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First-hand Amazon DVA-C02 PDF Question: AWS Certified Developer - Associate

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Amazon DVA-C02 Certification Exam is designed for software developers who want to showcase their skills and knowledge of AWS services and technologies. DVA-C02 exam is a great way for developers to validate their expertise in building and deploying scalable, fault-tolerant, and secure applications on AWS. The DVA-C02 exam is an updated version of the previous DVA-C01 exam, and it includes new topics and services that are essential for developers who want to stay up-to-date with the latest AWS technologies.

Amazon DVA-C02 certification exam is an essential credential for developers who want to advance their careers in the cloud computing industry. AWS Certified Developer - Associate certification is highly valued by employers, as it demonstrates a candidate's proficiency in AWS development skills. AWS is one of the leading cloud computing platforms, and the demand for AWS certified professionals is continually increasing. Therefore, obtaining the AWS Certified Developer - Associate certification is an excellent investment in your career.

The AWS Certified Developer - Associate exam covers a range of topics, including AWS core services, security, identity and access management, databases, and storage. Candidates are required to demonstrate proficiency in developing, deploying, and debugging cloud-based applications using AWS services like AWS Lambda, Amazon S3, Amazon DynamoDB, and Amazon EC2.

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Amazon AWS Certified Developer - Associate Sample Questions (Q123-Q128):

NEW QUESTION # 123
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. 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.
B. 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.
C. 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.
D. 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.

Answer: C

NEW QUESTION # 124
A developer is creating an application that will give users the ability to store photos from their cellphones in the cloud. The application needs to support tens of thousands of users. The application uses an Amazon API Gateway REST API that is integrated with AWS Lambda functions to process the photos. The application stores details about the photos in Amazon DynamoDB.
Users need to create an account to access the application. In the application, users must be able to upload photos and retrieve previously uploaded photos. The photos will range in size from 300 KB to 5 MB.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create an IAM user for each user of the application during the sign-up process. Use IAM authentication to access the API Gateway API. Use the Lambda function to store the photos in Amazon S3. Store the object's S3 key as part of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
B. Use Amazon Cognito user pools to manage user accounts. Create an Amazon Cognito user pool authorizer in API Gateway to control access to the API. Use the Lambda function to store the photos and details in the DynamoDB table. Retrieve previously uploaded photos directly from the DynamoDB table.
C. Create a users table in DynamoDB. Use the table to manage user accounts. Create a Lambda authorizer that validates user credentials against the users table. Integrate the Lambda authorizer with API Gateway to control access to the API. Use the Lambda function to store the photos in Amazon S3. Store the object's S3 key as par of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
D. Use Amazon Cognito user pools to manage user accounts. Create an Amazon Cognito user pool authorizer in API Gateway to control access to the API. Use the Lambda function to store the photos in Amazon S3. Store the object's S3 key as part of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.

Answer: D

NEW QUESTION # 125
A company has an AWS Lambda function that processes incoming requests from an Amazon API Gateway API. The API calls the Lambda function by using a Lambda alias. A developer updated the Lambda function code to handle more details related to the incoming requests. The developer wants to deploy the new Lambda function for more testing by other developers with no impact to customers that use the API.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create a new version of the Lambda function. Create a new API Gateway API for testing purposes. Update the integration of the new API with the new Lambda version. Use the new API for testing.
B. Update the existing Lambda alias used by API Gateway to a weighted alias. Add the new Lambda version as an additional Lambda function with a weight of 10%. Use the existing API Gateway stage for testing.
C. Create a new version of the Lambda function. Create and deploy a second Lambda function to filter incoming requests from API Gateway. If the filtering Lambda function detects a test request, the filtering Lambda function will invoke the new Lambda version of the code. For other requests, the filtering Lambda function will invoke the old Lambda version. Update the API Gateway API to use the filtering Lambda function.
D. Create a new version of the Lambda function. Create a new stage on API Gateway with integration to the new Lambda version. Use the new API Gateway stage to test the Lambda function.

