AMAZON DVA-C02 MARVELOUS VALID EXAM DUMPS

Amazon DVA-C02 Marvelous Valid Exam Dumps

Amazon DVA-C02 Marvelous Valid Exam Dumps

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Amazon AWS Certified Developer - Associate Sample Questions (Q38-Q43):

NEW QUESTION # 38
A company uses Amazon API Gateway to expose a set of APIs to customers. The APIs have caching enabled in API Gateway. Customers need a way to invalidate the cache for each API when they test the API.
What should a developer do to give customers the ability to invalidate the API cache?

  • A. Ask the customers to use the AWS SDK API Gateway class to invoke the InvalidateCache API operation.
  • B. Attach an InvalidateCache policy to the IAM execution role that the customers use to invoke the API. Ask the customers to add the INVALIDATE_CACHE query string parameter when they make an API call.
  • C. Ask the customers to use AWS credentials to call the InvalidateCache API operation.
  • D. Attach an InvalidateCache policy to the IAM execution role that the customers use to invoke the API. Ask the customers to send a request that contains the Cache-Control:max-age=0 HTTP header when they make an API call.

Answer: D

Explanation:
https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-caching.html Invalidate an API Gateway Cache Entry A client of your API can invalidate an existing cache entry and reload it from the integration endpoint for individual requests. The client must send a request that contains the Cache-Control:
max-age=0 header. The client receives the response directly from the integration endpoint instead of the cache, provided that the client is authorized to do so. This replaces the existing cache entry with the new response, which is fetched from the integration endpoint.
To grant permission for a client, attach a policy of the following format to an IAM execution role for the user.


NEW QUESTION # 39
A developer designed an application on an Amazon EC2 instance. The application makes API requests to objects in an Amazon S3 bucket.
Which combination of steps will ensure that the application makes the API requests in the MOST secure manner? (Choose two.)

  • A. Create an IAM role that has permissions to the S3 bucket.
  • B. Add the IAM role to an instance profile. Attach the instance profile to the EC2 instance.
  • C. Create an IAM user that has permissions to the S3 bucket. Add the user to an IAM group.
  • D. Create an IAM role that has permissions to the S3 bucket. Assign the role to an IAM group.
  • E. Store the credentials of the IAM user in the environment variables on the EC2 instance.

Answer: A,B


NEW QUESTION # 40
A developer has observed an increase in bugs in the AWS Lambda functions that a development team has deployed in its Node is application. To minimize these bugs, the developer wants to impendent automated testing of Lambda functions in an environment that Closely simulates the Lambda environment.
The developer needs to give other developers the ability to run the tests locally. The developer also needs to integrate the tests into the team's continuous integration and continuous delivery (Ct/CO) pipeline before the AWS Cloud Development Kit (AWS COK) deployment.
Which solution will meet these requirements?

  • A. Create sample events based on the Lambda documentation. Create a Docker container from the Node is base image to invoke the Lambda functions. Check the response Document how to run the Docker container for the more developers on the team update the CI/CD pipeline to run the Docker container.
  • B. Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response Document the test scripts for the other developers on the team Update the CI/CD pipeline to run the test scripts.
  • C. Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda Documentation Invoke the handler function by using a unit testing framework. Check the response Document how to run the unit testing framework for the other developers on the team. Update the OCD pipeline to run the unit testing framework.
  • D. Install the AWS Serverless Application Model (AWS SAW) CLI tool Use the Sam local generate-event command to generate sample events for me automated tests. Create automated test scripts that use the Sam local invoke command to invoke the Lambda functions. Check the response Document the test scripts tor the other developers on the team Update the CI/CD pipeline to run the test scripts.

Answer: D

Explanation:
This solution will meet the requirements by using AWS SAM CLI tool, which is a command line tool that lets developers locally build, test, debug, and deploy serverless applications defined by AWS SAM templates. The developer can use sam local generate-event command to generate sample events for different event sources such as API Gateway or S3. The developer can create automated test scripts that use sam local invoke command to invoke Lambda functions locally in an environment that closely simulates Lambda environment. The developer can check the response from Lambda functions and document how to run the test scripts for other developers on the team. The developer can also update CI/CD pipeline to run these test scripts before deploying with AWS CDK. Option A is not optimal because it will use cdk local invoke command, which does not exist in AWS CDK CLI tool. Option B is not optimal because it will use a unit testing framework that reproduces Lambda execution environment, which may not be accurate or consistent with Lambda environment. Option D is not optimal because it will create a Docker container from Node.js base image to invoke Lambda functions, which may introduce additional overhead and complexity for creating and running Docker containers.


NEW QUESTION # 41
A developer is using AWS CodeDeploy to automate a company's application deployments to Amazon EC2.
Which application specification file properties are required to ensure the software deployments do not fail? (Select TWO.)

  • A. The file must be stored in Amazon S3 and referenced from the application's source code.
  • B. The file must be a JSON-formatted file named appspec.json.
  • C. The file must be stored in AWS CodeBuild and referenced from the application's source code.
  • D. The file must be a YAML-formatted file named appspec.yml.
  • E. The file must be placed in the root of the directory structure of the application's source code.

Answer: D,E

Explanation:
Comprehensive and Detailed Step-by-Step
To ensure successful software deployments using AWS CodeDeploy, the application specification file (appspec.yml or appspec.json) must adhere to specific requirements:
File Format Requirement (Option B):
The appspec.yml file is a YAML-formatted file required for defining deployment actions and file locations. This is the modern and recommended format for application specification files.
It can also be a JSON-formatted file named appspec.json, but YAML is most commonly used and accepted.
File Placement Requirement (Option D):
The application specification file must reside in the root directory of the application's source code. This is necessary so that AWS CodeDeploy can detect and use the file during deployment.
Incorrect Options:
Option A: While a JSON-formatted file (appspec.json) is valid, this is not a mandatory requirement. YAML is also acceptable, and this option does not account for it.
Option C: The application specification file is not required to be stored in AWS CodeBuild; it must be included in the source code's directory structure.
Option E: The application specification file does not need to be stored in Amazon S3. S3 is commonly used for application artifacts, but the appspec.yml or appspec.json file must exist within the deployment package or source code root.
Reference:
AWS CodeDeploy User Guide: Application Specification File


NEW QUESTION # 42
A developer is creating a mobile application that will not require users to log in.
What is the MOST efficient method to grant users access to AWS resources?

  • A. Create an AWS Lambda function to create an IAM user when a user accesses the application.
  • B. Use an identity provider to securely authenticate with the application.
  • C. Use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources.
  • D. Create credentials using AWS KMS and apply these credentials to users when using the application.

Answer: C

Explanation:
https://docs.aws.amazon.com/cognito/latest/developerguide/iam-roles.html


NEW QUESTION # 43
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