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Free Amazon Web Services DVA-C02 Practice Exam with Questions & Answers | Set: 10

Questions 91

A data visualization company wants to strengthen the security of its core applications The applications are deployed on AWS across its development staging, pre-production, and production environments. The company needs to encrypt all of its stored sensitive credentials The sensitive credentials need to be automatically rotated Aversion of the sensitive credentials need to be stored for each environment

Which solution will meet these requirements in the MOST operationally efficient way?

Options:
A.

Configure AWS Secrets Manager versions to store different copies of the same credentials across multiple environments

B.

Create a new parameter version in AWS Systems Manager Parameter Store for each environment Store the environment-specific credentials in the parameter version.

C.

Configure the environment variables in the application code Use different names for each environment type

D.

Configure AWS Secrets Manager to create a new secret for each environment type. Store the environment-specific credentials in the secret

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Questions 92

A developer has created a large AWS Lambda function. Deployment of the function Is failing because of an InvalidParameterValueException error. The error message indicates that the unzipped size of the function exceeds the maximum supported value.

Which actions can the developer take to resolve this error? (Select TWO.)

Options:
A.

Submit a quota increase request to AWS Support to increase the function to the required size.

B.

Use a compression algorithm that is more efficient than ZIP.

C.

Break up the function into multiple smaller functions.

D.

Zip the .zip file twice to compress the file more.

E.

Move common libraries, function dependencies, and custom runtimes into Lambda layers.

Questions 93

A company uses AWS X-Ray to monitor a serverless application. The components of the application have different request rates. The user interactions and transactions are important to trace, but they are low in volume. The background processes such as application health checks, polling, and connection maintenance generate high volumes of read-only requests.

Currently, the default X-Ray sampling rules are universal for all requests. Only the first request per second and some additional requests are recorded. This setup is not helping the company review the requests based on service or request type.

A developer must configure rules to trace requests based on service or request properties. The developer must trace the user interactions and transactions without wasting effort recording minor background tasks.

Which solution will meet these requirements?

Options:
A.

Disable sampling for high-volume read-only requests. Sample at a lower rate for all requests that handle user interactions or transactions.

B.

Disable sampling and trace all requests for requests that handle user interactions or transactions. Sample high-volume read-only requests at a higher rate.

C.

Disable sampling and trace all requests for requests that handle user interactions or transactions. Sample high-volume read-only requests at a lower rate.

D.

Disable sampling for high-volume read-only requests. Sample at a higher rate for all requests that handle user interactions or transactions.

Questions 94

A company has a web application that runs on Amazon EC2 instances with a custom Amazon Machine Image (AMI) The company uses AWS CloudFormation to provision the application The application runs in the us-east-1 Region, and the company needs to deploy the application to the us-west-1 Region

An attempt to create the AWS CloudFormation stack in us-west-1 fails. An error message states that the AMI ID does not exist. A developer must resolve this error with a solution that uses the least amount of operational overhead

Which solution meets these requirements?

Options:
A.

Change the AWS CloudFormation templates for us-east-1 and us-west-1 to use an AWS AMI. Relaunch the stack for both Regions.

B.

Copy the custom AMI from us-east-1 to us-west-1. Update the AWS CloudFormation template for us-west-1 to refer to AMI ID for the copied AMI Relaunch the stack

C.

Build the custom AMI in us-west-1 Create a new AWS CloudFormation template to launch the stack in us-west-1 with the new AMI ID

D.

Manually deploy the application outside AWS CloudFormation in us-west-1.

Questions 95

A company has developed an application that uses AWS Lambda functions to process messages from an Amazon SQS queue. One of the Lambda functions makes a call to an external API that is expected to encounter temporary service unavailability.

A developer needs to configure the function to retry failed messages from an Amazon SQS dead-letter queue. The developer notices that the Lambda function is re-processing some messages in the queue more than once.

Which solution will resolve this issue?

Options:
A.

Set a message retention period for each message. Configure the Lambda function to add a MessageId to each message.

B.

Set the visibility timeout parameter at the queue level. Configure the Lambda function to delete processed messages from the queue.

C.

Set a receive message wait time for each message. Configure the Lambda function to add a MessageId to each message.

