Free Amazon DVA-C02 Exam Questions

Question 1

A developer is using AWS Amplify Hosting to build and deploy an application. The developer is receiving anincreased number of bug reports from users. The developer wants to add end-to-end testing to the applicationto eliminate as many bugs as possible before the bugs reach production.Which solution should the developer implement to meet these requirements?

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 theAmplify 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.

Answer: C

Question 2

A developer is working on an app for a company that uses an Amazon DynamoDB table named Orders tostore customer orders. The table uses OrderlD as the partition key and there is no sort key. The table containsmore than 100,000 records. The developer needs to add a functionality that will retrieve all Orders recordsthat contain an OrderSource attribute with the MobileApp value.Which solution will improve the user experience in the MOST efficient way?

A : Perform a Scan operation on the Orders table. Provide a QueryFilter condition to filter to only the itemswhere the OrderSource attribute is equal to the MobileApp value.

B : Create a local secondary index (LSI) with OrderSource as the partition key. Perform a Query operationby using MobileApp as the key.

C : Create a global secondary index (GSI) with OrderSource as the sort key. Perform a Query operation byusing MobileApp as the key.

D : Create a global secondary index (GSI) with OrderSource as the partition key. Perform a Queryoperation by using MobileApp as the key.

Answer: D

Question 3

An application that is deployed to Amazon EC2 is using Amazon DynamoDB. The app cation calls theDynamoDB REST API Periodically the application receives a ProvisionedThroughputExceededExceptionerror when the application writes to a DynamoDB table.Which solutions will mitigate this error MOST cost-effectively^ (Select TWO)

A : Modify the application code to perform exponential back off when the error is received.

B : Modify the application to use the AWS SDKs for DynamoDB.

C : Increase the read and write throughput of the DynamoDB table.

D : Create a DynamoDB Accelerator (DAX) cluster for the DynamoDB table.

E : Create a second DynamoDB table Distribute the reads and writes between the two tables.

Answer: A,B

Question 4

A developer has created a large AWS Lambda function. Deployment of the function Is failing because of anInvalidParameterValueException error. The error message indicates that the unzipped size of the functionexceeds the maximum supported value.Which actions can the developer take to resolve this error? (Select TWO.)

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.

Answer: C,E

Question 5

An application needs to use the IP address of the client in its processing. The application has been moved into AWS and has been placed behind an Application Load Balancer (ALB). However, all the client IP addresses now appear to be the same. The application must maintain the ability to scale horizontally.

Based on this scenario, what is the MOST cost-effective solution to this problem?

A : Remove the application from the ALB. Delete the ALB and change Amazon Route 53 to direct traffic to the instance running the application.

B : Remove the application from the ALCreate a Classic Load Balancer in its place. Direct traffic to the application using the HTTP protocol.

C : Alter the application code to inspect the X-Forwarded-For header. Ensure that the code can work properly if a list of IP addresses is passed in the header.

D : Alter the application code to inspect a custom header. Alter the client code to pass the IP address in the custom header.

Answer: C