently requested, non-changing data. Which feature enables this?
A company is migrating to AWS and wants to use the "STRANGLER FIG" pattern. Which of the following BEST describes this migration approach?
A company needs to build a CHATBOT for customer service that can understand spoken voice input, determine customer intent, and respond appropriately. Which AWS AI services form the COMPLETE pipeline?
Which of the following is an example of USING THE RIGHT TOOL FOR THE JOB — a key principle in AWS architecture?
What is the purpose of AMAZON ELASTIC CONTAINER REGISTRY (ECR)?
Which AWS service allows you to SEARCH ENTERPRISE CONTENT (SharePoint, S3, Confluence, Salesforce, databases) using NATURAL LANGUAGE QUESTIONS and get precise answers powered by ML?
Which statement BEST describes the difference between "scalability" and "elasticity" in AWS?
Which of the following is the MOST PRECISE description of an AWS "Region"?
Which of the following CORRECTLY describes how RESOURCE-BASED POLICIES differ from IDENTITY-BASED POLICIES in cross-account scenarios?
Which of the following CORRECTLY describes the relationship between Amazon EC2 and Amazon EBS?
A company wants to run MACHINE LEARNING INFERENCE at the EDGE — on devices with limited connectivity (oil rigs, factory floors). Which AWS service enables this?
Which Amazon EC2 PLACEMENT GROUP strategy is BEST for a Hadoop cluster where you need high network throughput but instances should be distributed so a single hardware failure doesn't take down too many nodes?
What is the maximum number of S3 LIFECYCLE RULES per S3 bucket?
A company runs a STATELESS WEB APPLICATION on EC2. To reduce costs, they want to offload session state storage so that any instance can serve any user's request. Which service stores session state MOST cost-effectively?
What does "COLD START" mean in AWS Lambda, and which feature ELIMINATES it?
Which AWS storage service would you choose for a GENOMICS WORKLOAD that requires high-throughput sequential reads from a parallel file system — processing terabytes of genome sequence data?
A company's application uses Amazon SQS. Messages older than 14 days haven't been processed. What happens to them?
A company wants to send REAL-TIME notifications to MILLIONS OF SUBSCRIBERS when a price change occurs on their e-commerce platform. Which AWS service is BEST suited for this at scale?
What is the purpose of an AWS LAUNCH TEMPLATE compared to a LAUNCH CONFIGURATION in EC2 Auto Scaling?
A company runs multiple AWS Lambda functions that all need to access the same internal database in a VPC. What is a concern when Lambda functions are deployed IN a VPC?
Which of the following describes the use case for AWS DATASYNC compared to AWS SNOWBALL?
Which Amazon EC2 feature allows you to LIMIT the maximum amount of CPU credits a burstable instance (T family) can earn — preventing it from bursting excessively and accumulating a large CPU credit balance?
A company stores 1 TB of data in S3 Standard. After analysis, 900 GB is never accessed after 30 days. Which configuration saves the MOST money with MINIMAL effort?
A company uses AWS CodePipeline. They want to manually APPROVE a deployment to production before it proceeds. Which CodePipeline feature enables this?
Which AWS service provides a way to DEPLOY ML MODELS TO IoT EDGE DEVICES with optimized performance for the device's hardware?
A company's DynamoDB table occasionally throttles during write spikes. They use PROVISIONED capacity mode with fixed read/write capacity units. What is the SIMPLEST fix?
Which AWS service enables you to CREATE CUSTOM DASHBOARDS displaying metrics from MULTIPLE AWS ACCOUNTS AND REGIONS in a single view?
A company uses AWS GLUE to catalog and ETL data. They notice Glue jobs are failing because the source data has UNEXPECTED SCHEMA CHANGES. Which Glue feature helps detect and handle schema evolution?
A company uses AWS and wants to set up AUTOMATIC RESPONSES when an AWS service has an issue that affects their specific resources — sending a Slack notification and creating a ticket in their ITSM tool. Which service drives this workflow?
A company has a SERVERLESS APPLICATION with highly variable traffic — sometimes zero requests, sometimes 10,000/second. Which pricing approach BEST aligns costs with actual usage?
