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The AWS Certified Developer - Associate exam covers a wide range of topics, including AWS core services such as EC2, S3, and RDS, as well as AWS deployment and management tools such as Elastic Beanstalk, CloudFormation, and CodeDeploy. DVA-C02 Exam also covers topics such as application development, security, and troubleshooting, ensuring that the candidate has a deep understanding of how to design, develop, and deploy secure and scalable applications on AWS.

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Amazon AWS Certified Developer - Associate Sample Questions (Q215-Q220):

NEW QUESTION # 215
A company has an application that uses an Amazon S3 bucket for object storage. A developer needs to configure in-transit encryption for the S3 bucket. All the S3 objects containing personal data needs to be encrypted at rest with AWS KMS keys, which can be rotated on demand. Which combination of steps will meet these requirements? (Choose two.)

A. Write an S3 bucket policy to allow only encrypted connections over HTTPS by using the aws:SecureTransport condition.
B. Configure the application to encrypt the objects by using an AWS KMS customer managed key before uploading the objects containing personal data to Amazon S3.
C. Configure an S3 bucket policy to enable client-side encryption for the objects containing personal data by using an AWS KMS customer managed key
D. Write an S3 bucket policy to allow only encrypted connections over HTTPS by using permissions boundary.
E. Configure S3 Block Public Access settings for the S3 bucket to allow only encrypted connections over HTTPS.

Answer: A,B

NEW QUESTION # 216
A social media application is experiencing high volumes of new user requests after a recent marketing campaign. The application is served by an Amazon RDS for MySQL instance. A solutions architect examines the database performance and notices high CPU usage and many "too many connections" errors that lead to failed requests on the database. The solutions architect needs to address the failed requests.
Which solution will meet this requirement?

A. Deploy an Amazon ElastiCache (Redis OSS) cluster. Configure the application to use the ElastiCache cluster.
B. Migrate the database to an Amazon RDS for PostgreSQL instance.
C. Deploy an Amazon DynamoDB Accelerator (DAX) cluster. Configure the application to use the DAX cluster.
D. Deploy an RDS Proxy. Configure the application to use the RDS Proxy.

Answer: D

Explanation:
* Why Option B is Correct:RDS Proxy manages database connections efficiently, reducing overhead on the RDS instance and mitigating "too many connections" errors.
* Why Other Options are Incorrect:
* Option A: DAX is for DynamoDB, not RDS.
* Option C: Migration to PostgreSQL does not address the current issue.
* Option D: ElastiCache is useful for caching but does not solve connection pool issues.
* AWS Documentation References:
* Amazon RDS Proxy

NEW QUESTION # 217
A company is concerned that a malicious user could deploy unauthorized changes to the code for an AWS Lambda function. What can a developer do to ensure that only trusted code is deployed to Lambda?

A. Link Lambda to AWS KMS in the Lambda console. Use AWS KMS to digitally sign the Lambda package before deploying the package to Lambda.
B. Set the KmsKeyArn property of the Lambda function to the Amazon Resource Name (ARN) of a trusted key before deploying the package to Lambda.
C. Turn on the trusted code option in AWS CodeDeploy. Add the CodeDeploy digital certificate to the Lambda package before deploying the package to Lambda.
D. Define the code signing configuration in the Lambda console. Use AWS Signer to digitally sign the Lambda package before deploying the package to Lambda.

Answer: D

Explanation:
Requirement Summary:
* Prevent unauthorized code changes in AWS Lambda
* Ensure only trusted code is deployed
AWS Lambda supports Code Signing:
* You can configure code signing in Lambda using AWS Signer
* Packages must be digitally signed and verified against the signing profile
* Rejects unauthorized/modified packages automatically
Evaluate Options:
A). Trusted code option in CodeDeploy
* No such feature exists for Lambda
* CodeDeploy is more for EC2/On-Prem/Containers, not Lambda code signing B). Define code signing config + use AWS Signer
* This is exactly how AWS enforces trusted code deployment
* Attach a code signing configuration to the Lambda function
* Use AWS Signer to digitally sign deployment packages
C). Link to KMS to sign code
* KMS is not used to sign Lambda packages
* KMS is for data encryption, not application code integrity
D). Set KmsKeyArn
* This configures data encryption, not code signing
* Lambda code signing: https://docs.aws.amazon.com/lambda/latest/dg/configuration-codesigning.html
* AWS Signer overview: https://docs.aws.amazon.com/signer/latest/developerguide/what-is-signer.html

NEW QUESTION # 218
A company hosts a stateless web application with low data storage in a single AWS Region. The company wants to increase the resiliency of the application to include a multi-Region presence.
The company wants to set the recovery time objective (RTO) and recovery point objective (RPO) to hours. The company needs a low-cost and low-complexity disaster recovery (DR) strategy.
Which DR strategy should the company use?

A. Multi-site active-active
B. Warm standby
C. Pilot light
D. Backup and restore

Answer: C

Explanation:
The pilot light strategy keeps a minimal version of the environment in another Region and scales up during a disaster. It achieves an RTO and RPO of hours at a low cost and complexity.

NEW QUESTION # 219
A developer is updating an Amazon API Gateway REST API to have a mock endpoint. The developer wants to update the integration request mapping template so the endpoint will respond to mock integration requests with specific HTTP status codes based on various conditions.

A. { if( $input.path("integration") ) "statusCode": 200 else "statusCode":404 end }
B. { if( $input.params('integration') == "mock" ) "statusCode": 404 else "statusCode": 500 end }
C. { if( $input.params('scope') == "internal" ) "statusCode": 200 else "statusCode": 500 end }
D. { if( $context.integration.status ) "statusCode": 200 else "statusCode": 500 end }

Answer: D

Explanation:
Comprehensive Detailed Step by Step Explanation with All AWS Developer References:
In this scenario, the developer is configuring a mock integration in API Gateway. The integration request mapping template allows you to map the incoming request data to a format that the API expects. For mock integration, it's common to return specific HTTP status codes based on the conditions.
* Using $context.integration.status: The $context.integration.status variable refers to the status of the API Gateway integration, which is useful for generating responses based on the condition. OptionD correctly uses this variable to determine the HTTP status code, returning 200 for a successful mock request or 500 for a failure.
* Alternatives:
* Options A, B, and C do not use the correct context variables for handling mock integrations.
These options would not return the correct status codes based on the actual integration status.

NEW QUESTION # 220
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