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Amazon AWS Certified Developer - Associate Sample Questions (Q321-Q326):

NEW QUESTION # 321
A company has an application that runs as a series of AWS Lambda functions. Each Lambda function receives data from an Amazon Simple Notification Service (Amazon SNS) topic and writes the data to an Amazon Aurora DB instance.
To comply with an information security policy, the company must ensure that the Lambda functions all use a single securely encrypted database connection string to access Aurora.
Which solution will meet these requirements?

A. Use IAM database authentication for Aurora to enable secure database connections for all the Lambda functions.
B. Store the credentials and read the credentials from an encrypted Amazon RDS DB instance.
C. Use Lambda environment variables with a shared AWS Key Management Service (AWS KMS) key for encryption.
D. Store the credentials in AWS Systems Manager Parameter Store as a secure string parameter.

Answer: D

Explanation:
AWS Systems Manager Parameter Store offers a more centralized way to manage encrypted secrets across multiple services than Lambda environment variables, making it a better fit for this scenario.

NEW QUESTION # 322
A company uses more than 100 AWS Lambda functions to handle application services. One Lambda function is critical and must always run successfully. The company notices that occasionally, the critical Lambda function does not initiate. The company investigates the issue and discovers instances of the Lambda TooManyRequestsException: Rate Exceeded error in Amazon CloudWatch logs. Upon further review of the logs, the company notices that some of the non-critical functions run properly while the critical function fails. A developer must resolve the errors and ensure that the critical Lambda function runs successfully. Which solution will meet these requirements with the LEAST operational overhead?

A. Configure CloudWatch alarms for TooManyRequestsException errors. Add Amazon EventBridge as an action for the alarm state change. Use EventBridge to invoke the critical function again after a failure.
B. Configure CloudWatch alarms for TooManyRequestsException errors. Add the critical Lambda function as an alarm state change action to invoke the critical function again after a failure.
C. Configure provisioned concurrency for the critical Lambda function. Set provisioned concurrent executions to the appropriate level.
D. Configure reserved concurrency for the critical Lambda function. Set reserved concurrent executions to the appropriate level.

Answer: D

Explanation:
Reserved concurrency guarantees a specific number of concurrent executions for a critical Lambdafunction.
This ensures that the critical function always has sufficient resources to execute, even if other functions are consuming concurrency.
Why Option A:
* Ensures Function Availability: Reserved concurrency isolates the critical Lambda function from other functions.
* Low Overhead: Configuring reserved concurrency is straightforward and requires minimal setup.
Why Not Other Options:
* Option B: Provisioned concurrency is ideal for reducing cold starts, not for managing execution limits.
* Option C & D: Alarms and re-invocation mechanisms add complexity without resolving the root cause.

NEW QUESTION # 323
A developer is building an application that uses Amazon DynamoDB. The developer wants to retrieve multiple specific items from the database with a single API call. Which DynamoDB API call will meet these requirements with the MINIMUM impact on the database?

A. Scan
B. Query
C. Getltem
D. BatchGetltem

Answer: D

NEW QUESTION # 324
A company is building a content authoring application. The application has multiple user groups, such as content creator, reviewer, approver, and administrator. The company needs to assign users fine-grained permissions for specific parts of the application.
The company needs a solution to configure, maintain, and analyze user permissions. The company wants a solution that can be easily adapted to work with newer applications in the future. The company must use a third-party OpenID Connect (OIDC) identity provider (IdP) to authenticate users.

A. Configure the application to check user permissions upon request. Configure the application logic to manage user permissions.
B. Configure an Amazon Cognito identity pool for the application. Use the identity pool identities within the application to manage user permissions.
C. Set up an IAM role for each user group. Assign users appropriate IAM roles. Configure the application to determine appropriate permissions for each user based on the user's IAM role.
D. Use Amazon Verified Permissions to set up user permissions. Integrate Verified Permissions with a third-party IdP. Configure the application to request authorization decisions from Verified Permissions.

Answer: D

Explanation:
* Why Option C is Correct:Amazon Verified Permissions provides fine-grained access control capabilities, making it ideal for managing complex user permissions. It integrates with OIDC IdPs for authentication and allows applications to request authorization decisions dynamically. It is also easily adaptable to newer applications.
* Why Other Options are Incorrect:
* Option A: Cognito identity pools do not natively support fine-grained permission analysis or management.
* Option B: Managing permissions in application logic adds significant operational overhead.
* Option D: IAM roles are not designed for application-specific fine-grained access control and are more suitable for resource-level permissions.
* AWS Documentation References:
* Amazon Verified Permissions

NEW QUESTION # 325
A company uses an AWS Lambda function to perform natural language processing (NLP) tasks.
The company has attached a Lambda layer to the function. The Lambda layer contain scientific libraries that the function uses during processing.
The company added a large, pre-trained text-classification model to the Lambda layer. The addition increased the size of the Lambda layer to 8.7 GB. After the addition and a recent deployment, the Lambda function returned a RequestEntityTooLargeException error. The company needs to update the Lambda function with a high-performing and portable solution to decrease the initialization time for the function.
Which solution will meet these requirements?

A. Create an Amazon EFS file system to store the large pre-trained model. Mount the file system to an Amazon EC2 instance. Configure the Lambda function to use the EFS file system.
B. Create a Docker container that includes the scientific libraries and the pre-trained model. Update the Lambda function to use the container image.
C. Split the components of the Lambda layer into five new Lambda layers. Zip the new layers, and attach the layers to the Lambda function. Update the function code to use the new layers.
D. Store the large pre-trained model in an Amazon S3 bucket. Use the AWS SDK to access the model.

Answer: B

NEW QUESTION # 326
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