🎯 DVA-C02 Free Practice Exam

DVA-C02 Mock Exam Questions (Page 1 of 3)

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1. Question #1Domain 1

   A developer is building a serverless API backed by Amazon DynamoDB. They need to efficiently retrieve items by a composite key. Which DynamoDB key type allows queries on both partition key and sort key?

   AGlobal Secondary Index

   BLocal Secondary Index

   CComposite primary key (partition key + sort key)

   DScan operation with filter
2. Question #2Domain 1

   A developer needs event-driven communication between microservices. When a new order is placed, multiple downstream services (inventory, billing, shipping) must all be notified. Which AWS pattern is most appropriate?

   AAmazon SQS FIFO queue with a single consumer

   BAmazon SNS topic with multiple SQS subscriptions

   CAmazon EventBridge with a single target

   DAWS Step Functions with parallel states
3. Question #3Domain 1

   A developer is building a mobile app backend using API Gateway and Lambda. They want to cache frequently accessed API responses to reduce Lambda invocations and latency. Which feature should they enable?

   ALambda Provisioned Concurrency

   BAPI Gateway Usage Plans

   CAPI Gateway Caching

   DLambda Reserved Concurrency
4. Question #4Domain 1

   A development team needs to maintain session state for a web application deployed across multiple EC2 instances behind a load balancer. Which service provides a centralized, low-latency session store?

   AAmazon DynamoDB

   BAmazon ElastiCache (Redis)

   CAmazon RDS

   DAWS Systems Manager Parameter Store
5. Question #5Domain 1

   A developer wants to trigger a Lambda function whenever a new object is uploaded to a specific S3 prefix. Which Lambda configuration enables this?

   ALambda Destinations

   BLambda Layers

   CS3 Event Notification

   DLambda Dead Letter Queue
6. Question #6Domain 1

   A developer needs to call multiple AWS services from within a Lambda function using temporary credentials without hardcoding access keys. Which approach follows AWS best practices?

   AStore credentials in Lambda environment variables

   BEmbed credentials in the deployment package

   CAssign an IAM execution role to the Lambda function

   DUse AWS Secrets Manager with hardcoded ARN in code
7. Question #7Domain 2

   A developer stores database passwords and API keys. They need these values to be encrypted, automatically rotated, and retrieved by Lambda at runtime. Which service is most appropriate?

   AAWS Systems Manager Parameter Store (Standard)

   BAWS Secrets Manager

   CAWS KMS Key Store

   DLambda Environment Variables with encryption helpers
8. Question #8Domain 2

   A company uses Amazon Cognito to authenticate users. After signing in, users need to access S3 and DynamoDB with permissions scoped to their own data. Which Cognito feature provides temporary AWS credentials based on user identity?

   ACognito User Pools

   BCognito Identity Pools (Federated Identities)

   CCognito Hosted UI

   DCognito Lambda Triggers
9. Question #9Domain 2

   A developer creates a pre-signed URL to allow a partner to upload a large file to a private S3 bucket. The URL expires after 1 hour. What is the most important security consideration when generating this URL?

   AThe URL must use HTTP, not HTTPS

   BThe pre-signed URL inherits the permissions of the IAM identity that generated it

   CThe pre-signed URL bypasses all S3 bucket policies

   DPre-signed URLs cannot be created for upload operations
10. Question #10Domain 2

    A serverless application makes outbound API calls to third-party services. The security team wants these calls to originate from a fixed IP for IP allowlisting. Which architecture achieves this?

    AAssign an Elastic IP to the Lambda function

    BDeploy Lambda inside a VPC with a NAT Gateway attached to an Elastic IP

    CUse Lambda Reserved Concurrency to control outbound connections

    DConfigure a Lambda Alias with provisioned concurrency