AWS Certified Developer Associate Sample Test

1. Question

Category: CDA – Development with AWS Services

A mobile game is using a DynamoDB table named GameScore that keeps track of users and scores. Each item in the table is identified by a partition key (UserId) and a sort key (GameTitle). The diagram below shows how the items in the table are organized:

A developer wants to write a leaderboard application to display the top scores for each game.

How can the developer meet the requirement in the MOST efficient manner?

Create a global secondary index. Assign the GameTitle attribute as the partition key and the TopScore attribute as the sort key.
Create a local secondary index. Assign the TopScore attribute as the partition key and the GameTitle attribute as the sort key.
Create a local secondary index. Assign the GameTitle attribute as the partition key and the TopScore attribute as the sort key.
Use the Scan operation and filter the results based on a GameTitle value.

2. Question

Category: CDA – Deployment

A developer is instructed to set up a new serverless architecture composed of AWS Lambda, API Gateway, and DynamoDB in a single stack. The new architecture should allow the developer to locally build, test, and debug serverless applications.

Which of the following should the developer use to satisfy the above requirement?

AWS Serverless Application Model (AWS SAM)
CloudFormation
OpsWorks
Elastic Beanstalk

3. Question

Category: CDA – Security

A developer is working on an application that will process encrypted files. The application will use AWS KMS to decrypt the files locally before it can proceed with the processing of the files.

Which of the following are valid and secure steps in decrypting data? (Select TWO.)

Use the Decrypt operation to decrypt the plaintext data key.
Use the plaintext data key to decrypt data locally, then erase the encrypted data key from memory.
Use the encrypted data key to decrypt data locally, then erase the encrypted data key from memory.
Use the Decrypt operation to decrypt the encrypted data key.
Use the plaintext data key to decrypt data locally, then erase the plaintext data key from memory.

4. Question

Category: CDA – Development with AWS Services

Your Lambda function initializes a lot of external dependencies such as database connections and HTTP endpoints, which are required for data processing. It also fetches static data with a size of 20 MB from a third-party provider over the Internet every time the function is invoked. This adds significant time in the total processing, which greatly affects the performance of their serverless application.

Which of the following should you do to improve the performance of your function?

Use unreserved concurrency for your function.
Allocate more memory to your function.
Increase the CPU allocation of the function by submitting a service limit increase ticket to AWS.
Store the external files in the /tmp directory of the execution context which you can reuse for succeeding invocations.

AWS Certified Developer Associate Sample Test

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