AWS-Certified-Developer-Associate Free Practice Test

- (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%

- (Exam Topic 2)
Queries to an Amazon DynamoDB table are consuming a large amount of read capacity. The table has a significant number of large attributes. The application does not need all of the attribute data.
How can DynamoDB costs be minimized while maximizing application performance?

1. A. Batch all the writes, and perform the write operations when no or few reads are being performed.
2. B. Create a global secondary index with a minimum set of projected attributes.
3. C. Implement exponential backoffs in the application.
4. D. Load balance the reads to the table using an Application Load Balancer.

Correct Answer: C
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/query-api-troubleshooting.html