Amazon Web Services AWS Certified Associate DVA-C02 New Questions

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Question 48

A company runs continuous integration/continuous delivery (CI/CD) pipelines for its application on AWS CodePipeline. A developer must write unit tests and run them as part of the pipelines before staging the artifacts for testing.

How should the developer incorporate unit tests as part of CI/CD pipelines?

Options:

Create a separate CodePipeline pipeline to run unit tests.

Update the AWS CodeBuild build specification to include a phase for running unit tests.

Install the AWS CodeDeploy agent on an Amazon EC2 instance to run unit tests.

Create a testing branch in a git repository for the pipelines to run unit tests.

Question 49

A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.

To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.

What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?

Options:

Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.

Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.

Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.

Create a Content-MD5 header that provides a message integrity check for the central S3 bucket. Insert the Content-MD5 header for each web application request.

Question 50

A developer manages a website that distributes its content by using Amazon CloudFront. The website's static artifacts are stored in an Amazon S3 bucket.

The developer deploys some changes and can see the new artifacts in the S3 bucket. However, the changes do not appear on the webpage that the CloudFront distribution delivers.

How should the developer resolve this issue?

Options:

Configure S3 Object Lock to update to the latest version of the files every time an S3 object is updated.

Configure the S3 bucket to clear all old objects from the bucket before new artifacts are uploaded.

Set CloudFront to invalidate the cache after the artifacts have been deployed to Amazon S3.

Set CloudFront to modify the distribution origin after the artifacts have been deployed to Amazon S3.

Question 51

A developer is building a microservice that uses AWS Lambda to process messages from an Amazon Simple Queue Service (Amazon SQS) standard queue. The Lambda function calls external APIs to enrich the SOS message data before loading the data into an Amazon Redshift data warehouse. The SOS queue must handle a maximum of 1.000 messages per second.

During initial testing, the Lambda function repeatedly inserted duplicate data into the Amazon Redshift table. The duplicate data led to a problem with data analysis. All duplicate messages were submitted to the queue within 1 minute of each other.

How should the developer resolve this issue?