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The AWS Certified Developer - Associate exam is the second level of certification in the AWS Developer track. It is intended for individuals who have a minimum of one year of hands-on experience developing and maintaining AWS-based applications. DVA-C02 Exam is focused on testing the candidate's knowledge of AWS core services and their ability to develop and deploy scalable, highly available, and fault-tolerant applications on the AWS platform.
Amazon AWS Certified Developer - Associate Sample Questions (Q145-Q150):
NEW QUESTION # 145
A developer wants to add request validation to a production environment Amazon API Gateway API. The developer needs to test the changes before the API is deployed to the production environment. For the test, the developer will send test requests to the API through a testing tool.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: A
Explanation:
Amazon API Gateway allows you to create, deploy, and manage a RESTful API to expose backend HTTP endpoints, AWS Lambda functions, or other AWS services1. You can use API Gateway to perform basic validation of an API request before proceeding with the integration request1. When the validation fails, API Gateway immediately fails the request, returns a 400 error response to the caller, and publishes the validation results in CloudWatch Logs1.
To test changes before deploying to a production environment, you can modify the existing API to add request validation and deploy the updated API to a new API Gateway stage1. This allows you to perform tests without affecting the production environment. Once testing is complete and successful, you can then deploy the updated API to the API Gateway production stage1.
This approach has the least operational overhead as it avoids unnecessary creation of new APIs or exporting and importing of APIs. It leverages the existing infrastructure and only requires changes in the configuration of the existing API1.
NEW QUESTION # 146
A development team maintains a web application by using a single AWS CloudFormation template. The template defines web servers and an Amazon RDS database. The team uses the Cloud Formation template to deploy the Cloud Formation stack to different environments.
During a recent application deployment, a developer caused the primary development database to be dropped and recreated. The result of this incident was a loss of data. The team needs to avoid accidental database deletion in the future.
Which solutions will meet these requirements? (Choose two.)
Answer: C,D
Explanation:
Explanation
AWS CloudFormation is a service that enables developers to model and provision AWS resources using templates. The developer can add a CloudFormation Deletion Policy attribute with the Retain value to the database resource. This will prevent the database from being deleted when the stack is deleted or updated. The developer can also update the CloudFormation stack policy to prevent updates to the database. This will prevent accidental changes to the database configuration or properties.
References:
[What Is AWS CloudFormation? - AWS CloudFormation]
[DeletionPolicy Attribute - AWS CloudFormation]
[Protecting Resources During Stack Updates - AWS CloudFormation]
NEW QUESTION # 147
A company hosts its application on AWS. The application runs on an Amazon Elastic Container Service (Amazon ECS) cluster that uses AWS Fargate. The cluster runs behind an Application Load Balancer The application stores data in an Amazon Aurora database A developer encrypts and manages database credentials inside the application The company wants to use a more secure credential storage method and implement periodic credential rotation.
Which solution will meet these requirements with the LEAST operational overhead?
Answer: A
Explanation:
Explanation
AWS Secrets Manager is a service that helps you store, distribute, and rotate secrets securely. You can use Secrets Manager to migrate your credentials from your application code to a secure and encrypted storage.
You can also enable automatic rotation of your secrets by using AWS Lambda functions or custom logic. You can use IAM policies and roles to grant your Amazon ECS Fargate tasks permissions to access your secrets from Secrets Manager. This solution minimizes the operational overhead of managing your credentials and enhances the security of your application. References
* AWS Secrets Manager: Store, Distribute, and Rotate Credentials Securely | AWS News Blog
* Why You Should Audit and Rotate Your AWS Credentials Periodically - Cloud Academy
* Top 5 AWS root account best practices - TheServerSide
NEW QUESTION # 148
A company has an application that is hosted on Amazon EC2 instances The application stores objects in an Amazon S3 bucket and allows users to download objects from the S3 bucket A developer turns on S3 Block Public Access for the S3 bucket After this change, users report errors when they attempt to download objects The developer needs to implement a solution so that only users who are signed in to the application can access objects in the S3 bucket.
Which combination of steps will meet these requirements in the MOST secure way? (Select TWO.)
Answer: A,B
Explanation:
* IAM Roles for EC2 (A): The most secure way to provide AWS permissions from EC2.
* Create a role with a policy allowing s3:GetObject on the specific bucket.
* Attach the role to an instance profile and associate that profile with your instances.
* Pre-signed URLs (C): Temporary, authenticated URLs for specific S3 actions.
* Modify the app to use the AWS SDK to call GeneratePresignedUrl.
* Embed these URLs when a user is properly logged in, allowing download access.
References:
IAM Roles for EC2: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_use_switch-role-ec2.html Generating Presigned URLs: https://docs.aws.amazon.com/AmazonS3/latest/userguide
/ShareObjectPreSignedURL.htm
NEW QUESTION # 149
For a deployment using AWS Code Deploy, what is the run order of the hooks for in-place deployments?
Answer: C
Explanation:
For in-place deployments, AWS CodeDeploy uses a set of predefined hooks that run in a specific order during each deployment lifecycle event. The hooks are ApplicationStop, BeforeInstall, AfterInstall, ApplicationStart, and ValidateService. The run order of the hooks for in-place deployments is as follows:
ApplicationStop: This hook runs first on all instances and stops the current application that is running on the instances.
BeforeInstall: This hook runs after ApplicationStop on all instances and performs any tasks required before installing the new application revision.
AfterInstall: This hook runs after BeforeInstall on all instances and performs any tasks required after installing the new application revision.
ApplicationStart: This hook runs after AfterInstall on all instances and starts the new application that has been installed on the instances.
ValidateService: This hook runs last on all instances and verifies that the new application is running properly on the instances.
NEW QUESTION # 150
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