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Amazon Web Services Updated DVA-C02 Exam Questions and Answers by constance

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Amazon Web Services DVA-C02 Exam Overview :

Exam Name: AWS Certified Developer - Associate
Exam Code: DVA-C02 Dumps
Vendor: Amazon Web Services Certification: AWS Certified Associate
Questions: 344 Q&A's Shared By: constance
Question 8

A company has an application that is based on Amazon EC2. The company provides API access to the application through Amazon API Gateway and uses Amazon DynamoDB to store the application's data. A developer is investigating performance issues that are affecting the application. During peak usage, the application is overwhelmed by a large number of identical data read requests that come through APIs. What is the MOST operationally efficient way for the developer to improve the application's performance?

Options:

A.

Use DynamoDB Accelerator (DAX) to cache database responses.

B.

Configure Amazon EC2 Auto Scaling policies to meet fluctuating demand.

C.

Enable API Gateway caching to cache API responses.

D.

Use Amazon ElastiCache to cache application responses.

Discussion
Question 9

A developer is building a three-tier web application that should be able to handle a minimum of 5000 requests per minute. Requirements state that the web tier should be completely stateless while the application maintains session state for the users.

How can session data be externalized, keeping latency at the LOWEST possible value?

Options:

A.

Create an Amazon RDS instance, then implement session handling at the application level to leverage a database inside the RDS database instance for session data storage.

B.

Implement a shared file system solution across the underlying Amazon EC2 instances, then implement session handling at the application level to leverage the shared file system for session data storage.

C.

Create an Amazon ElastiCache (Memcached) cluster, then implement session handling at the application level to leverage the cluster for session data storage.

D.

Create an Amazon DynamoDB table, then implement session handling at the application level to leverage the table for session data storage.

Discussion
Question 10

A developer is using AWS Amplify Hosting to build and deploy an application. The developer is receiving an increased number of bug reports from users. The developer wants to add end-to-end testing to the application to eliminate as many bugs as possible before the bugs reach production.

Which solution should the developer implement to meet these requirements?

Options:

A.

Run the amplify add test command in the Amplify CLI.

B.

Create unit tests in the application. Deploy the unit tests by using the amplify push command in the Amplify CLI.

C.

Add a test phase to the amplify.yml build settings for the application.

D.

Add a test phase to the aws-exports.js file for the application.

Discussion
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Question 11

A company developed an API application on AWS by using Amazon CloudFront. Amazon API Gateway, and AWS Lambda. The API has a minimum of four requests every second A developer notices that many API users run the same query by using the POST method. The developer wants to cache the POST request to optimize the API resources.

Which solution will meet these requirements'?

Options:

A.

Configure the CloudFront cache Update the application to return cached content based upon the default request headers.

B.

Override the cache method in me selected stage of API Gateway Select the POST method.

C.

Save the latest request response in Lambda /tmp directory Update the Lambda function to check the /tmp directory

D.

Save the latest request m AWS Systems Manager Parameter Store Modify the Lambda function to take the latest request response from Parameter Store

Discussion
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