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The DVA-C02 certification is a valuable credential for developers who want to advance their careers in the cloud computing industry. By earning this certification, developers can demonstrate their proficiency in AWS development and enhance their credibility with employers and clients. AWS Certified Developer - Associate certification also provides access to a community of AWS experts and resources, as well as opportunities for career growth and advancement.

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 DVA-C02 is an official certification exam provided by Amazon Web Services (AWS) that validates one's technical knowledge and expertise in developing and deploying applications on the AWS platform. DVA-C02 exam is designed for developers who have at least one year of hands-on experience with AWS services and are familiar with the core AWS services, as well as the best practices for developing, deploying, and debugging applications on AWS.

Amazon AWS Certified Developer - Associate Sample Questions (Q322-Q327):

NEW QUESTION # 322
A developer is designing a full-stack serverless application. Files for the website are stored in an Amazon S3 bucket. AWS Lambda functions that use Amazon API Gateway endpoints return results from an Amazon DynamoDB table.
The developer must create a solution that securely provides registration and authentication for the application while minimizing the amount of configuration.
Which solution meets these requirements?

A. Configure and launch an Amazon EC2 instance to set up an identity provider with an Amazon Cognito user pool. Configure the user pool to provide the hosted web UI for sign-up and sign-in.
B. Create an Amazon Cognito user pool and an app client. Configure the app client to use the user pool and provide the hosted web UI provided for sign-up and sign-in.
C. Create an IAM policy that allows access to the website that is stored in the S3 bucket. Attach the policy to an IAM group. Add IAM users to the group.
D. Configure an Amazon Cognito identity pool. Map the users with IAM roles that are configured to access the S3 bucket that stores the website.

Answer: B

Explanation:
An Amazon Cognito user pool provides a fully managed user directory with built-in registration and authentication. Creating a user pool with an app client and using the hosted UI offers the quickest, lowest-configuration way to add secure sign-up and sign-in to a serverless web application without building or operating custom identity infrastructure.

NEW QUESTION # 323
A developer works on a public website. The developer wants to add monitoring to the website by using Amazon CloudWatch RUM. The developer needs to configure authentication that allows public access to send events to CloudWatch RUM. Which solutions will meet these requirements? (Choose two.)

A. Create a resource control policy (RCP) that allows unauthenticated access to send events to CloudWatch RUM.
B. Create an AWS IAM role that has permissions to send events to CloudWatch RUM. Create an Amazon Cognito identity pool that uses the IAM role for unauthenticated access. Configure CloudWatch RUM to use the identity pool.
C. Create an identity-based policy that has permissions to send events to CloudWatch RUM. Attach the policy to the CloudWatch RUM app monitor.
D. Create a resource-based policy for the CloudWatch RUM app monitor that allows unauthenticated access to send events to CloudWatch RUM.
E. Create an AWS IAM role that has permissions to send events to CloudWatch RUM. Configure the website to assume the IAM role before sending events.

Answer: B,D

Explanation:
CloudWatch RUM supports public event ingestion in two built-in ways. You can attach a resource-based policy to the app monitor to allow unauthenticated clients to send events, or you can configure an Amazon Cognito identity pool that provides an unauthenticated IAM role for the website to use when sending data to RUM. AWS documentation for creating app monitors explicitly states that if you attach a resource-based policy, you do not need to sign requests with AWS credentials, and otherwise you can use a Cognito identity pool with an unauthenticated identity.

NEW QUESTION # 324
A developer is working on a web application that uses Amazon DynamoDB as its data store. The application has two DynamoDB tables: one table that is named artists and one table that is named songs. The artists table has artistName as the partition key. The songs table has songName as the partition key and artistName as the sort key.
The table usage patterns include the retrieval of multiple songs and artists in a single database operation from the webpage. The developer needs a way to retrieve this information with minimal network traffic and optimal application performance.
Which solution will meet these requirements?