D.

Set the delivery delay parameter at the queue level. Configure the Lambda function to delete processed messages from the queue.

Questions 96

A company is offering APIs as a service over the internet to provide unauthenticated read access to statistical information that is updated daily. The company uses Amazon API Gateway and AWS Lambda to develop the APIs. The service has become popular, and the company wants to enhance the responsiveness of the APIs.

Which action can help the company achieve this goal?

Options:
A.

Enable API caching in API Gateway.

B.

Configure API Gateway to use an interface VPC endpoint.

C.

Enable cross-origin resource sharing (CORS) for the APIs.

D.

Configure usage plans and API keys in API Gateway.

Questions 97

A developer created an AWS Lambda function that accesses resources in a VPC. The Lambda function polls an Amazon Simple Queue Service (Amazon SOS) queue for new messages through a VPC endpoint. Then the function calculates a rolling average of the numeric values that are contained in the messages. After initial tests of the Lambda function, the developer found that the value of the rolling average that the function returned was not accurate.

How can the developer ensure that the function calculates an accurate rolling average?

Options:
A.

Set the function's reserved concurrency to 1. Calculate the rolling average in the function. Store the calculated rolling average in Amazon ElastiCache.

B.

Modify the function to store the values in Amazon ElastiCache. When the function initializes, use the previous values from the cache to calculate the rolling average.

C.

Set the function's provisioned concurrency to 1. Calculate the rolling average in the function. Store the calculated rolling average in Amazon ElastiCache.

D.

Modify the function to store the values in the function's layers. When the function initializes, use the previously stored values to calculate the rolling average.

Questions 98

A company uses an AWS Lambda function to transfer files from an Amazon S3 bucket to the company's SFTP server. The Lambda function connects to the SFTP server by using credentials such as username and password. The company uses Lambda environment variables to store these credentials.

A developer needs to implement encrypted username and password credentials.

Which solution will meet these requirements?

Options:
A.

Remove the user credentials from the Lambda environment. Implement 1AM database authentication.

B.

Move the user credentials from Lambda environment variables to AWS Systems Manager Parameter Store.

C.

Move the user credentials from Lambda environment variables to AWS Key Management Service (AWS KMS).

D.

Move the user credentials from the Lambda environment to an encrypted .txt file. Store the file in an S3 bucket.

Questions 99

A developer maintains a critical business application that uses Amazon DynamoDB as the primary data store The DynamoDB table contains millions of documents and receives 30-60 requests each minute The developer needs to perform processing in near-real time on the documents when they are added or updated in the DynamoDB table

How can the developer implement this feature with the LEAST amount of change to the existing application code?

Options:
A.

Set up a cron job on an Amazon EC2 instance Run a script every hour to query the table for changes and process the documents

B.

Enable a DynamoDB stream on the table Invoke an AWS Lambda function to process the documents.

C.

Update the application to send a PutEvents request to Amazon EventBridge. Create an EventBridge rule to invoke an AWS Lambda function to process the documents.

D.

Update the application to synchronously process the documents directly after the DynamoDB write

Questions 100

A developer is building a serverless application by using AWS Serverless Application Model (AWS SAM) on multiple AWS Lambda functions. When the application is deployed, the developer wants to shift 10% of the traffic to the new deployment of the application for the first 10 minutes after deployment. If there are no issues, all traffic must switch over to the new version.

Which change to the AWS SAM template will meet these requirements?

Options:
A.

Set the Deployment Preference Type to Canaryl OPercent10Minutes. Set the AutoPublishAlias property to the Lambda alias.

B.

Set the Deployment Preference Type to Linearl OPercentEveryIOMinutes. Set AutoPubIishAIias property to the Lambda alias.

C.

Set the Deployment Preference Type to Canaryl OPercentIOMinutes. Set the PreTraffic and PostTraffic properties to the Lambda alias.

D.

Set the Deployment Preference Type to Linearl OPercentEvery10Minutes. Set PreTraffic and PostTraffic properties to the Lambda alias.

Exam Code: DVA-C02
Certification Provider: Amazon Web Services
Exam Name: AWS Certified Developer - Associate
Last Update: Jul 15, 2025
Questions: 368

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