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Amazon DVA-C02 (AWS Certified Developer - Associate) Exam is a certification exam designed for individuals who want to validate their skills and knowledge in developing and deploying applications on the Amazon Web Services (AWS) platform. AWS is a cloud-based platform that offers a wide range of services such as computing power, storage, and databases, among others. The Amazon DVA-C02 Exam Tests an individual's ability to design, develop, and deploy cloud-based applications using AWS services.

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The AWS Certified Developer - Associate exam is an essential certification for developers who want to demonstrate their expertise in developing and deploying applications on the AWS platform. AWS Certified Developer - Associate certification can help candidates advance their careers and open up new opportunities in the field of cloud computing.

Amazon AWS Certified Developer - Associate Sample Questions (Q419-Q424):

NEW QUESTION # 419
A developer is using AWS CodeDeploy to automate a company's application deployments to Amazon EC2.
Which application specification file properties are required to ensure the software deployments do not fail?
(Select TWO.)

A. The file must be a YAML-formatted file named appspec.yml.
B. The file must be placed in the root of the directory structure of the application's source code.
C. The file must be stored in Amazon S3 and referenced from the application's source code.
D. The file must be a JSON-formatted file named appspec.json.
E. The file must be stored in AWS CodeBuild and referenced from the application's source code.

Answer: A,B

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
To ensure successful software deployments using AWS CodeDeploy, the application specification file (appspec.yml or appspec.json) must adhere to specific requirements:
* File Format Requirement (Option B):
* The appspec.yml file is a YAML-formatted file required for defining deployment actions and file locations. This is the modern and recommended format for application specification files.
* It can also be a JSON-formatted file named appspec.json, but YAML is most commonly used and accepted.
* File Placement Requirement (Option D):
* The application specification file must reside in the root directory of the application's source code. This is necessary so that AWS CodeDeploy can detect and use the file during deployment.
* Incorrect Options:
* Option A: While a JSON-formatted file (appspec.json) is valid, this is not a mandatory requirement. YAML is also acceptable, and this option does not account for it.
* Option C: The application specification file is not required to be stored in AWS CodeBuild; it must be included in the source code's directory structure.
* Option E: The application specification file does not need to be stored in Amazon S3. S3 is commonly used for application artifacts, but the appspec.yml or appspec.json file must exist within the deployment package or source code root.
References:
AWS CodeDeploy User Guide: Application Specification File

NEW QUESTION # 420
A company runs a batch processing application by using AWS Lambda functions and Amazon API Gateway APIs with deployment stages for development, user acceptance testing and production A development team needs to configure the APIs in the deployment stages to connect to third-party service endpoints.
Which solution will meet this requirement?

A. Store the third-party service endpoints in Lambda layers that correspond to the stage
B. Encode the third-party service endpoints as query parameters in the API Gateway request URL.
C. Store the third-party service endpoint for each environment in AWS AppConfig
D. Store the third-party service endpoints in API Gateway stage variables that correspond to the stage

Answer: D

Explanation:
* API Gateway Stage Variables:These are designed for configuring dynamic values for your APIs in different deployment stages (dev, test, prod). Here's how to use them for third-party endpoints:
* In the API Gateway console, access the "Stages" section of your API.
* For each stage, create a stage variable named something like thirdPartyEndpoint.
* Set the value of this variable to the actual endpoint URL for that specific environment.
* When configuring API requests within your API Gateway method, reference this endpoint using ${stageVariables.thirdPartyEndpoint}.
* Why Stage Variables Excel Here:
* Environment Isolation: This approach keeps the endpoint configuration specific to each deployment stage, ensuring the right endpoints are used during development, testing, and production cycles.
* Ease of Management: You manage the endpoints directly through the API Gateway console without additional infrastructure.

NEW QUESTION # 421
A developer is creating an application. New users of the application must be able to create an account and register by using their own social media accounts.
Which AWS service or resource should the developer use to meet these requirements?

A. Amazon Cognito identity pools
B. Amazon Cognito user pools
C. AWS Directory Service
D. IAM role

Answer: B

Explanation:
You can't register using Identity Pool. It lets you authenticate with provided identification pools.

NEW QUESTION # 422
A developer is creating an AWS Step Functions state machine to handle an order processing workflow. When the state machine receives an order, the state machine pauses until the order has been confirmed. A record that is added to an Amazon DynamoDB table by another service confirms each order.
The developer must complete the order processing workflow.
Which solution will meet this requirement?

A. Update the state machine to query the DynamoDB table by using the DynamoDB GetItem state to determine whether a record exists. If the record does exist, continue to the next state. If the record does not exist, wait 5 minutes and check again.
B. Subscribe an AWS Lambda function to a DynamoDB table stream. Configure the Lambda function to run when a new record is added to the table.
When the Lambda function receives the appropriate record, run the redrive execution command on the running state machine.
C. Subscribe an AWS Lambda function to the DynamoDB table stream. Configure the Lambda function to run when a new record is added to the table.
When the Lambda function receives the appropriate record, stop the current state machine invocation and start a new invocation.
D. Invoke an AWS Lambda function from the state machine. Configure the Lambda function to continuously poll the DynamoDB table for the appropriate record and to return when a record exists. Continue the state machine invocation when the Lambda function returns. If the Lambda function times out, then fail the state machine.

Answer: B

NEW QUESTION # 423
A company is running Amazon EC2 instances in multiple AWS accounts. A developer needs to implement an application that collects all the lifecycle events of the EC2 instances. The application needs to store the lifecycle events in a single Amazon Simple Queue Service (Amazon SQS) queue in the company's main AWS account for further processing.
Which solution will meet these requirements?

A. Configure the permissions on the main account event bus to receive events from all accounts. Create an Amazon EventBridge rule in each account to send all the EC2 instance lifecycle events to the main account event bus. Add an EventBridge rule to the main account event bus that matches all EC2 instance lifecycle events. Set the SQS queue as a target for the rule.
B. Write an AWS Lambda function that scans through all EC2 instances in the company accounts to detect EC2 instance lifecycle changes. Configure the Lambda function to write a notification message to the SQS queue in the main account if the function detects an EC2 instance lifecycle change. Add an Amazon EventBridge scheduled rule that invokes the Lambda function every minute.
C. Use the resource policies of the SQS queue in the main account to give each account permissions to write to that SQS queue. Add to the Amazon EventBridge event bus of each account an EventBridge rule that matches all EC2 instance lifecycle events. Add the SQS queue in the main account as a target of the rule.
D. Configure Amazon EC2 to deliver the EC2 instance lifecycle events from all accounts to the Amazon EventBridge event bus of the main account. Add an EventBridge rule to the event bus of the main account that matches all EC2 instance lifecycle events. Add the SQS queue as a target of the rule.

Answer: A

Explanation:
Amazon EC2 instances can send the state-change notification events to Amazon EventBridge. https://docs.
aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-instance-state-changes.html Amazon EventBridge can send and receive events between event buses in AWS accounts. https://docs.aws.amazon.com/eventbridge
/latest/userguide/eb-cross-account.html

NEW QUESTION # 424
......

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