Amazon DVA-C02 Practice Tests | New Study DVA-C02 Questions

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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Security	26%	- Data security 1. Secure API access patterns 2. Encryption using AWS KMS - Application authentication and authorization 1. IAM roles and policies 2. Cognito user authentication
Troubleshooting and Optimization	18%	- Performance optimization 1. Fault tolerance and resilience patterns 2. Application performance tuning - Monitoring and logging 1. Amazon CloudWatch metrics and logs
Development with AWS Services	32%	- AWS core services development 1. Amazon DynamoDB integration patterns 2. AWS Lambda functions development 3. Amazon S3 usage in applications - Application development and integration 1. Event-driven architectures with SNS/SQS 2. API Gateway and REST APIs
Deployment	24%	- CI/CD and deployment strategies 1. AWS CodePipeline workflows 2. AWS CodeBuild and CodeDeploy usage - Infrastructure as code 1. AWS CloudFormation templates

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Amazon AWS Certified Developer - Associate Sample Questions (Q149-Q154):

NEW QUESTION # 149
A developer is creating an AWS Lambda function that needs network access to private resources in a VPC.
Which solution will provide this access with the LEAST operational overhead?

A. Configure a VPC endpoint connection for the Lambda function. Set up the VPC endpoint to route traffic through a NAT gateway.
B. Attach the Lambda function to the VPC through private subnets. Create a security group that allows network access to the private resources.
Associate the security group with the Lambda function.
C. Configure an AWS PrivateLink endpoint for the private resources. Configure the Lambda function to reference the PrivateLink endpoint.
D. Configure the Lambda function to route traffic through a VPN connection. Create a security group that allows network access to the private resources. Associate the security group with the Lambda function.

Answer: B

NEW QUESTION # 150
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? (Choose two.)

A. Create an EC2 instance profile and role with an appropriate policy. Associate the role with the EC2 instances.
B. Modify the application to use the S3 GeneratePresignedUrl API call.
C. Modify the application to delegate requests to the S3 bucket.
D. Create an IAM user with an appropriate policy. Store the access key ID and secret access key on the EC2 instances.
E. Modify the application to use the S3 GetObject API call and to return the object handle to the user.

Answer: A,B

NEW QUESTION # 151
A developer uses AWS CloudFormation to deploy an Amazon API Gateway API and an AWS Step Functions state machine. The state machine must reference the API Gateway API after the CloudFormation template is deployed. The developer needs a solution that uses the state machine to reference the API Gateway endpoint.
Which solution will meet these requirements MOST cost-effectively?

A. Configure the CloudFormation template to store the API endpoint in a standard AWS::AppConfig::ConfigurationProfile resource. Configure the state machine to reference the resource.
B. Configure the CloudFormation template to reference the API endpoint in the DefinitionSubstitutions property for the AWS::StepFunctions::StateMachine resource.
C. Configure the CloudFormation template to store the API endpoint in a standard AWS::SecretsManager::Secret resource. Configure the state machine to reference the resource.
D. Configure the CloudFormation template to store the API endpoint in an environment variable for the AWS::StepFunctions::StateMachine resource. Configure the state machine to reference the environment variable.

Answer: C

NEW QUESTION # 152
A developer is using an AWS account to build an application that stores files in an Amazon S3 bucket. Files must be encrypted at rest by AWS KMS keys. A second AWS account must have access to read files from the bucket.
The developer wants to minimize operational overhead for the application.
Which combination of solutions will meet these requirements? (Select TWO.)

A. Use a customer managed key to encrypt the files. Create a key policy that grants kms: Decrypt permissions to the second AWS account.
B. Create a gateway endpoint for the S3 bucket. Modify the endpoint policy to grant s3:GetObject permissions to the second AWS account.
C. Create a service control policy (SCP) that grants s3:GetObject permissions to the second AWS account.
D. Use an AWS managed key to encrypt the files. Create a key policy that grants kms:Decrypt permissions to the second AWS account.
E. Create a bucket policy for the S3 bucket that grants s3:GetObject permissions to the second AWS account.

Answer: A,E

Explanation:
Step-by-Step Breakdown:
Requirement Summary:
* Encrypt S3 objects usingKMS keys
* Cross-account read accessto another AWS account
* Minimize operational overhead
Option A: Use a customer managed key + key policy granting kms:Decrypt to second account
* #Correct: Customer managed keys allow full control ofkey policy.
* You can add a statement to allowcross-account accessusing the second account's IAM principal.
Option B: Use AWS managed key + key policy granting access to second account
* #Incorrect: AWS-managed KMS keys (aws/s3)cannot be modifiedto add cross-account access in key policies.
Option C: SCP that grants s3:GetObject to second account
* #Incorrect: SCPs are used torestrict or allow permissions across AWS Organizations, not togrant S3 or KMS accessdirectly.
Option D: Create a bucket policy granting s3:GetObject to second account
* #Correct: Bucket policies can grantcross-account accessto specific IAM users or roles in the second account.
Option E: Gateway endpoint for S3 with cross-account access
* #Incorrect: Gateway endpoints only applywithin the same VPC/account. Cross-account use with endpoint policies is not the correct pattern for this use case.
* Cross-account S3 access with KMS:https://docs.aws.amazon.com/AmazonS3/latest/userguide/example- walkthroughs-managing-access-example2.html
* KMS cross-account key policy:https://docs.aws.amazon.com/kms/latest/developerguide/key-policy- modifying.html
* Bucket Policy for cross-account access:https://docs.aws.amazon.com/AmazonS3/latest/userguide
/example-bucket-policies.html

NEW QUESTION # 153
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?

A. Create a new API. Add the necessary resources and methods, including new request validation.
Perform the tests. Modify the existing API to add request validation. Deploy the existing API to production
B. Clone the existing API. Modify the new API to add request validation. Perform the tests. Modify the existing API to add request validation. Deploy the existing API to production.
C. Export the existing API to an OpenAPI file. Create a new API. Import the OpenAPI file. Modify the new API to add request validation. Perform the tests. Modify the existing API to add request validation. Deploy the existing API to production.
D. Modify the existing API to add request validation. Deploy the updated API to a new API Gateway stage. Perform the tests. Deploy the updated API to the API Gateway production stage.

Answer: D

Explanation:
In this option, you are making changes directly to the existing API, adding request validation.
Then, you deploy the updated API to a new API Gateway stage, which allows you to test the changes without affecting the production environment. After performing the tests and ensuring everything works as expected, you can then deploy the updated API to the production stage, thus minimizing operational overhead.

NEW QUESTION # 154
......

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