AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 1)
An existing serverless application processes uploaded image files. The process currently uses a single Lambda function that takes an image file, performs the processing, and stores the file in Amazon S3. Users of the application now require thumbnail generation of the images. Users want to avoid any impact to the time it takes to perform the image uploads.
How can thumbnail generation be added to the application, meeting user requirements while minimizing changes to existing code?

1. A. Change the existing Lambda function handling the uploads to create thumbnails at the time of upload.Have the function store both the image and thumbnail in Amazon S3.
2. B. Create a second Lambda function that handles thumbnail generation and storag
3. C. Change the existing Lambda function to invoke it asynchronously.
4. D. Create an S3 event notification with a Lambda function destinatio
5. E. Create a new Lambda function to generate and store thumbnails.
6. F. Create an S3 event notification to an SQS Queu
7. G. Create a scheduled Lambda function that processes the queue, and generates and stores thumbnails.

Correct Answer: C
https://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.html

- (Exam Topic 1)
An application reads data from an Amazon DynamoDB table. Several times a day, for a period of 15 seconds, the application receives multiple ProvisionedThroughputExceeded errors.
How should this exception be handled?

1. A. Create a new global secondary index for the table to help with the additional requests.
2. B. Retry the failed read requests with exponential backoff.
3. C. Immediately retry the failed read requests.
4. D. Use the DynamoDB “UpdateItem” API to increase the provisioned throughput capacity of the table.

Correct Answer: B
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Programming.Errors.html

- (Exam Topic 1)
In DynamoDB, what type of HTTP response codes indicate that a problem was found with the client request sent to the service?

1. A. 5xx HTTP response code
2. B. 200 HTTP response code
3. C. 306 HTTP response code
4. D. 4xx HTTP response code

Correct Answer: D
https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html#ErrorCodeList

- (Exam Topic 2)
A developer is refactoring a monolithic application. The application takes a POST request and performs several operations. Some of the operations are in parallel while others run sequentially. These operations have been refactored into individual AWS Lambda functions. The POST request will be processed by Amazon API Gateway.
How should the developer invoke the Lambda functions in the same sequence using API Gateway*?

1. A. Use Amazon SQS to invoke the Lambda functions
2. B. Use an AWS Step Functions activity to run the Lambda functions
3. C. Use Amazon SNS to trigger the Lambda functions
4. D. Use an AWS Step Functions state machine to orchestrate the Lambda functions.

Correct Answer: A

- (Exam Topic 1)
A Developer is testing a Docker-based application that uses the AWS SDK to interact with Amazon DynamoDB. In the local development environment, the application has used IAM access keys. The application is now ready for deployment onto an ECS cluster.
How should the application authenticate with AWS services in production?

1. A. Configure an ECS task IAM role for the application to use
2. B. Refactor the application to call AWS STS AssumeRole based on an instance role
3. C. Configure AWS access key/secret access key environment variables with new credentials
4. D. Configure the credentials file with a new access key/secret access key

Correct Answer: A
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_IAM_role.html#:~:targetText=Amazon%