A company wants to build a REAL-TIME LEADERBOARD for a mobile game that tracks millions of concurrent players' scores, requires sub-millisecond updates, and needs sorted retrieval of top 100 players. Which is the BEST solution?
A company runs Amazon EC2 instances in a PRIVATE SUBNET. They need those instances to download software updates from the internet. Which component is REQUIRED?
Which statement CORRECTLY describes the pricing difference between AMAZON EFS "Standard" and "EFS Infrequent Access" storage classes?
A company's Lambda function needs to access resources in a VPC (RDS database) AND also call external third-party APIs over the internet. What is the CORRECT architecture?
Which of the following AWS services uses GRAPH-BASED ANALYSIS to detect fraud patterns, money laundering, and social network threats?
A company has a Lambda function that processes images. The function occasionally fails due to transient errors. Instead of losing failed events, they want to retry 3 times and then save failures for analysis. Which Lambda features enable this?
A company uses AMAZON AURORA GLOBAL DATABASE. What does this provide?
What is the purpose of AWS COMPUTE OPTIMIZER'S "ENHANCED INFRASTRUCTURE METRICS"?
A company uses Amazon SQS STANDARD queues. They notice occasional DUPLICATE MESSAGES being processed. What causes this and how is it typically handled?
A company wants to ANALYZE CUSTOMER SENTIMENT from thousands of product reviews stored in S3. Which AWS AI service requires ZERO custom training for this use case?
A company wants to deploy a KUBERNETES APPLICATION on AWS WITHOUT managing the Kubernetes control plane OR the worker nodes. Which combination achieves this?
What is the AWS service for MANAGED ROBOTIC PROCESS AUTOMATION (RPA) that automates repetitive tasks across web applications and desktop applications?
A company uses AWS and wants to ensure their AMAZON EC2 AUTO SCALING GROUP maintains a minimum of 2 instances across TWO AVAILABILITY ZONES even when one AZ has issues. What configuration ensures this?
What is the purpose of AMAZON CONNECT WISDOM?
A company uses AMAZON AURORA SERVERLESS v2 FOR THEIR PRODUCTION DATABASE. Which of the following is a TRUE STATEMENT?
Which of the following is the BEST use case for AMAZON KINESIS VIDEO STREAMS?
A company wants to use AMAZON S3 for a STATIC WEBSITE and needs CUSTOM ERROR PAGES (e.g., a branded 404 page). Which S3 feature supports this?
A company wants to create a CHATBOT that can carry on MULTI-TURN CONVERSATIONS — understanding context across multiple exchanges. Which AWS service is PURPOSE-BUILT for this?
What is the PRIMARY difference between AWS CodeDeploy "IN-PLACE" and "BLUE/GREEN" deployment?
A company uses AMAZON CLOUDWATCH and wants to create a COMPOSITE ALARM that fires only when BOTH CPU utilization is high AND network errors are spiking simultaneously. Which CloudWatch feature enables this?
Which AWS service provides a MANAGED NATURAL LANGUAGE INTERFACE to query your business data (e.g., "What were last quarter's top products by revenue?") and get instant visual answers?
Which statement about AWS Availability Zones (AZs) is MOST accurate?
Which Amazon EC2 feature allows you to PAUSE and RESUME an instance — saving its RAM state to EBS — so it restarts exactly where it left off?
Which AWS service provides a MANAGED, SERVERLESS DATA CATALOG that automatically crawls data sources, infers schemas, and makes data discoverable across the organization?
A company wants to build an application that sends PUSH NOTIFICATIONS to iOS and Android devices. Which AWS service handles the platform-specific notification delivery?
What is the difference between an ELASTIC IP ADDRESS and a PUBLIC IP ADDRESS in Amazon EC2?
Which AWS service allows you to QUERY RELATIONAL DATA across MULTIPLE databases (including on-premises) using a single SQL interface, with federated queries?
Which AWS service would you use to ORCHESTRATE a data pipeline that runs a Glue ETL job, then queries with Athena, then loads results to Redshift — with error handling and retries?
What is the maximum execution timeout for an AWS Fargate task?
Which AWS service provides INTELLIGENT TRAFFIC MANAGEMENT at Layer 7 by distributing requests based on content — supporting features like sticky sessions, weighted target groups, and redirects?
