Amazon DVA-C02 Exam Actual Questions

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The questions for DVA-C02 were last updated on Sep 20, 2024.

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Question No. 1

A company has an analytics application that uses an AWS Lambda function to process transaction data asynchronously A developer notices that asynchronous invocations of the Lambda function sometimes fail When failed Lambda function invocations occur, the developer wants to invoke a second Lambda function to handle errors and log details.

Which solution will meet these requirements?

AConfigure a Lambda function destination with a failure condition Specify Lambda function as the destination type Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource

BEnable AWS X-Ray active tracing on the initial Lambda function. Configure X-Ray to capture stack traces of the failed invocations. Invoke the error-handling Lambda function by including the stack traces in the event object.

CConfigure a Lambda function trigger with a failure condition Specify Lambda function as the destination type Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource

DCreate a status check alarm on the initial Lambda function. Configure the alarm to invoke the error-handling Lambda function when the alarm is initiated. Ensure that the alarm passes the stack trace in the event object.

Show Answer

Correct Answer: A

Lambda Destinations on Failure:Allow routing asynchronous function invocations to specified resources (like another Lambda function) upon failure.

Error Handling:The error-handling Lambda receives details about the failure, enabling logging and custom actions.

Direct Integration:This solution leverages native Lambda functionality for a simpler implementation.

Question No. 2

A company is preparing to migrate an application to the company's first AWS environment Before this migration, a developer is creating a proof-of-concept application to validate a model for building and deploying container-based applications on AWS.

Which combination of steps should the developer take to deploy the containerized proof-of-concept application with the LEAST operational effort? (Select TWO.)

APackage the application into a zip file by using a command line tool Upload the package to Amazon S3

BPackage the application into a container image by using the Docker CLI. Upload the image to Amazon Elastic Container Registry (Amazon ECR)

CDeploy the application to an Amazon EC2 instance by using AWS CodeDeploy.

DDeploy the application to Amazon Elastic Kubernetes Service (Amazon EKS) on AWS Fargate

EDeploy the application to Amazon Elastic Container Service (Amazon ECS) on AWS Fargate

Show Answer

Correct Answer: B, E

Containerization:Packaging the application as a container image promotes portability and standardization. Docker is the standard tool for containerization.

Amazon ECR:ECR is a managed container registry designed to work seamlessly with AWS container services.

Fargate:ECS Fargate provides serverless container orchestration, minimizing operational overhead for this proof-of-concept.

Docker:https://www.docker.com/

Amazon ECR:https://aws.amazon.com/ecr/

Question No. 3

A company runs an application on AWS The application stores data in an Amazon DynamoDB table Some queries are taking a long time to run These slow queries involve an attribute that is not the table's partition key or sort key

The amount of data that the application stores in the DynamoDB table is expected to increase significantly. A developer must increase the performance of the queries.

Which solution will meet these requirements'?

AIncrease the page size for each request by setting the Limit parameter to be higher than the default value Configure the application to retry any request that exceeds the provisioned throughput.

BCreate a global secondary index (GSI). Set query attribute to be the partition key of the index

CPerform a parallel scan operation by issuing individual scan requests in the parameters specify the segment for the scan requests and the total number of segments for the parallel scan.

DTurn on read capacity auto scaling for the DynamoDB table. Increase the maximum read capacity units (RCUs).

Show Answer

Correct Answer: B

Global Secondary Index (GSI):GSIs enable alternative query patterns on a DynamoDB table by using different partition and sort keys.

Addressing Query Bottleneck:By making the slow-query attribute the GSI's partition key, you optimize queries on that attribute.

Scalability:GSIs automatically scale to handle increasing data volumes.

Amazon DynamoDB Global Secondary Indexes:https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GSI.html

Question No. 4

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?

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

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

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

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

Show Answer

Correct Answer: B

DynamoDB Streams:Capture near real-time changes to DynamoDB tables, triggering downstream actions.

Lambda for Processing:Lambda functions provide a serverless way to execute code in response to events like DynamoDB Stream updates.

Minimal Code Changes:This solution requires the least modifications to the existing application.

DynamoDB Streams:https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Streams.html

AWS Lambda:https://aws.amazon.com/lambda/

Question No. 5

A developer needs to build an AWS CloudFormation template that self-populates the AWS Region variable that deploys the CloudFormation template

What is the MOST operationally efficient way to determine the Region in which the template is being deployed?

AUse the AWS:.Region pseudo parameter

BRequire the Region as a CloudFormation parameter

CFind the Region from the AWS::Stackld pseudo parameter by using the Fn::Split intrinsic function

DDynamically import the Region by referencing the relevant parameter in AWS Systems Manager Parameter Store

Show Answer

Correct Answer: A

Pseudo Parameters:CloudFormation provides pseudo parameters that reference runtime context, including the current AWS Region.

Operational Efficiency:TheAWS::Regionpseudo parameter offers the most direct and self-contained way to obtain the Region dynamically within the template.

CloudFormation Pseudo Parameters:https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/pseudo-parameter-reference.html

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