Free Amazon DVA-C02 Exam Questions

Question 1

A company has an application that uses an AWS Lambda function to process data. A developer must implement encryption in transit for all sensitive configuration data, such as API keys, that is stored in the application. The developer creates an AWS Key Management Service (AWS KMS) customer managed key.

What should the developer do next to meet the encryption requirement?

A : Create parameters of the String type in AWS Systems Manager Parameter Store. For each parameter, specify the KMS key ID to encrypt the parameter in transit. Reference the GetParameter API call in the Lambda environment variables.

B : Create secrets in AWS Secrets Manager by using the customer managed KMS key. Create a new Lambda function and set up a Lambda layer. Configure the Lambda layer to retrieve the values from Secrets Manager.

C : Create objects in Amazon S3 for each sensitive data field. Specify the customer managed KMS key to encrypt the object. Configure the Lambda function to retrieve the objects from Amazon S3 during data processing.

D : Create encrypted Lambda environment variables. Specify the customer managed KMS key to encrypt the variables. Enable encryption helpers for encryption in transit. Grant permission to the Lambda function's execution role to access the KMS key.

Answer: B

Question 2

A company is planning to use AWS CodeDeploy to deploy a new AWS Lambda function

What are the MINIMUM properties required in the 'resources' section of the AppSpec file for CodeDeploy to deploy the function successfully?

A : kDefinition, PlatformVersion, and ContainerName

B : me, alias, PlatformVersion, and type

C : me, alias, currentversion, and targetversion

D : kDefinition, LoadBalancerInfo, and ContainerPort

Answer: C

Question 3

An application collects data from sensors in a manufacturing facility. The data is stored in an Amazon SQS Standard queue by an AWS Lambda function and an Amazon EC2 instance processes the data and stores it in an Amazon RedShift data warehouse. A fault in the sensors’ software is causing occasional duplicate messages to be sent. Timestamps on the duplicate messages show they are generated within a few seconds of the primary message.

How can a Developer prevent duplicate data being stored in the data warehouse?

A : a FIFO queue and configure the Lambda function to add a message group ID to the messages generated by each individual sensor

B : nd a ChangeMessageVisibility call with VisibilityTimeout set to 30 seconds after the receipt of every message from the queue

C : nfigure a redrive policy, specify a destination Dead-Letter queue, and set the maxReceiveCount to 1

D : a FIFO queue and configure the Lambda function to add a message deduplication token to the message body

Answer: D

Question 4

A Developer wants the ability to roll back to a previous version of an AWS Lambda function in the event of errors caused by a new deployment.

How can the Developer achieve this with MINIMAL impact on users?

A : ange the application to use the $LATEST version. Update and save code. If too many errors are encountered, modify and save the code

B : ange the application to use an alias that points to the current version. Deploy the new version of the code. Update the alias to use the newly deployed version. If too many errors are encountered, point the alias back to the previous version

C : ange the application to use an alias that points to the current version. Deploy the new version of the code. Update the alias to direct 10% of users to the newly deployed version. If too many errors are encountered, send 100% of traffic to the previous version

D : ange the application to use a version ARN that points to the latest published version. Deploy the new version of the code. Update the application to point to the ARN of the new version of the code. If too many errors are encountered, point the application back to the ARN of the previous version

Answer: C

Question 5

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