A company wants to implement a BLUE/GREEN DEPLOYMENT for an AWS Lambda function — routing 10% of traffic to the new version while keeping 90% on the old version. Which Lambda feature enables this?
A company runs a real-time bidding platform for digital advertising. They need to process millions of auction requests per second with < 5ms latency. Which database is MOST appropriate?
Which Amazon EC2 feature allows you to define which INSTANCE TYPES and PURCHASE OPTIONS to use in an Auto Scaling Group — mixing On-Demand and Spot across multiple instance families for cost optimization?
Which of the following is a KEY DIFFERENCE between AWS Fargate and AWS Lambda for running containerized workloads?
What is the purpose of Amazon CloudWatch EMBEDDED METRIC FORMAT (EMF)?
A company has a DynamoDB table with a partition key of `userId`. They notice that one user generates 80% of all requests, causing HOT PARTITION issues. Which strategies help address this? (Choose TWO)
Which AWS service enables you to run SQL queries against data in S3 AND join that data with tables in Amazon RDS or Aurora — all in a single serverless query?
A company uses AWS Lambda and wants to share common utility code (logging, database connections) across 10 different Lambda functions WITHOUT duplicating the code. Which feature enables this?
Which AWS service provides a FULLY MANAGED KAFKA-COMPATIBLE streaming service built entirely on AWS — with serverless, auto-scaling, and no broker management?
Which of the following EC2 instance types has the LOWEST HOURLY COST for a given compute capacity?
Which AWS pricing dimension does Amazon RDS charge for that Amazon EC2 does NOT?
A company wants to implement a CANARY DEPLOYMENT for their API Gateway + Lambda API — sending 5% of traffic to the new Lambda version. How should they configure this?
Which of the following is a valid reason to use AMAZON AURORA rather than standard AMAZON RDS MySQL?
What is the purpose of AWS Lake Formation?
Which of the following scenarios would benefit MOST from Amazon SQS LONG POLLING?
A company needs to run a STATEFUL gaming application requiring persistent storage for game state AND low-latency real-time updates. Which combination is MOST appropriate?
Which AWS service enables FINE-GRAINED LOG FILTERING, creating metrics from log data, and setting alarms based on log content — all without writing custom code?
What does "EVENTUALLY CONSISTENT" mean for Amazon DynamoDB reads, and when is "STRONGLY CONSISTENT" needed?
Which AWS service provides a MANAGED ENVIRONMENT for running JUPYTER NOTEBOOKS with access to big data processing frameworks, without managing infrastructure?
Which of the following is a CORRECT statement about how AWS CHARGES for Amazon CloudWatch?
What is the purpose of an Amazon VPC "Egress-Only Internet Gateway"?
Which of the following BEST describes the difference between Amazon Redshift and Amazon Athena for analytical workloads?
A company wants to run a BATCH PROCESSING JOB that analyzes images, requires GPU acceleration, runs for 6 hours, and should use the cheapest available compute. Which is BEST?
A company is comparing the cost of running 500 servers on-premises versus on AWS. The on-premises analysis includes hardware, power, cooling, real estate, and staff. The AWS analysis includes only EC2 costs. What is this comparison MISSING?
A company has a workload that runs for exactly 3 months each year (e.g., tax season processing). What is the MOST cost-effective EC2 purchasing option?
Which of the following is TRUE about AWS Regions?
A company wants to understand its current IT portfolio before planning an AWS migration. Which AWS tool helps collect detailed information about on-premises servers including CPU utilization, memory, network, and installed software?
A company wants to deploy a containerized application that automatically scales to zero when there are no requests and scales back up instantly when traffic arrives. Which service provides this?
What is the difference between Amazon S3 "Standard" and "One Zone-IA" storage classes?
A company needs to run code DIRECTLY ON THE EDGE LOCATIONS of CloudFront with access to the full Node.js/Python runtime and the ability to make network calls to external services. Which feature should they use?
Which AWS database service provides LEDGER functionality — maintaining a cryptographically verifiable, immutable, and transparent transaction log?
A company wants to provide their data science team with a managed Jupyter notebook environment that persists across sessions and has direct access to S3, SageMaker training, and other AWS services. Which service is MOST appropriate?
