FREE PDF HIGH HIT-RATE AMAZON - DVA-C02 - RELIABLE TEST AWS CERTIFIED DEVELOPER - ASSOCIATE TEST

Free PDF High Hit-Rate Amazon - DVA-C02 - Reliable Test AWS Certified Developer - Associate Test

Free PDF High Hit-Rate Amazon - DVA-C02 - Reliable Test AWS Certified Developer - Associate Test

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The DVA-C02 exam is designed to assess the developer's ability to develop, deploy, and maintain AWS-based applications using AWS SDKs, APIs, and AWS CLI. DVA-C02 exam is also designed to test the developer's understanding of AWS services such as AWS Lambda, Amazon Elastic Beanstalk, Amazon EC2, and Amazon RDS. DVA-C02 exam requires the candidate to have a deep understanding of AWS services and how they can be used to create robust and scalable applications.

Amazon DVA-C02 (AWS Certified Developer - Associate) exam is a certification offered by Amazon Web Services (AWS) for developers who want to demonstrate their expertise in designing, developing, and deploying cloud-based solutions using AWS technologies. DVA-C02 Exam validates a candidate's ability to write code using AWS APIs, create and maintain applications using AWS services, and deploy applications on AWS infrastructure. AWS Certified Developer - Associate certification is recommended for developers with one or more years of experience with AWS.

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The DVA-C02 Exam is an associate-level certification, which means that candidates should have a good understanding of AWS services and be able to demonstrate their knowledge of AWS best practices. DVA-C02 exam covers a wide range of topics, including AWS core services, security, and deployment. It also covers topics such as how to design and develop scalable AWS applications, how to troubleshoot issues, and how to optimize application performance.

Amazon AWS Certified Developer - Associate Sample Questions (Q272-Q277):

NEW QUESTION # 272
A developer is building a microservices-based application by using Python on AWS and several AWS services The developer must use AWS X-Ray The developer views the service map by using the console to view the service dependencies. During testing, the developer notices that some services are missing from the service map What can the developer do to ensure that all services appear in the X-Ray service map?

  • A. Instrument the application by using the X-Ray SDK for Python. Install the X-Ray SDK for all the services that the application uses
  • B. Modify the X-Ray Python agent configuration in each service to increase the sampling rate
  • C. Enable X-Ray data aggregation in Amazon CloudWatch Logs for all the services that the application uses
  • D. Increase the X-Ray service map timeout value in the X-Ray console

Answer: A

Explanation:
AWS X-Ray SDK: The primary way to enable X-Ray tracing within applications. The SDK sends data about requests and subsegments to the X-Ray daemon for service map generation.
Instrumenting All Services: To visualize a complete microservice architecture on the service map, each relevant service must include the X-Ray SDK.
Reference:
AWS X-Ray Documentation: https://docs.aws.amazon.com/xray/
X-Ray SDK for Python: https://docs.aws.amazon.com/xray/latest/devguide/xray-sdk-python.html


NEW QUESTION # 273
A company has an application that uses an AWS Lambda function to process customer orders. The company notices that the application processes some orders more than once.
A developer needs to update the application to prevent duplicate processing.
Which solution will meet this requirement with the LEAST implementation effort?

  • A. Configure the Lambda function to retry failed invocations. Implement a retry mechanism that has a fixed delay between attempts to handle duplicate events.
  • B. Implement a de-duplication mechanism that uses Amazon DynamoDB as the control database.
    Configure the Lambda function to check for the existence of a unique identifier before processing each event.
  • C. Create a custom Amazon ECS task to perform idempotency checks. Use AWS Step Functions to integrate the ECS task with the Lambda function.
  • D. Use Amazon Athena to query processed events to identify duplicate records. Add processing logic to the Lambda function to handle the duplication scenarios that the query identifies.

