AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 2)
n on-premises application makes repeated calls to store files to Amazon S3. As usage of the application has increased, “LimitExceeded” errors are being logged.
What should be changed to fix this error?

1. A. Implement exponential backoffs in the application.
2. B. Load balance the application to multiple servers.
3. C. Move the application to Amazon EC2.
4. D. Add a one second delay to each API call.

Correct Answer: A

- (Exam Topic 4)
A developer runs an application that uses an Amazon API Gateway REST API. The developer needs to implement a solution to proactively monitor the health of both API responses and latencies in case a deployment causes a service disruption despite passing deployment pipeline tests. The solution also must check for endpoint vulnerability and unauthorized changes to APIs. URLs, and website content.
Which solution will meet these requirements?

1. A. Use the Amazon CloudWatch Synthetics canary functionality to call the API and check the responses and duration of the request.
2. B. Use a custom health check in the API that queries hosts to check the duration of the request.
3. C. Implement a custom AWS Lambda function with an Amazon EventBridge event to periodically call the API and check the responses and duration of the request.
4. D. Use the built-in API Gateway metrics to monitor the average duration of the API response.

Correct Answer: A

- (Exam Topic 2)
A Developer is writing an application that runs on Amazon EC2 instances in an Auto scaling group. 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?

1. A. Set consistentRead to true when calling Getitem.
2. B. Create a new DynamoDB Accelerator (DAX) table.
3. C. Set consistency to strong when calling Update Table.
4. D. Use the Getshardlterator command.

Correct Answer: B
Reference: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ HowItWorks.ReadConsistency.html

- (Exam Topic 1)
A Lambda function is packaged for deployment to multiple environments, including development, test, production, etc. Each environment has unique set of resources such as databases, etc.
How can the Lambda function use the resources for the current environment?

1. A. Apply tags to the Lambda functions.
2. B. Hardcore resources in the source code.
3. C. Use environment variables for the Lambda functions.
4. D. Use separate function for development and production.

Correct Answer: C

- (Exam Topic 1)
In a multi-container Docker environment in AWS Elastic Beanstalk, what is required to configure container instances in the environment?

1. A. An Amazon ECS task definition
2. B. An Amazon ECS cluster
3. C. A Docker in an application package
4. D. A CLI for Elastic Beanstalk

Correct Answer: A
Reference: https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker_ecs.html