A developer wants to INVOKE an AWS Lambda function on a schedule (e.g., every 15 minutes) without any external trigger. Which service should they use?
A company has a legacy application that requires a specific Windows Server version. They want to run it on AWS. Which approach gives them the MOST CONTROL over the Windows environment?
A company stores large amounts of data in Amazon S3. They want to reduce storage costs for data that is accessed UNPREDICTABLY — sometimes frequently, sometimes not at all. Which storage class is DESIGNED for this?
Which AWS service provides a FULLY MANAGED service for running ELASTICSEARCH workloads?
A company wants to send emails to customers when orders are placed. The emails must be delivered RELIABLY and at HIGH VOLUME. Which AWS service handles this BEST?
A company runs a monolithic application on EC2 and wants to start migrating to microservices. What is the RECOMMENDED FIRST STEP?
Which Amazon EC2 feature allows multiple instances to share a SINGLE elastic network interface (ENI) for common use cases like high availability failover?
Which AWS service provides SERVERLESS GEOSPATIAL capabilities to process, visualize, and analyze location data at scale?
A company wants all CloudFormation templates to be reviewed and approved before deployment. Which CloudFormation feature supports this workflow?
What does Amazon SageMaker "Model Monitor" do?
Which S3 feature provides a way to call Lambda or other AWS services FROM WITHIN S3 (before or after an object is stored), enabling real-time object transformation?
A company uses AWS Step Functions. What happens if one state in the state machine fails and there is no error handling configured?
What is the primary benefit of using Amazon ElastiCache for Redis over a self-managed Redis cluster on EC2?
Which feature of AWS Lambda allows it to stay "warm" and avoid cold starts for latency-sensitive applications?
A company needs to process a stream of financial transactions and detect patterns (fraud) within SECONDS. Which architecture is MOST appropriate?
Amazon Comprehend Medical is distinct from Amazon Comprehend because:
Which feature of AWS Systems Manager allows you to access EC2 instances securely WITHOUT opening inbound ports (22/3389) or managing SSH keys?
A company uses Amazon Kinesis Data Firehose to deliver data to Amazon Redshift. The data needs to be TRANSFORMED before loading (e.g., convert JSON to Parquet). Which feature handles this?
A company uses EC2 On-Demand Instances. AWS announces a price reduction for the instance type they use. What happens automatically?
Which AWS pricing component is charged for Amazon CloudFront?
Which statement about AWS data transfer pricing is CORRECT?
Which of the following CORRECTLY describes how AWS Savings Plans differ from Reserved Instances in terms of FLEXIBILITY?
Which Amazon S3 feature allows you to QUERY data directly inside S3 objects (CSV, JSON, Parquet) without downloading them — filtering data at the S3 layer?
Which of the following BEST describes the benefit of using AWS managed services (like RDS, DynamoDB) compared to self-managed databases on EC2?
A company wants to MONITOR the health of their AWS services GLOBALLY in real time — not just their account, but the overall AWS service status. Which tool provides this?
Which AWS storage service is OPTIMIZED for high-performance computing (HPC) and machine learning workloads, providing sub-millisecond latency and hundreds of GB/s throughput?
A company runs a global application. They want to ensure that user traffic from Europe routes to eu-west-1 and traffic from Asia routes to ap-southeast-1, regardless of which region has lower latency. Which Route 53 routing policy achieves this?
A company stores terabytes of log data in S3 and wants to analyze it using familiar SQL without loading it into a database. They also want to visualize the results. Which AWS combination is MOST appropriate?
What does the AWS "responsibility" for "availability" mean in the context of S3's SLA?
Which Amazon EC2 Auto Scaling feature launches instances using the MOST AVAILABLE and LOWEST-COST Spot Instance pools?
A company needs to process 1 million images stored in S3 as quickly as possible. Which compute approach provides the MOST PARALLELISM without managing servers?
What is the MAXIMUM number of S3 buckets allowed per AWS account by DEFAULT?
A company uses Amazon RDS and wants to ensure that database connections from their application tier are pooled efficiently — especially important since their app uses Lambda functions that create many short-lived connections. Which service addresses this?
Which of the following is a VALID use case for Amazon Simple Workflow Service (SWF)?