A. Create a local secondary index (LSI) on the songs table that uses artistName as the partition key.
Perform a query operation for each artistName on the songs table that filters by the list of songName. Perform a query operation for each artistName on the artists table.
B. Perform a BatchGetltem operation that returns items from the two tables. Use the list of songName/artistName keys for the songs table and the list of artistName key for the artists table.
C. Perform a Scan operation on each table that filters by the list of songName/artistName for the songs table and the list of artistName in the artists table.
D. Perform a BatchGetitem operation on the songs table that uses the songName/artistName keys.
Perform a BatchGetltem operation on the artists table that uses artistName as the key.

Answer: B

Explanation:
BatchGetItem can return one or multiple items from one or more tables.
https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_BatchGetItem.html

NEW QUESTION # 325
A developer is modifying an existing AWS Lambda function. While checking the code, the developer notices hardcoded parameter values for an Amazon RDS for SQL Server username, password, database, host, and port. There also are hardcoded parameter values for an Amazon DynamoDB table, an Amazon S3 bucket, and an Amazon SNS topic.
The developer wants to securely store the parameter values outside the code in an encrypted format and wants to turn on rotation for the credentials. The developer also wants to be able to reuse the parameter values from other applications and to update the parameter values without modifying code.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create RDS database parameters in AWS Systems Manager Parameter Store for the username, password, database, host, and port. Create encrypted Lambda environment variables for the DynamoDB table, S3 bucket, and SNS topic. Create a Lambda function and set the logic for the credentials rotation task. Schedule the credentials rotation task in Amazon EventBridge.
B. Create RDS database parameters in AWS Systems Manager Parameter Store for the username, password, database, host, and port. Store the DynamoDB table, S3 bucket, and SNS topic in Amazon S3. Create a Lambda function and set the logic for the credentials rotation. Invoke the Lambda function on a schedule.
C. Create an RDS database secret in AWS Secrets Manager. Set the username, password, database, host, and port. Turn on secret rotation. Create encrypted Lambda environment variables for the DynamoDB table, S3 bucket, and SNS topic.
D. Create an RDS database secret in AWS Secrets Manager. Set the username, password, database, host, and port. Turn on secret rotation. Create SecureString parameters in AWS Systems Manager Parameter Store for the DynamoDB table. S3 bucket, and SNS topic.

Answer: D

Explanation:
AWS Secrets Manager is the best fit for storing and rotating the RDS credentials because it provides encrypted secret storage and managed rotation support. AWS Systems Manager Parameter Store SecureString parameters securely store reusable encrypted configuration values such as the DynamoDB table, S3 bucket, and SNS topic, allowing other applications to retrieve updated values without code changes.

NEW QUESTION # 326
A company is building a new application that runs on AWS and uses Amazon API Gateway to expose APIs Teams of developers are working on separate components of the application in parallel The company wants to publish an API without an integrated backend so that teams that depend on the application backend can continue the development work before the API backend development is complete.
Which solution will meet these requirements?

A. Create an EC2 application that returns mocked HTTP responses Create API Gateway resources and set the integration type value to AWS Create an API Gateway stage and deploy the API.
B. Create API Gateway resources and set the integration type value set to HTTP_PROXY. Add mapping templates and deploy the API. Create an AWS Lambda layer that returns various HTTP status codes Associate the Lambda layer with the API deployment
C. Create API Gateway resources and set the integration type value to MOCK Configure the method integration request and integration response to associate a response with an HTTP status code Create an API Gateway stage and deploy the API.
D. Create an AWS Lambda function that returns mocked responses and various HTTP status codes. Create API Gateway resources and set the integration type value to AWS_PROXY Deploy the API.

Answer: C

Explanation:
* API Gateway Mocking: This feature is built for decoupling development dependencies. Here's the process:
* Create resources and methods in your API Gateway.
* Set the integration type to 'MOCK'.
* Define Integration Responses, mapping HTTP status codes to desired mocked responses (JSON, etc.).
* Deployment and Use:
* Create a deployment stage for the API.
* Frontend teams can call this API and get the mocked responses without a real backend.

NEW QUESTION # 327
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