Exam Topics DVA-C02 Pdf - DVA-C02 Exam Materials

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Amazon DVA-C02 Certification Exam is ideal for developers who are already familiar with AWS services and want to enhance their skills in designing and developing AWS applications. AWS Certified Developer - Associate certification validates the knowledge and skills required to build and deploy cloud-based applications using AWS services such as AWS Lambda, Amazon DynamoDB, Amazon S3, and more.

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The DVA-C02 Certification Exam consists of 65 multiple-choice and multiple-response questions that are to be completed in 130 minutes. DVA-C02 exam covers a range of topics, including AWS core services, database technologies, security and compliance, and deployment and monitoring. Candidates who pass the DVA-C02 exam demonstrate their ability to develop, deploy, and maintain applications using AWS services in a cost-effective, scalable, and reliable manner. AWS Certified Developer - Associate certification is suitable for developers, DevOps engineers, and solutions architects who want to advance their careers in cloud computing and demonstrate their expertise in AWS.

Amazon AWS Certified Developer - Associate Sample Questions (Q865-Q870):

NEW QUESTION # 865
A company is using an Amazon API Gateway REST API endpoint as a webhook to publish events from an on-premises source control management (SCM) system to Amazon EventBridge.
The company has configured an EventBridge rule to listen for the events and to control application deployment in a central AWS account. The company needs to receive the same events across multiple receiver AWS accounts.
How can a developer meet these requirements without changing the configuration of the SCM system?

A. Deploy the API Gateway REST API to all the receiver AWS accounts. Create as many SCM webhooks as the number of AWS accounts.
B. Convert the API Gateway type from REST API to HTTP API.
C. Deploy the API Gateway REST API to all the required AWS accounts. Use the same custom domain name for all the gateway endpoints so that a single SCM webhook can be used for all events from all accounts.
D. Grant permission to the central AWS account for EventBridge to access the receiver AWS accounts. Add an EventBridge event bus on the receiver AWS accounts as the targets to the existing EventBridge rule.

Answer: D

NEW QUESTION # 866
A company has built a serverless application for its ecommerce website. The application includes a REST API in Amazon API Gateway that invokes an AWS Lambda function. The Lambda function processes data and stores the data in Amazon DynamoDB table. The Lambda function calls a third-party stock application API to process the order. After the ordered is processed, the Lambda function returns an HTTP 200 status code with no body to the client.
During peak usage when the API calls exceeds a certain threshold, the third-party stock application sometimes fails to process the data and responds with error messages. The company needs a solution that will not overwhelm the third-party stock application.
Which solution will meet these requirements?

A. Configure the REST API in API Gateway to write the requests directly into Amazon Athena.Configure the transformation of the data by using SQL with multiple query result locations set up to point to the DynamoDB table and the third-party stock fulfilment application API. Delete the Lambda function.
B. Configure the REST API in API Gateway to write the requests directly into DynamoDB. Configure a DynamoDB intrinsic function to perform the transformation. Set up a DynamoDB stream to call the third-party stock application API with each new row. Delete the Lambda function.
C. Configure the REST API in API Gateway to write the requests directly into an Amazon Simple Queue Service (Amazon SQS) queue. Configure the Lambda function with a reserved concurrency equal to the third-party stock application's threshold. Set Lambda function to process the messages from the SQS queue.
D. Configure the REST API in API Gateway to write the requests directly into an Amazon Simple Notification Service (Amazon SNS) topic. Configure the Lambda function with a provisioned concurrency equal to the third-party stock application's threshold. Set the Lambda function to process the messages from the SNS topic.

Answer: D

NEW QUESTION # 867
A developer is troubleshooting an application mat uses Amazon DynamoDB in the uswest-2 Region. The application is deployed to an Amazon EC2 instance. The application requires read-only permissions to a table that is named Cars The EC2 instance has an attached IAM role that contains the following IAM policy.

When the application tries to read from the Cars table, an Access Denied error occurs.
How can the developer resolve this error?

