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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q50-Q55):

NEW QUESTION # 50

An application under development is required to store hundreds of video files. The data must be encrypted within the application prior to storage, with a unique key for each video file.

How should the Developer code the application?

A. Use a cryptography library to generate an encryption key for the application. Use the encryption key to encrypt the data. Store the encrypted data.
B. Upload the data to an S3 bucket using server side-encryption with an AWS KMS key.
C. Use the KMS GenerateDataKey API to get a data key. Encrypt the data with the data key. Store the encrypted data key and data.
D. Use the KMS Encrypt API to encrypt the data. Store the encrypted data key and data.

Answer: C

Explanation:

https://docs.aws.amazon.com/kms/latest/APIReference/API_GenerateDataKey.html

NEW QUESTION # 51

A developer is creating an application that will be deployed on IoT devices. The application will send data to a RESTful API that is deployed as an AWS Lambda function. The application will assign each API request a unique identifier. The volume of API requests from the application can randomly increase at any given time of day.

During periods of request throttling, the application might need to retry requests. The API must be able to handle duplicate requests without inconsistencies or data loss.

Which solution will meet these requirements?

A. Create an Amazon RDS for MySQL DB instance. Store the unique identifier for each request in a database table. Modify the Lambda function to check the table for the identifier before processing the request.
B. Create an Amazon DynamoDB table. Store the unique identifier for each request in the table. Modify the Lambda function to return a client error response when the function receives a duplicate request.
C. Create an Amazon ElastiCache for Memcached instance. Store the unique identifier for each request in the cache. Modify the Lambda function to check the cache for the identifier before processing the request.
D. Create an Amazon DynamoDB table. Store the unique identifier for each request in the table. Modify the Lambda function to check the table for the identifier before processing the request.

Answer: D

Explanation:

Amazon DynamoDB is a fully managed NoSQL database service that can store and retrieve any amount of data with high availability and performance. DynamoDB can handle concurrent requests from multiple IoT devices without throttling or data loss. To prevent duplicate requests from causing inconsistencies or data loss, the Lambda function can use DynamoDB conditional writes to check if the unique identifier for each request already exists in the table before processing the request. If the identifier exists, the function can skip or abort the request; otherwise, it can process the request and store the identifier in the table. Reference: Using conditional writes

NEW QUESTION # 52

A team of Developers must migrate an application running inside an AWS Elastic Beanstalk environment from a Classic Load Balancer to an Application Load Balancer.

Which steps should be taken to accomplish the task using the AWS Management Console?

A. 1. Create a new environment with the same configurations except for the load balancer type.2. Deploy the same application version as used in the original environment.3. Run the swap-environment-cnames action.
B. 1. Clone the existing environment, changing the associated load balancer type.2. Deploy the same application version as used in the original environment.3. Run the swap-environment-cnames action.
C. 1. Update the application code in the existing deployment.2. Select a new load balancer type before running the deployment.3. Deploy the new version of the application code to the environment.
D. 1. Edit the environment definitions in the existing deployment.2. Change the associated load balancer type according to the requirements.3. Rebuild the environment with the new load balancer type.

Answer: A

Explanation:

Explanation

https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.managing.elb.html By default, Elastic Beanstalk creates an Application Load Balancer for your environment when you enable load balancing with the Elastic Beanstalk console or the EB CLI. It configures the load balancer to listen for HTTP traffic on port 80 and forward this traffic to instances on the same port. You can choose the type of load balancer that your environment uses only during environment creation. Later, you can change settings to manage the behavior of your running environment's load balancer, but you can't change its type.

NEW QUESTION # 53

A company is using an Amazon API Gateway REST API endpoint as a webhook to publish events from an on-premises source control management (SCM) system to Amazon EventBridge. The company has configured an EventBridge rule to listen for the events and to control application deployment in a central AWS account. The company needs to receive the same events across multiple receiver AWS accounts.

How can a developer meet these requirements without changing the configuration of the SCM system?

A. Deploy the API Gateway REST API to all the receiver AWS accounts. Create as many SCM webhooks as the number of AWS accounts.
B. Convert the API Gateway type from REST API to HTTP API.
C. Grant permission to the central AWS account for EventBridge to access the receiver AWS accounts.
Add an EventBridge event bus on the receiver AWS accounts as the targets to the existing EventBridge rule.
D. Deploy the API Gateway REST API to all the required AWS accounts. Use the same custom domain name for all the gateway endpoints so that a single SCM webhook can be used for all events from all accounts.

Answer: C

NEW QUESTION # 54

A Developer is creating a Lambda function and will be using external libraries that are not included in the standard Lambda libraries.

What action would minimize the Lambda compute time consumed?

A. Install the dependencies and external libraries at the beginning of the Lambda function.
B. Install the external libraries in Lambda to be available to all Lambda functions.
C. Copy the external libraries to Amazon S3, and reference the external libraries to the S3 location.
D. Create a Lambda deployment package that includes the external libraries.

Answer: B

NEW QUESTION # 55

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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q50-Q55):

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