AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 2)
A development team is working on a mobile app that allows users to upload pictures to Amazon S3 The team expects the app will be used by hundreds of thousands of users during a single event simultaneously Once the pictures are uploaded, the backend service will scan and parse the pictures for inappropriate content.
Which approach is the MOST resilient way to achieve this goal which also smooths out temporary volume spikes for the backend service?

1. A. Develop an AWS Lambda function to check the upload folder in the S3 bucke
2. B. If new uploaded pictures are detected, the Lambda function will scan and parse them
3. C. Once a picture is uploaded to Amazon S3: publish the event to an Amazon SQS queu
4. D. Use the queue as an event source to trigger an AWS Lambda function In the Lambda function scan and parse the picture.
5. E. When the user uploads a picture, invoke an API hosted in Amazon API Gatewa
6. F. The API will invoke an AWS Lambda function to scan and parse the picture
7. G. Create a state machine in AWS Step Functions to check the upload folder in the S3 bucke
8. H. If a new picture is detected, invoke an AWS Lambda function to scan and parse it.

Correct Answer: B

- (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