Answer: B

Explanation:
Requirement Summary:
* Orders are being processedmore than once
* Need to preventduplicate processing
* Looking forleast implementation effort
Key Concept:
* Lambda + Event-driven patternscan occasionally result induplicate invocations(at-least-once delivery model)
* You needidempotency(i.e., prevent repeated processing of same event)
Evaluate Options:
#A. Use DynamoDB for de-duplication
* #Simple and widely used approach
* Store a unique orderId as the primary key
* Before processing,check if order exists
* If yes # skip
* If no # process and store the ID
* #Minimal code changes required
B: ECS + Step Functions
* #Overkill for basic de-duplication
* Adds significant complexity
C: Retry logic with fixed delay
* #Doesn't prevent duplication -makes it worse
* Retrying might trigger thesame message again
D: Athena to identify duplicates
* #Reactive solution, not preventative
* Not suitable for real-time event de-duplication
* Lambda idempotency:https://docs.aws.amazon.com/lambda/latest/dg/invocation-retries.html
* Using DynamoDB for idempotent design: https://aws.amazon.com/blogs/compute/how-to-design- idempotent-APIs-on-aws/


NEW QUESTION # 274
A developer uses AWS CloudFormation to deploy an Amazon API Gateway API and an AWS Step Functions state machine. The state machine must reference the API Gateway API after the CloudFormation template is deployed. The developer needs a solution that uses the state machine to reference the API Gateway endpoint.
Which solution will meet these requirements MOST cost-effectively?

  • A. Configure the CloudFormation template to store the API endpoint in a standard AWS::AppConfig::ConfigurationProfile resource. Configure the state machine to reference the resource.
  • B. Configure the CloudFormation template to reference the API endpoint in the DefinitionSubstitutions property for the AWS::StepFunctions::StateMachine resource.
  • C. Configure the CloudFormation template to store the API endpoint in an environment variable for the AWS::StepFunctions::StateMachine resource. Configure the state machine to reference the environment variable.
  • D. Configure the CloudFormation template to store the API endpoint in a standard AWS::SecretsManager::Secret resource. Configure the state machine to reference the resource.

Answer: B


NEW QUESTION # 275
A company runs an application on AWS. The application consists of a static website that is hosted on Amazon S3. The application includes Amazon API Gateway APIs that invoke AWS Lambda functions. During a period of high traffic on the application, application users reported that the application was slow at irregular intervals. There were no failed requests.
A developer needs to find the slow executions across all the Lambda functions.
Which solution will meet these requirements?

  • A. Perform a query across all the Lambda function log groups by using Amazon CloudWatch Logs Insights. Filter on type of report and sort descending by Lambda function execution duration.
  • B. Set up AWS Glue to crawl through the logs in Amazon CloudWatch Logs for the Lambda functions. Configure an AWS Glue job to transform the logs into a structured format and to output the logs into Amazon S3. Use the Amazon CloudWatch dashboard to visualize the slowest functions based on the duration.
  • C. Enable AWS CloudTrail Insights on the account where the Lambda functions are running. After CloudTrail Insights has finished processing, review CloudTrail Insights to find the anomalous functions.
  • D. Enable AWS X-Ray for all the Lambda functions. Configure an X-Ray insight on a new group that includes all the Lambda functions. After the X-Ray insight has finished processing, review the X- Ray logs.

Answer: C


NEW QUESTION # 276
A developer is troubleshooting an Amazon API Gateway API. Clients are receiving HTTP 400 response errors when the clients try to access an endpoint of the API.
How can the developer determine the cause of these errors?

  • A. Turn on AWS X-Ray for the API stage. Create an Amazon CloudWatch Logs log group. Specify the Amazon Resource Name (ARN) of the log group for the API stage.
  • B. Turn on AWS CloudTrail Insights and create a trail. Specify the Amazon Resource Name (ARN) of the trail for the stage of the API.
  • C. Turn on execution logging and access logging in Amazon CloudWatch Logs for the API stage.Create a CloudWatch Logs log group. Specify the Amazon Resource Name (ARN) of the log group for the API stage.
  • D. Create an Amazon Kinesis Data Firehose delivery stream to receive API call logs from API Gateway. Configure Amazon CloudWatch Logs as the delivery stream's destination.

Answer: C

Explanation:
Error code 400 means bad request.
https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-logging.html The logged data includes errors or execution traces (such as request or response parameter values or payloads).


NEW QUESTION # 277
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