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DVA-C02 Exam Questions

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Question 1

A developer needs to write an AWS CloudFormation template on a local machine and deploy a CloudFormation stack to AWS.

What must the developer do to complete these tasks?

AInstall the AWS CLI. Configure the AWS CLI by using an I AM user name and password.

BInstall the AWS CLI. Configure the AWS CLI by using an SSH key.

CInstall the AWS CLI. Configure the AWS CLI by using an 1AM user access key and secret key.

DInstall an AWS software development kit (SDK). Configure the SDK by using an X.509 certificate.

Correct : C

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AInstall the AWS CLI. Configure the AWS CLI by using an I AM user name and password.

BInstall the AWS CLI. Configure the AWS CLI by using an SSH key.

CInstall the AWS CLI. Configure the AWS CLI by using an 1AM user access key and secret key.

DInstall an AWS software development kit (SDK). Configure the SDK by using an X.509 certificate.

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Question 2

A developer is building an application that includes an AWS Lambda function that is written in .NET Core. The Lambda function's code needs to interact with Amazon DynamoDB tables and Amazon S3 buckets. The developer must minimize the Lambda function's deployment time and invocation duration.

Which solution will meet these requirements?

AIncrease the Lambda function's memory.

BInclude the entire AWS SDK for .NET in the Lambda function's deployment package.

CInclude only the AWS SDK for .NET modules for DynamoDB and Amazon S3 in the Lambda function's deployment package.

DConfigure the Lambda function to download the AWS SDK for .NET from an S3 bucket at runtime.

Correct : C

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AIncrease the Lambda function's memory.

BInclude the entire AWS SDK for .NET in the Lambda function's deployment package.

CInclude only the AWS SDK for .NET modules for DynamoDB and Amazon S3 in the Lambda function's deployment package.

DConfigure the Lambda function to download the AWS SDK for .NET from an S3 bucket at runtime.

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Question 3

A developer is setting up a deployment pipeline. The pipeline includes an AWS CodeBuild build stage that requires access to a database to run integration tests. The developer is using a buildspec.yml file to configure the database connection. Company policy requires automatic rotation of all database credentials.

Which solution will handle the database credentials MOST securely?

ARetrieve the credentials from variables that are hardcoded in the buildspec.yml file. Configure an AWS Lambda function to rotate the credentials.

BRetrieve the credentials from an environment variable that is linked to a SecureString parameter in AWS Systems Manager Parameter Store. Configure Parameter Store for automatic rotation.

CRetrieve the credentials from an environment variable that is linked to an AWS Secrets Manager secret. Configure Secrets Manager for automatic
rotation.

DRetrieve the credentials from an environment variable that contains the connection string in plaintext. Configure an Amazon EventBridge event to rotate the credentials.

Correct : B

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ARetrieve the credentials from variables that are hardcoded in the buildspec.yml file. Configure an AWS Lambda function to rotate the credentials.

BRetrieve the credentials from an environment variable that is linked to a SecureString parameter in AWS Systems Manager Parameter Store. Configure Parameter Store for automatic rotation.

CRetrieve the credentials from an environment variable that is linked to an AWS Secrets Manager secret. Configure Secrets Manager for automatic
rotation.

DRetrieve the credentials from an environment variable that contains the connection string in plaintext. Configure an Amazon EventBridge event to rotate the credentials.

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Question 4

A developer is troubleshooting a three-tier application, which is deployed on Amazon EC2 instances. There is a connectivity problem between the application servers and the database servers.

Which AWS services or tools should be used to identify the faulty component? (Select TWO.)

AAWS CloudTrail

BAWS Trusted Advisor

CAmazon VPC Flow Logs

DNetwork access control lists

EAWS Config rules

Correct : C, D

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AAWS CloudTrail

BAWS Trusted Advisor

CAmazon VPC Flow Logs

DNetwork access control lists

EAWS Config rules

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Question 5

A developer is creating an AWS Lambda function that needs network access to private resources in a VPC.

AAttach 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.

BConfigure 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.

CConfigure a VPC endpoint connection for the Lambda function. Set up the VPC endpoint to route traffic through a NAT gateway.

DConfigure an AWS PrivateLink endpoint for the private resources. Configure the Lambda function to reference the PrivateLink endpoint.

Correct : A

Comprehensive Detailed Step by Step Explanation with All AWS Developer Reference:

When you need to provide an AWS Lambda function access to private resources in a VPC, the most common and straightforward approach is to attach the Lambda function to a VPC via private subnets. Once the Lambda function is associated with the VPC, you need to configure appropriate security groups to control the access to the private resources.

Lambda with VPC Access: Lambda functions can be attached to private subnets in a VPC, allowing them to access resources like RDS, EC2, or internal services within that VPC.

Security Groups: A security group acts as a virtual firewall for the Lambda function, ensuring that it can access only the necessary resources and ports in the VPC.

Alternatives:

Option B involves routing traffic through a VPN, which adds unnecessary complexity and operational overhead compared to simply attaching the Lambda to the VPC.

Option C requires configuring a VPC endpoint and a NAT gateway, which can be complex and costly.

Option D refers to AWS PrivateLink, which is used to access services over private connections, but it's unnecessary in this scenario unless you need a cross-VPC connection.

Lambda functions in a VPC

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AAttach 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.

CConfigure a VPC endpoint connection for the Lambda function. Set up the VPC endpoint to route traffic through a NAT gateway.

DConfigure an AWS PrivateLink endpoint for the private resources. Configure the Lambda function to reference the PrivateLink endpoint.

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Total 292 questions

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