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Amazon AWS Certified Developer - Associate Sample Questions (Q40-Q45):

NEW QUESTION # 40
An application is using Amazon Cognito user pools and identity pools for secure access. A developer wants to integrate the user-specific file upload and download features in the application with Amazon S3. The developer must ensure that the files are saved and retrieved in a secure manner and that users can access only their own files. The file sizes range from 3 KB to 300 MB.
Which option will meet these requirements with the HIGHEST level of security?

• A. Use an IAM policy within the Amazon Cognito identity prefix to restrict users to use their own folders in Amazon S3.
• B. Save the details of the uploaded files in a separate Amazon DynamoDB table. Filter the list of files in the user interface (UI) by comparing the current user ID with the user ID associated with the file in the table.
• C. Use S3 Event Notifications to validate the file upload and download requests and update the user interface (UI).
• D. Use Amazon API Gateway and an AWS Lambda function to upload and download files. Validate each request in the Lambda function before performing the requested operation.

Answer: A
NEW QUESTION # 41
A company is using an AWS Lambda function to process records from an Amazon Kinesis data stream. The company recently observed slow processing of the records. A developer notices that the iterator age metric for the function is increasing and that the Lambda run duration is constantly above normal.
Which actions should the developer take to increase the processing speed? (Choose two.)

• A. Increase the memory that is allocated to the Lambda function.
• B. Increase the number of shards of the Kinesis data stream.
• C. Increase the timeout of the Lambda function.
• D. Decrease the timeout of the Lambda function.
• E. Decrease the number of shards of the Kinesis data stream.

Answer: A,B
NEW QUESTION # 42
A developer needs to perform geographic load testing of an API. The developer must deploy resources to multiple AWS Regions to support the load testing of the API.
How can the developer meet these requirements without additional application code?

• A. Create an AWS CloudFormation template that defines the load test resources. Use the AWS CLI create-stack-set command to create a stack set in the desired Regions.
• B. Create an AWS Systems Manager document that defines the resources. Use the document to create the resources in the desired Regions.
• C. Create an AWS CloudFormation template that defines the load test resources. Use the AWS CLI deploy command to create a stack from the template in each Region.
• D. Create and deploy an AWS Lambda function in each desired Region. Configure the Lambda function to create a stack from an AWS CloudFormation template in that Region when the function is invoked.

Answer: A
NEW QUESTION # 43
A developer maintains an Amazon API Gateway REST API. Customers use the API through a frontend UI and Amazon Cognito authentication.
The developer has a new version of the API that contains new endpoints and backward-incompatible interface changes. The developer needs to provide beta access to other developers on the team without affecting customers.
Which solution will meet these requirements with the LEAST operational overhead?

• A. Define a new API Gateway API that points to the new API application code. Instruct the other developers to point the endpoints to the new API.
• B. Define a development stage on the API Gateway API. Instruct the other developers to point the endpoints to the development stage.
• C. Specify new API Gateway endpoints for the API endpoints that the developer wants to add.
• D. Implement a query parameter in the API application code that determines which code version to call.

Answer: B
NEW QUESTION # 44
A developer has an application that stores data in an Amazon S3 bucket. The application uses an HTTP API to store and retrieve objects. When the PutObject API operation adds objects to the S3 bucket the developer must encrypt these objects at rest by using server-side encryption with Amazon S3 managed keys (SSE-S3).
Which solution will meet this requirement?

• A. Apply TLS to encrypt the traffic to the S3 bucket.
• B. Create an AWS Key Management Service (AWS KMS) key. Assign the KMS key to the S3 bucket.
• C. Set the x-amz-server-side-encryption header when invoking the PutObject API operation.
• D. Provide the encryption key in the HTTP header of every request.

Answer: C
NEW QUESTION # 45
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