A. Create a trust policy that specifies the EC2 service principal. Associate the role with the policy.
B. Modify the IAM policy to include the dynamodb * action
C. Create a trust relationship between the role and dynamodb Amazonas com.
D. Modify the IAM policy resource to be "arn aws dynamo* us-west-2 account-id table/*"

Answer: A

Explanation:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/access-control-overview.html#access- control-resource-ownership

NEW QUESTION # 868
A company uses AWS CloudFormation to deploy an application that uses an Amazon API Gateway REST API with AWS Lambda function integration. The application uses Amazon DynamoDB for data persistence. The application has three stages: development, testing, and production. Each stage uses its own DynamoDB table.
The company has encountered unexpected issues when promoting changes to the production stage. The changes were successful in the development and testing stages. A developer needs to route 20% of the traffic to the new production stage API with the next production release. The developer needs to route the remaining 80% of the traffic to the existing production stage. The solution must minimize the number of errors that any single customer experiences.
Which approach should the developer take to meet these requirements?

A. Deploy an Application Load Balancer (ALB) in front of the REST API. Change the production API Amazon Route 53 record to point traffic to the ALB. Register the production and testing stages as targets of the ALB with weights of 80% and 20%, respectively.
B. Update 20% of the planned changes to the production stage. Deploy the new production stage.
Monitor the results. Repeat this process five times to test all planned changes.
C. Update the Amazon Route 53 DNS record entry for the production stage API to use a weighted routing policy. Set the weight to a value of 80. Add a second record for the production domain name. Change the second routing policy to a weighted routing policy. Set the weight of the second policy to a value of 20. Change the alias of the second policy to use the testing stage API.
D. Configure canary settings for the production stage API. Change the percentage of traffic directed to canary deployment to 20%. Make the planned updates to the production stage. Deploy the changes

Answer: D

NEW QUESTION # 869
A company operates a web-based loan processing application. The application ' s UI is implemented in JavaScript. The frontend transmits application data securely by using HTTPS to Amazon API Gateway, which invokes an AWS Lambda function in private subnets. The Lambda function interacts with third-party credit check APIs that require persistent API keys. The company enforces strict policies to ensure that personally identifiable information (PII) and sensitive credentials are never exposed in client code, request paths, headers, or logs. The company needs a solution to manage the API keys that the Lambda function must use.
Which solution will meet this requirement in the MOST secure way?

A. Store the API keys as resource metadata tags on the Lambda function. Configure the Lambda function to read its own tags at startup by using the AWS SDK. Use IAM conditions to control access to the keys when the function retrieves the tags.
B. Bundle the API keys inside the minified client-side JavaScript. Configure the web application to call the Lambda function by using an API Gateway HTTP API, cross-origin resource sharing (CORS) restrictions, domain allowlists, and frequent rotation.
C. Pass the API keys to the Lambda function by including the keys as URL query parameters in each HTTPS request. Rely on TLS for encryption of the payload and response. Use API Gateway logging controls to manage what query parameters are logged.
D. Store the API keys as encrypted environment variables by using an AWS KMS key. Configure the execution role of the Lambda function to have permissions to securely decrypt the environment variables at runtime.

Answer: D

Explanation:
The correct answer is A . For a Lambda-based application that must use third-party API keys while ensuring secrets never appear in client code, request URLs, headers, or logs, storing the keys as encrypted Lambda environment variables protected by AWS KMS is the most secure choice among the options given. AWS supports encryption at rest for Lambda environment variables, and the function's execution role can be granted permission to decrypt those values at runtime. This keeps the secrets entirely on the server side and out of the browser and request path.
Option B is insecure because query string parameters are a poor location for secrets. Even when HTTPS is used, query parameters can still be exposed through logs, monitoring systems, browser history, proxies, or debugging tools. Option C is clearly unacceptable because embedding secrets in client-side JavaScript exposes them to users. Obfuscation or minification does not provide security. Option D is also not appropriate because AWS resource tags are not a secrets-management mechanism and are not intended for storing confidential credentials.
From AWS security best practices, secrets should never be embedded in client applications and should be stored in protected server-side configuration with strong access controls. Although AWS Secrets Manager would often be the stronger real-world recommendation for rotating and retrieving secrets, it is not listed here.
Among the available choices, KMS-encrypted Lambda environment variables best satisfy the requirements for confidentiality, controlled access, and avoiding accidental exposure in application logs or HTTP request elements.
Therefore, A is the most secure answer.

NEW QUESTION # 870
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