AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 4)
developer is designing a serverless application for a game in which users register and log in through a web browser. The application makes requests on behalf of users to a set of AWS Lambda functions that un behind an Amazon API Gateway HTTP API.
rhe developer needs to implement a solution to register and log in users on the application's sign-in page. The solution must minimize operational overhead and must minimize ongoing management of user identities.
Which solution will meet these requirements?

1. A. Create Amazon Cognito user pools for external social identity provider
2. B. Configure 1AM roles for the identity pools.
3. C. Program the sign-in page to create users' 1AM groups with the 1AM roles attached to the groups.
4. D. Create an Amazon RDS for SQL Server DB instance to store the users and manage the permissions to the backend resources in AWS.
5. E. Configure the sign-in page to register and store the users and their passwords in an Amazon DynamoDB table with an attached 1AM policy.

Correct Answer: A

- (Exam Topic 3)
A developer is creating a role to access Amazon S3 buckets To create the role, the developer uses the AWS CLI create-role command. Which policy should be added to allow the Amazon EC2 service to assume the role?

1. A. Managed policy
2. B. Trust policy
3. C. Inline policy
4. D. Service control policy (SCP)

Correct Answer: B
A JSON policy document in which you define the principals that you trust to assume the role. A role trust policy is a required resource-based policy that is attached to a role in IAM. The principals that you can specify in the trust policy include users, roles, accounts, and services. https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_terms-and-concepts.html

- (Exam Topic 3)
A developer is building a backend system for the long-term storage of information from an inventory management system. The information needs to be stored so that other teams can build tools to report and analyze the data
How should the developer implement this solution to achieve the FASTEST running time?

1. A. Create an AWS Lambda function that writes to Amazon S3 synchronously Increase the function's concurrency to match the highest expected value of concurrent scans and requests.
2. B. Create an AWS Lambda function that writes to Amazon S3 asynchronously Configure a dead-letter queue to collect unsuccessful invocations
3. C. Create an AWS Lambda function that writes to Amazon S3 synchronously Set the inventory system to retry failed requests.
4. D. Create an AWS Lambda function that writes to an Amazon ElastiCache for Redis cluster asynchronously Configure a dead-letter queue to collect unsuccessful invocations.

Correct Answer: A

- (Exam Topic 2)
A Developer wants to encrypt new objects that are being uploaded to an Amazon S3 bucket by an application. There must be an audit trail of who has used the key during this process. There should be no change to the performance of the application.
Which type of encryption meets these requirements?

1. A. Server-side encryption using S3-managed keys
2. B. Server-side encryption with AWS KMS-managed keys
3. C. Client-side encryption with a client-side symmetric master key
4. D. Client-side encryption with AWS KMS-managed keys

Correct Answer: B

- (Exam Topic 1)
An existing serverless application processes uploaded image files. The process currently uses a single Lambda function that takes an image file, performs the processing, and stores the file in Amazon S3. Users of the application now require thumbnail generation of the images. Users want to avoid any impact to the time it takes to perform the image uploads.
How can thumbnail generation be added to the application, meeting user requirements while minimizing changes to existing code?

1. A. Change the existing Lambda function handling the uploads to create thumbnails at the time of upload.Have the function store both the image and thumbnail in Amazon S3.
2. B. Create a second Lambda function that handles thumbnail generation and storag
3. C. Change the existing Lambda function to invoke it asynchronously.
4. D. Create an S3 event notification with a Lambda function destinatio
5. E. Create a new Lambda function to generate and store thumbnails.
6. F. Create an S3 event notification to an SQS Queu
7. G. Create a scheduled Lambda function that processes the queue, and generates and stores thumbnails.

Correct Answer: C
https://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.html