Question 1

A developer is creating a new REST API by using Amazon API Gateway and AWS Lambda. The development team tests the API and validates responses for the known use cases before deploying the API to the production environment. The developer wants to make the REST API available for testing by using API Gateway locally. Which AWS Serverless Application Model Command Line Interface (AWS SAM CLI) subcommand will meet these requirements?

Options :

A : Sam local invoke

B : Sam local generate-event

C : Sam local start-lambda

D : Sam local start-api

Answer: D

Question 2

A developer has created an Amazon API Gateway with caching enabled in front of AWS Lambda. For some requests, it is necessary to ensure the latest data is received from the endpoint. How can the developer ensure the data is not stale?

Options :

A : The cache must be disabled

B : Modify the TTL on the cache to a lower number

C : Send requests with the Cache-Control: max-age=0 header

D : Send requests with the Cache-Delete: max-age=0 header

Answer: C

Question 3

A Development team is creating a microservices application running on Amazon ECS. The release process workflow of the application requires a manual approval step before the code is deployed into the production environment.

What is the BEST way to achieve this using AWS CodePipeline?

Options :

A : Disable a stage just prior the deployment stage

B : Use an Amazon SNS notification from the deployment stage

C : Disable the stage transition to allow manual approval

D : Use an approval action in a stage before deployment

Answer: D

Question 4

A developer is creating an AWS Lambda function that consumes messages from an Amazon Simple Queue Service (Amazon SQS) standard queue. The developer notices that the Lambda function processes some messages multiple times.

How should developer resolve this issue MOST cost-effectively?

Options :

A : Change the Amazon SQS standard queue to an Amazon SQS FIFO queue by using the Amazon SQS message deduplication ID.

B : Set up a dead-letter queue.

C : Set the maximum concurrency limit of the AWS Lambda function to 1.

D : Change the message processing to use Amazon Kinesis Data Streams instead of Amazon SQS.

Answer: A

Question 5

A developer is designing an AWS Lambda function that creates temporary files that are less than 10 MB during invocation. The temporary files will be accessed and modified multiple times during invocation. The developer has no need to save or retrieve these files in the future. Where should the temporary files be stored?

Options :

A : the /tmp directory

B : Amazon Elastic File System (Amazon EFS)

C : Amazon Elastic Block Store (Amazon EBS)

D : Amazon S3

Answer: A

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