Free Amazon DVA-C02 Exam Questions

Question 1

A developer designed an application on an Amazon EC2 instance The application makes API requests to objects in an Amazon S3 bucket Which combination of steps will ensure that the application makes the API requests in the MOST secure manner? (Select TWO.)

A : Create an IAM user that has permissions to the S3 bucket. Add the user to an IAM group.

B : Create an IAM role that has permissions to the S3 bucket

C : Add the IAM role to an instance profile. Attach the instance profile to the EC2 instance.

D : Create an IAM role that has permissions to the S3 bucket. Assign the role to an IAM group.

E : Store the credentials of the IAM user in the environment variables on the EC2 instance.

Answer: B,C

Question 2

A Developer has deployed an application that runs on an Auto Scaling group of Amazon EC2 instances. The application data is stored in an Amazon DynamoDB table and records are constantly updated by all instances. An instance sometimes retrieves old data. The Developer wants to correct this by making sure the reads are strongly consistent.

How can the Developer accomplish this?

A : the GetShardIterator command

B : t consistency to strong when calling UpdateTable

C : t ConsistentRead to true when calling GetItem

D : eate a new DynamoDB Accelerator (DAX) table

Answer: C

Question 3

A developer is creating an application that uses an AWS Lambda function to transform and load data from an Amazon S3 bucket. When the developer tests the application, the developer finds that some invocations of the Lambda function are slower than others. The developer needs to update the Lambda function to have predictable invocation durations that run with low latency. Any initialization activities, such as loading libraries and instantiating clients, must run during allocation time rather than during actual function invocations. Which combination of steps will meet these requirements? (Select TWO.)

A : Create a schedule group in Amazon EventBridge Scheduler to invoke the Lambda function.

B : Configure provisioned concurrency for the Lambda function to have the necessary number of execution environments.

C : Use the SLATEST version of the Lambda function.

D : Configure reserved concurrency for the Lambda function to have the necessary number of execution environments.

E : Deploy changes, and publish a new version of the Lambda function.

Answer: B,D

Question 4

A company is adopting serverless computing for some of its new services. A development team needs to create a serverless infrastructure by using AWS Serverless Application Model (AWS SAM). All infrastructure must be deployed by using AWS CloudFormation templates.

What should the development team do to meet these requirements?

A : Add a Resources section to the CloudFormation templates that contains AWS::Lambda::Function resources.

B : Add a Mappings section to the CloudFormation templates that contains AWS::Serverless::Function and AWS::Serverless::API.

C : Add a Transform section to the CloudFormation templates. Use the AWS SAM syntax to define the resources.

D : Add a Parameters section to the CloudFormation templates that specifies the relevant AWS SAM Globals section.

Answer: D

Question 5

A company needs to package and deploy an application that uses AWS Lambda to compress and decompress video clips. The application uses a video codec library that is larger than 250 MB. The application uses the library to compress the videos before storage and to decompress the videos upon retrieval.

A : Create one Lambda function. Upload one zip file that contains code to handle video compression and decompression to the function. Include the codec library in the zip file

B : Create two Lambda functions. Upload one zip file that contains code to handle video compression to one function. Upload a second zip file that contains code for video decompression to the second function. Include the codec library in both zip files.

C : Create two Lambda functions. Upload one zip file that contains code to handle video compression to one function. Upload a second zip file that contains code for video decompression to the second function. Create one Lambda layer for the codec library. Add the layer to both functions.

D : Create two Lambda functions. Build one container image that contains code to handle video compression and a second image that contains video decompression code. Add the codec library to both images. Upload the images to Amazon ECR. Use the containers to create the Lambda functions.

Answer: D