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The DVA-C02 exam covers a wide range of topics related to AWS development, including AWS core services such as EC2, S3, and RDS, as well as AWS developer tools like AWS CodeDeploy, AWS CodePipeline, and AWS CloudFormation. Additionally, the exam tests candidates on their knowledge of programming languages commonly used in AWS development, such as Python, Java, and Node.js.

Amazon DVA-C02 (AWS Certified Developer - Associate) Certification Exam is a sought-after certification for professionals who want to specialize in developing and deploying applications on AWS. DVA-C02 Exam is designed for individuals with at least one year of experience in developing and maintaining applications on the AWS platform. AWS Certified Developer - Associate certification validates the skills and knowledge required to build and deploy secure, scalable, and fault-tolerant applications on AWS.

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Amazon AWS Certified Developer - Associate Sample Questions (Q539-Q544):

NEW QUESTION # 539
A company is building a micro services app1 cation that consists of many AWS Lambda functions. The development team wants to use AWS Serverless Application Model (AWS SAM) templates to automatically test the Lambda functions. The development team plans to test a small percentage of traffic that is directed to new updates before the team commits to a full deployment of the application.
Which combination of steps will meet these requirements in the MOST operationally efficient way? (Select TWO.)

A. Set the deployment preference type to Linear10PefcentEvery10Minutes Use hooks to test the deployment.
B. Enable gradual deployments through AWS SAM templates.
C. Use AWS SAM CLI commands in AWS CodeDeploy lo invoke the Lambda functions to lest the deployment
D. Declare the EventlnvokeConfig on the Lambda functions in the AWS SAM templates with OnSuccess and OnFailure configurations.
E. Set the deployment preference type to Canary10Percen130Minutes Use hooks to test the deployment.

Answer: B,E

Explanation:
This solution will meet the requirements by using AWS Serverless Application Model (AWS SAM) templates and gradual deployments to automatically test the Lambda functions. AWS SAM templates are configuration files that define serverless applications and resources such as Lambda functions. Gradual deployments are a feature of AWS SAM that enable deploying new versions of Lambda functions incrementally, shifting traffic gradually, and performing validation tests during deployment. The developer can enable gradual deployments through AWS SAM templates by adding a DeploymentPreference property to each Lambda function resource in the template. The developer can set the deployment preference type to Canary10Percent30Minutes, which means that 10 percent of traffic will be shifted to the new version of the Lambda function for 30 minutes before shifting 100 percent of traffic. The developer can also use hooks to test the deployment, which are custom Lambda functions that run before or after traffic shifting and perform validation tests or rollback actions.

NEW QUESTION # 540
A developer is creating a service that uses an Amazon S3 bucket for image uploads. The service will use an AWS Lambda function to create a thumbnail of each image Each time an image is uploaded the service needs to send an email notification and create the thumbnail The developer needs to configure the image processing and email notifications setup.
Which solution will meet these requirements?

A. Create an Amazon Simple Queue Service (Amazon SQS) queue. Send S3 event notifications to Amazon EventBridge. Create an EventBndge rule that runs the Lambda function when images are uploaded to the S3 bucket Create an EventBridge rule that sends notifications to the SQS queue Create an email notification subscription to the SQS queue
B. Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure S3 event notifications with a destination of the SNS topic. Subscribe the Lambda function to the SNS topic. Create an Amazon Simple Queue Service (Amazon SQS) queue Subscribe the SQS queue to the SNS topic Create an email notification subscription to the SQS queue.
C. Create an Amazon Simple Queue Service (Amazon SQS) queue Configure S3 event notifications with a destination of the SQS queue Subscribe the Lambda function to the SQS queue Create an email notification subscription to the SQS queue.
D. Create an Amazon Simple Notification Service (Amazon SNS) topic Configure S3 event notifications with a destination of the SNS topic Subscribe the Lambda function to the SNS topic Create an email notification subscription to the SNS topic