Which Amazon CloudWatch feature allows you to create a UNIFIED METRICS AND LOGS DASHBOARD visible to the whole operations team?
What does Amazon CloudWatch Synthetics do?
Which of the following CORRECTLY describes Amazon Elastic Block Store (EBS) Multi-Attach?
Which statement about Amazon DynamoDB's "on-demand" capacity mode is CORRECT?
A company wants to migrate a MICROSOFT SHAREPOINT workload to AWS, keeping Windows-native file sharing capabilities. Which AWS service is MOST appropriate for the underlying shared file storage?
A startup is building a mobile app and needs a FULLY MANAGED BACKEND without writing server-side code. Which AWS service is SPECIFICALLY designed for this use case?
A retail company runs Black Friday at 50x normal traffic for 6 hours. The rest of the year traffic is steady. Which EC2 pricing COMBINATION is most cost-effective?
A company wants a script to run automatically when Auto Scaling launches new EC2 instances — configuring the application before it serves traffic. Which EC2 feature is DESIGNED for this?
A company needs to store 10 TB accessed only 3 times per year. Cost is the priority; 12-hour retrieval is acceptable. Which storage class is MOST cost-effective?
Which Auto Scaling policy IMMEDIATELY launches instances at a SPECIFIC TIME — for example, scaling up 15 minutes before a product launch at 9 AM Monday?
A company wants to migrate RDS PostgreSQL to Aurora PostgreSQL with MINIMAL DOWNTIME. Which approach achieves this?
What is the PRIMARY BENEFIT of using Amazon CloudFront with an S3 origin?
A company wants ECS container tasks to write logs to CloudWatch Logs automatically. Which configuration achieves this?
Lambda functions invoked from SQS are sometimes processing the same message twice. What is the ROOT CAUSE?
Which CloudWatch metric indicates an EC2 instance has hardware or OS issues?
Marketing team's large analytical DynamoDB queries are slowing production OLTP. What is the RECOMMENDED SOLUTION?
Which Route 53 routing policy, combined with health checks, provides AUTOMATIC FAILOVER from primary to secondary Region?
An order message arrives at 9 AM but should not be processed until 9:15 AM. Which SQS feature enables this?
Company wants Kubernetes pods to scale based on CPU utilization. Which Kubernetes feature manages this on EKS?
A company builds a serverless IoT application. Events from sensors trigger Lambda → DynamoDB + SNS notifications. Which service CONNECTS IoT devices to AWS?
A Spot instance receives a 2-minute interruption notice. What should the application do?
What does Amazon CloudWatch Application Signals provide?
A company has raw JSON in S3 that needs to be CONVERTED TO PARQUET for efficient Athena queries. Which Glue component performs this?
A company sends messages to an SQS FIFO queue but receives: "AWS.SimpleQueueService.MessageGroupIdNotIncluded." What is the cause?
A company needs to migrate 100 TB from on-premises NAS to S3 within 2 weeks. Their internet is 100 Mbps shared with business traffic. Which approach is BEST?
Which SQS metric helps detect that messages are sitting unprocessed for too long — indicating consumer processing issues?
A company needs RPO=15 minutes and RTO=1 hour for disaster recovery. Which DR strategy MOST cost-effectively meets these requirements?
A company uses Amplify for their mobile app backend and wants a GraphQL API with real-time data sync across devices. Which service provides this?
After deploying a new version with CodeDeploy, a critical bug is found. Which capability enables IMMEDIATE ROLLBACK?
A company's Kinesis Data Streams write throughput exceeds current capacity. Which operation INCREASES shard count?
What is the MODERN AWS ALTERNATIVE to bastion hosts that requires NO OPEN INBOUND SSH PORTS?
A company builds a podcast generation tool that converts articles to audio. Which AWS AI service provides text-to-speech?
Which TWO changes REDUCE NAT GATEWAY COSTS for traffic to AWS services?
A CloudFront-cached S3 profile picture is stale after an update. What is the CORRECT fix?
A company wants one reusable VPC CloudFormation template for dev, staging, and prod environments. Which approach achieves this?
After a production incident, the DBA needs to restore RDS to 4:32 PM yesterday to recover from accidental data deletion. Which feature enables this?
