AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 2)
AWS CodeBuild builds code for an application, creates the Docker image, pushes the image to Amazon
Elastic Container Registry (Amazon ECR), and tags the image with a unique identifier.
If the Developers already have AWS CLI configured on their workstations, how can the Docker images be pulled to the workstations?

1. A. Run the following:docker pull REPOSITORY URI : TAG
2. B. Run the output of the following:aws ecr get-loginand then run:docker pull REPOSITORY URI : TAG
3. C. Run the following:aws ecr get-loginand then run:docker pull REPOSITORY URI : TAG
4. D. Run the output of the following:aws ecr get-download-url-for-layerand then run:docker pull REPOSITORY URI : TAG

Correct Answer: B
https://docs.aws.amazon.com/cli/latest/reference/ecr/get-login.html

- (Exam Topic 4)
A company hosts a monolithic application on Amazon EC2 instances. The company starts converting some features of the application to a serverless architecture by using Amazon API Gateway and AWS Lambda After the migration, some users report problems with payment processing
Upon inspection, a developer discovers that the Lambda function that calls the external payment API is taking longer than expected Therefore, the API Gateway requests are timing out
What should the developer do to resolve this issue in the serverless architecture?

1. A. Use the EC2 instances to make the API calls to the payment API
2. B. Use Amazon Simple Queue Service (Amazon SQS) with API Gateway and the Lambda function to asynchronously call the payment API
3. C. Increase the API Gateway timeout duration to match the payment API time
4. D. Increase the Lambda function's memory to increase the network bandwidth and increase the speed of the payment API calls

Correct Answer: B

- (Exam Topic 1)
An application stores payroll information nightly in DynamoDB for a large number of employees across hundreds of offices. Item attributes consist of individual name, office identifier, and cumulative daily hours. Managers run reports for ranges of names working in their office. One query is. "Return all Items in this office for names starting with A through E".
Which table configuration will result in the lowest impact on provisioned throughput for this query?

1. A. Configure the table to have a hash index on the name attribute, and a range index on the office identifier
2. B. Configure the table to have a range index on the name attribute, and a hash index on the office identifier
3. C. Configure a hash index on the name attribute and no range index
4. D. Configure a hash index on the office Identifier attribute and no range index

Correct Answer: B
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.html
Partition key and sort key – Referred to as a composite primary key, this type of key is composed of two attributes. The first attribute is the partition key, and the second attribute is the sort key. DynamoDB uses the partition key value as input to an internal hash function. The output from the hash function determines the partition (physical storage internal to DynamoDB) in which the item will be stored. All items with the same partition key value are stored together, in sorted order by sort key value.

- (Exam Topic 1)
Which EC2 API call would you use to retrieve a list of Amazon Machine Images (AMIs)?

1. A. DescnbeInstances
2. B. DescribeAMls
3. C. DescribeImages
4. D. GetAMls
5. E. You cannot retrieve a list of AMIs as there are over 10,000 AMIs

Correct Answer: C
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeImages.html
Describes the specified images (AMIs, AKIs, and ARIs) available to you or all of the images available to you.

- (Exam Topic 1)
When a Simple Queue Service message triggers a task that takes 5 minutes to complete, which process below will result in successful processing of the message and remove it from the queue while minimizing the chances of duplicate processing?

1. A. Retrieve the message with an increased visibility timeout, process the message, delete the message from the queue
2. B. Retrieve the message with an increased visibility timeout, delete the message from the queue, process the message
3. C. Retrieve the message with increased DelaySeconds, process the message, delete the message from the queue
4. D. Retrieve the message with increased DelaySeconds, delete the message from the queue, process the message

Correct Answer: A
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-visibility-timeout.html