Answer: D

Explanation:
SNS as a Fan-out Mechanism: SNS is perfect for triggering multiple actions from a single event (here, the image upload).
Workflow:
SNS Topic: Create an SNS topic that will be the central notification point.
S3 Event Notification: Configure the S3 bucket to send 'Object Created' event notifications to the SNS topic.
Lambda Subscription: Subscribe your thumbnail-creating Lambda function to the SNS topic.
Email Subscription: Subscribe an email address to the SNS topic to trigger notifications.
Reference:
S3 Event Notifications: https://docs.aws.amazon.com/AmazonS3/latest/userguide/EventNotifications.html SNS Subscriptions: https://docs.aws.amazon.com/sns/latest/dg/SNSMobilePush.html

NEW QUESTION # 541
A developer has a continuous integration and continuous delivery (CI/CD) pipeline that uses AWS CodeArtifact and AWS CodeBuild. The build artifacts are between 0.5 GB and 1.5 GB in size.
The builds happen frequently and retrieve many dependencies from CodeArtifact each time.
The builds have been slow because of the time it takes to transfer dependencies. The developer needs to improve build performance by reducing the number of dependencies that are retrieved for each build.
Which solution will meet this requirement?

A. Specify an Amazon S3 cache in CodeBuild. Add the S3 cache folder path to the buildspec.yaml file for the build project.
B. Specify a local cache in CodeBuild. Add the cache folder path to the buildspec.yaml file for the build project.
C. Retrieve the buildspec.yaml file directly from CodeArtifact. Add the CodeArtifact repository name to the buildspec.yaml file for the build project.
D. Specify a local cache in CodeBuild. Add the CodeArtifact repository name to the buildspec.yaml file for the build project.

Answer: B

Explanation:
Using a local cache in CodeBuild allows you to cache dependencies locally on the build host, which can significantly reduce the time it takes to retrieve dependencies during subsequent builds.

NEW QUESTION # 542
An application that is hosted on an Amazon EC2 instance needs access to files that are stored in an Amazon S3 bucket. The application lists the objects that are stored in the S3 bucket and displays a table to the user.
During testing, a developer discovers that the application does not show any objects in the list.
What is the MOST secure way to resolve this issue?

A. Update the S3 bucket policy by including the S3:ListBucket permission and by setting the Principal element to specify the account number of the EC2 instance.
B. Update the developer's user permissions to include the S3:ListBucket permission for the S3 bucket.
C. Update the IAM instance profile that is attached to the EC2 instance to include the S3:* permission for the S3 bucket.
D. Update the IAM instance profile that is attached to the EC2 instance to include the S3:ListBucket permission for the S3 bucket.

Answer: D

Explanation:
IAM instance profiles are containers for IAM roles that can be associated with EC2 instances. An IAM role is a set of permissions that grant access to AWS resources. An IAM role can be used to allow an EC2 instance to access an S3 bucket by including the appropriate permissions in the role's policy. The S3:ListBucket permission allows listing the objects in an S3 bucket. By updating the IAM instance profile with this permission, the application on the EC2 instance can retrieve the objects from the S3 bucket and display them to the user. Reference: Using an IAM role to grant permissions to applications running on Amazon EC2 instances

NEW QUESTION # 543
A company is offering APIs as a service over the internet to provide unauthenticated read access to statistical information that is updated daily. The company uses Amazon API Gateway and AWS Lambda to develop the APIs. The service has become popular, and the company wants to enhance the responsiveness of the APIs.
Which action can help the company achieve this goal?

A. Configure usage plans and API keys in API Gateway.
B. Configure API Gateway to use an interface VPC endpoint.
C. Enable API caching in API Gateway.
D. Enable cross-origin resource sharing (CORS) for the APIs.

Answer: C

Explanation:
https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-caching.html

NEW QUESTION # 544
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Amazon AWS Certified Developer - Associate Sample Questions (Q539-Q544):

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