Lambda functions accumulate CloudWatch Logs with no retention policy, causing high storage costs. What is the MOST COST-EFFECTIVE solution?
VPC-A peers with VPC-B. VPC-B peers with VPC-C. Can VPC-A communicate with VPC-C?
A company wants to SUPPRESS CloudWatch alarms during a planned maintenance window (2-4 AM Saturday) to prevent false alert noise. Which approach enables this?
A company runs main application containers with logging sidecars in ECS. Which ECS configuration places multiple containers in the same task?
A company evaluates Aurora Serverless v2 for variable-traffic production. Which statement is CORRECT?
Lambda must process a 5 GB S3 file within a 15-minute timeout. /tmp is 10 GB. What is the CORRECT approach for efficient processing?
A company wants to find the SLOWEST API REQUESTS in their ALB access logs using CloudWatch Logs Insights. Which query achieves this?
A company wants employees to ask natural language questions like "how do I reset my password?" and get answers from their knowledge base. Which service is PURPOSE-BUILT for this?
During a scale-in event, Auto Scaling must let the application FINISH IN-FLIGHT REQUESTS before terminating instances. Which feature enables graceful shutdown?
A company wants to REDUCE Lambda invocations for frequently requested, slow-changing API data. Which API Gateway feature reduces Lambda invocations?
A company wants to track SOFTWARE VERSIONS on all EC2 instances to ensure only approved software is running. Which Systems Manager feature provides this?
A Java build takes 20 minutes mostly downloading Maven dependencies. Which CodeBuild feature reduces build time?
A company wants Lambda to process SQS messages in BATCHES OF 100 but only INVOKE Lambda when at least 50 MESSAGES are available. Which ESM setting enables this?
Multiple applications connect to the same MySQL RDS database with short-lived connections, frequently hitting MAX CONNECTIONS. Which service solves this?
A company has 5 separate alarms (CPU, memory, disk, network, app errors). They want ONE alarm that fires if ANY single metric is unhealthy. Which CloudWatch feature implements this?
Before CloudFormation deployment, the company wants to AUTOMATICALLY SCAN TEMPLATES for security misconfigurations in their CI/CD pipeline. Which approach achieves this?
Users navigate to `/dashboard/reports` on a React SPA hosted on S3 + CloudFront and receive 403 errors. What is the CORRECT CloudFront configuration?
During Auto Scaling scale-out, instances should launch in the AZ with FEWEST INSTANCES for even distribution. Which Auto Scaling behavior provides this?
An ECS Fargate container has a memory leak — memory grows until OOM crash. Which approach mitigates the impact in production?
A company has a business-critical application that must remain available even if an entire AWS Region becomes unavailable. Which architecture approach addresses this?
Which statement about the AWS global infrastructure is CORRECT?
Which of the following is the BEST description of "loose coupling" as an architecture principle in AWS?
A company is planning a migration. Some legacy applications use proprietary licenses that cannot run in a virtualized environment. Which AWS option BEST serves this requirement?
A company hosts a static website on EC2 with an Elastic Load Balancer. They want to reduce cost and operational overhead. What is the MOST appropriate migration?
Which AWS service provides a managed REDIS or MEMCACHED in-memory data store?
An application generates 10 GB of log files daily. These logs need to be analyzed within seconds of generation. Which combination is MOST appropriate?
What is the key difference between Amazon CloudWatch METRICS and Amazon CloudWatch LOGS?
Which service allows you to run containerized BATCH COMPUTING workloads at any scale without managing a cluster?
Which Amazon RDS feature automatically distributes READ traffic across multiple database copies to improve performance?
What problem does Amazon RDS PROXY solve?
A company wants to store their Terraform state file in a centralized location accessible by all team members, with state locking to prevent concurrent modifications. Which AWS services support this?
Which AWS service provides a MANAGED APACHE AIRFLOW environment for orchestrating data pipelines?
Which AWS service enables REAL-TIME bidirectional communication between a server and browser clients (WebSocket)?
Which AWS service provides a FULLY MANAGED graph database compatible with open-source graph frameworks like Apache TinkerPop and SPARQL?
Which of the following describes Amazon Kinesis Data FIREHOSE (as distinct from Kinesis Data STREAMS)?