Answer: D

NEW QUESTION # 126
A developer needs to export the contents of several Amazon DynamoDB tables into Amazon S3 buckets to comply with company data regulations. The developer uses the AWS CLI to run commands to export from each table to the proper S3 bucket. The developer sets up AWS credentials correctly and grants resources appropriate permissions. However, the exports of some tables fail.
What should the developer do to resolve this issue?

A. Ensure that the target S3 bucket is in the same AWS Region as the DynamoDB table.
B. Ensure that point-in-time recovery is enabled on the DynamoDB tables.
C. Ensure that DynamoDB streaming is enabled for the tables.
D. Ensure that DynamoDB Accelerator (DAX) is enabled.

Answer: A

Explanation:
Comprehensive Detailed and Lengthy Step-by-Step Explanation with All AWS Developer References:
1. Understanding the Use Case:
The developer needs to export DynamoDB table data into Amazon S3 buckets using the AWS CLI, and some exports are failing. Proper credentials and permissions have already been configured.
2. Key Conditions to Check:
* Region Consistency:DynamoDB exports require that the target S3 bucket and the DynamoDB table reside in the same AWS Region. If they are not in the same Region, the export process will fail.
* Point-in-Time Recovery (PITR):PITR is not required for exporting data from DynamoDB to S3.
Enabling PITR allows recovery of table states at specific points in time but does not directly influence export functionality.
* DynamoDB Streams:Streams allow real-time capture of data modifications but are unrelated to the bulk export feature.
* DAX (DynamoDB Accelerator):DAX is a caching service that speeds up read operations for DynamoDB but does not affect the export functionality.
3. Explanation of the Options:
* Option A:"Ensure that point-in-time recovery is enabled on the DynamoDB tables."While PITR is useful for disaster recovery and restoring table states, it is not required for exporting data to S3. This option does not address the export failure.
* Option B:"Ensure that the target S3 bucket is in the same AWS Region as the DynamoDB table."This is the correct answer. DynamoDB export functionality requires the target S3 bucket to reside in the same AWS Region as the DynamoDB table. If the S3 bucket is in a different Region, the export will fail.
* Option C:"Ensure that DynamoDB streaming is enabled for the tables."Streams are useful for capturing real-time changes in DynamoDB tables but are unrelated to the export functionality. This option does not resolve the issue.
* Option D:"Ensure that DynamoDB Accelerator (DAX) is enabled."DAX accelerates read operations but does not influence the export functionality. This option is irrelevant to the issue.
4. Resolution Steps:
To ensure successful exports:
* Verify theRegion of the DynamoDB tables:
* Check the Region where each table is located.
* Verify theRegion of the target S3 buckets:
* Confirm that the target S3 bucket for each export is in the same Region as the corresponding DynamoDB table.
* If necessary, create new S3 buckets in the appropriate Regions.
* Run the export command again with the correct setup:
aws dynamodb export-table-to-point-in-time
--table-name <TableName>
--s3-bucket <BucketName>
--s3-prefix <Prefix>
--export-time <ExportTime>
--region <Region>

NEW QUESTION # 127
A company has an application that runs across multiple AWS Regions. The application is experiencing performance issues at irregular intervals. A developer must use AWS X-Ray to implement distributed tracing for the application to troubleshoot the root cause of the performance issues.
What should the developer do to meet this requirement?

A. Use the X-Ray console to add annotations for AWS services and user-defined services
B. Use Region annotation that X-Ray adds automatically for user-defined services Configure X-Ray to add Region annotation for AWS services
C. Use Region annotation that X-Ray adds automatically for AWS services Add Region annotation for user-defined services
D. Use the X-Ray daemon to add annotations for AWS services and user-defined services

Answer: C

Explanation:
Explanation
AWS X-Ray automatically adds Region annotation for AWS services that are integrated with X-Ray. This annotation indicates the AWS Region where the service is running. The developer can use this annotation to filter and group traces by Region and identify any performance issues related to cross-Region calls. The developer can also add Region annotation for user-defined services by using the X-Ray SDK. This option enables the developer to implement distributed tracing for the application that runs across multiple AWS Regions. References
* AWS X-Ray Annotations
* AWS X-Ray Concepts

NEW QUESTION # 128
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