A company wants to detect when their AWS infrastructure DRIFTS from the expected CloudFormation template state (i.e., someone manually changed a resource outside of CloudFormation). Which CloudFormation feature detects this?
Which AWS service provides a MANAGED SEARCH ENGINE with full-text search, filtering, and faceted navigation — commonly used for e-commerce product search?
A company has thousands of IoT devices sending temperature readings every second. Which AWS service is BEST for ingesting this high-volume time-series data?
A company wants to build a recommendation engine using ML. They have no ML expertise. Which AWS service provides PRE-BUILT recommendation model capabilities?
Which of the following statements about AWS Lambda CONCURRENCY is CORRECT?
Which AWS service provides a SERVERLESS, event-driven compute service that runs code in response to changes in DynamoDB tables?
A company wants to run their existing on-premises VMware workloads on AWS without any modification. Which service enables this?
Amazon Lightsail is BEST described as:
Which AWS service would a company use to automatically FORECAST future demand based on historical time-series data (e.g., predict next month's product sales)?
What is the MAIN use case for AWS Snowball Edge (compared to AWS Snowball)?
Which metric does AWS use to calculate your Savings Plans discount?
A company has EC2 instances that run 24/7 for 3 years. They also have development instances that run only 8 hours a day, 5 days a week. What is the CORRECT purchasing strategy?
An application running in a private subnet needs to access S3 without traversing the public internet. What is the MOST secure and cost-effective solution?
A company is evaluating moving from a traditional RDBMS to DynamoDB. Which characteristic of their workload makes DynamoDB the WRONG choice?
Which AWS service provides a MANAGED CONTACT CENTER solution with AI-powered features like voice menus, chat, and analytics?
Which AWS service provides a FULLY MANAGED service for running APACHE KAFKA workloads with automatic scaling?
A company needs to search and analyze terabytes of log data stored in S3 using SQL without setting up any servers. Which is the MOST cost-effective approach?
What is the purpose of an EC2 "placement group" with the SPREAD strategy?
Which AWS service provides a MANAGED DOCUMENT MANAGEMENT and CONTENT COLLABORATION platform?
Which of the following CORRECTLY describes the "pay for what you use" pricing model in contrast to traditional IT?
A company wants to process images stored in S3 and store the results in DynamoDB using a fully serverless architecture. Which workflow is CORRECT?
What is the difference between Amazon WorkSpaces and Amazon AppStream 2.0?
Which AWS service enables PREDICTIVE SCALING that forecasts future capacity needs using ML based on historical CloudWatch data?
A company runs a media streaming service. They want to ensure viewers in South America experience the same quality as viewers in North America. Which combination is MOST effective?
Which of the following is an example of VERTICAL SCALING on AWS?
A company needs a database for their e-commerce platform that handles unpredictable spikes (Black Friday), requires single-digit millisecond latency, and needs to scale to millions of requests per second. Which service is MOST appropriate?
Which AWS service provides a POINT-IN-TIME RECOVERY feature for databases, allowing restoration to any second within the retention period?
A company is running a multi-tier web application. They want to decouple the web tier from the processing tier so that if the processing tier becomes slow, the web tier continues to accept requests. What should they place between the tiers?
What does "durability" mean in the context of Amazon S3?
Which AWS service would you use to create a VISUAL BUSINESS INTELLIGENCE dashboard from data in S3, RDS, or Redshift — without writing code?
A company needs their EC2 instances to communicate with each other using HIGH-SPEED NETWORKING with SINGLE-ROOT I/O VIRTUALIZATION (SR-IOV). Which EC2 feature provides this?
A company's application writes to an RDS database. During peak periods, write performance degrades. Which approach CORRECTLY addresses write performance?
Which AWS service allows you to send TRANSACTIONAL SMS messages and push notifications to mobile devices?
Which service can be used to migrate an on-premises database to Amazon RDS?
Which service can be used to migrate exabytes of data into the AWS Cloud?
Which service can be used to quickly and affordably migrate 50TB of data to Amazon S3 for a company with a slow Internet connection?
How can a company migrate a database from Amazon EC2 to RDS without downtime?
A company recorded some support call conversations in mp4 files. How can the company extract the audio into a text document?
An application is being built that needs to identify faces in images. Which service can be used?