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As the tech industry continues to evolve and adapt to new technologies, professionals who hold the AWS Certified Developer - Associate (DVA-C02) certification are better equipped to navigate these changes and stay ahead of the curve, increasing their value to employers and clients. In today's fast-paced and ever-changing Amazon sector, having the AWS Certified Developer - Associate (DVA-C02) certification has become a necessary requirement for individuals looking to advance their careers and stay competitive in the job market.

Amazon DVA-C02 Exam Overview:

Certification Vendor:	Amazon Web Services (AWS)
Exam Name:	AWS Certified Developer - Associate
Exam Number:	DVA-C02
Related Certifications:	AWS Certified DevOps Engineer - Professional AWS Certified Cloud Practitioner
Real Exam Qty:	65 (50 scored, 15 unscored)
Passing Score:	720 (scaled score of 100–1,000)
Certificate Validity Period:	3 years
Available Languages:	Simplified Chinese, Korean, Spanish (Latin America), Portuguese (Brazil), English, Japanese
Exam Price:	150 USD
Exam Duration:	130 minutes
Exam Format:	Multiple choice, Multiple response
Sample Questions:	Amazon DVA-C02 Sample Questions
Exam Way:	Pearson VUE testing center or online proctored exam
Pre Condition:	Recommended 1 or more years of hands-on experience in developing and maintaining applications using AWS services. Proficiency in at least one high-level programming language.
Official Syllabus URL:	https://aws.amazon.com/certification/certified-developer-associate/

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Amazon DVA-C02 Certification is a valuable credential for developers who want to demonstrate their expertise in developing and maintaining cloud-based applications on the AWS platform. With its comprehensive coverage of AWS services and best practices, the certification exam provides a way for developers to showcase their skills and knowledge, and to differentiate themselves in a competitive job market.

Amazon DVA-C02 (AWS Certified Developer - Associate) certification exam is designed to validate the skills and knowledge of individuals who develop and maintain applications on the AWS platform. AWS Certified Developer - Associate certification is intended for developers who have experience in designing and developing cloud-based applications, and who want to demonstrate their expertise in using AWS services to build scalable, reliable, and highly available applications.

Amazon AWS Certified Developer - Associate Sample Questions (Q625-Q630):

NEW QUESTION # 625
A developer is designing a new feature for an existing application. The new feature uses an AWS Lambda function. The developer wants to test the Lambda function safely in a development AWS account and a testing AWS account before deploying the function into a production AWS account. The developer must roll back the function if issues are found. Which solution will meet these requirements with the LEAST operational overhead?

A. Deploy the Lambda function to the development, testing, and production accounts separately after successfully testing the function in each environment.
B. Update the Lambda function code to use environment variables for the development, testing, and production accounts. Use the environment variables to make code updates available to specific environments.
C. Use Lambda layers to separate the code and the libraries that are associated with each AWS account.
Deploy and test the Lambda function with each Lambda layer in each environment.
D. Create new Lambda function versions and aliases for the development, testing, and production accounts. After successful testing, update the production alias to point to the function. Roll back to the most recent stable function version if issues are discovered.

Answer: D

Explanation:
Using Versions and Aliases is the native AWS Lambda mechanism for managing deployments. A version is an immutable snapshot of your code and configuration. An alias (like " PROD " ) is a pointer to a specific version. By updating the alias to point to a new version, you promote code. If a bug is found, you simply point the alias back to the previous version, enabling an instantaneous rollback with minimal overhead.

NEW QUESTION # 626
A developer creates a static website for their department The developer deploys the static assets for the website to an Amazon S3 bucket and serves the assets with Amazon CloudFront The developer uses origin access control (OAC) on the CloudFront distribution to access the S3 bucket The developer notices users can access the root URL and specific pages but cannot access directories without specifying a file name. For example, /products/index.html works, but /products returns an error The developer needs to enable accessing directories without specifying a file name without exposing the S3 bucket publicly.
Which solution will meet these requirements'?

A. Update the CloudFront distribution's settings to index.html as the default root object is set
B. Create a custom error response on the CloudFront distribution with the HTTP error code set to the HTTP 404 Not Found response code and the response page path to /index html Set the HTTP response code to the HTTP 200 OK response code
C. Update the Amazon S3 bucket settings and enable static website hosting. Specify index html as the Index document Update the S3 bucket policy to enable access. Update the CloudFront distribution's origin to use the S3 website endpoint
D. Create a CloudFront function that examines the request URL and appends index.html when directories are being accessed Add the function as a viewer request CloudFront function to the CloudFront distribution's behavior.

Answer: A

Explanation:
Explanation
The simplest and most efficient way to enable accessing directories without specifying a file name is to update the CloudFront distribution's settings to index.html as the default root object. This will instruct CloudFront to return the index.html object when a user requests the root URL or a directory URL for the distribution. This solution does not require enabling static website hosting on the S3 bucket, creating a CloudFront function, or creating a custom error response. References
* Specifying a default root object
* cloudfront-default-root-object-configured
* How to setup CloudFront default root object?
* Ensure a default root object is configured for AWS Cloudfront ...

NEW QUESTION # 627
A company uses more than 100 AWS Lambda functions to handle application services. One Lambda function is critical and must always run successfully. The company notices that occasionally, the critical Lambda function does not initiate. The company investigates the issue and discovers instances of the Lambda TooManyRequestsException: Rate Exceeded error in Amazon CloudWatch logs. Upon further review of the logs, the company notices that some of the non-critical functions run properly while the critical function fails. A developer must resolve the errors and ensure that the critical Lambda function runs successfully. Which solution will meet these requirements with the LEAST operational overhead?

A. Configure reserved concurrency for the critical Lambda function. Set reserved concurrent executions to the appropriate level.
B. Configure provisioned concurrency for the critical Lambda function. Set provisioned concurrent executions to the appropriate level.
C. Configure CloudWatch alarms for TooManyRequestsException errors. Add Amazon EventBridge as an action for the alarm state change. Use EventBridge to invoke the critical function again after a failure.
D. Configure CloudWatch alarms for TooManyRequestsException errors. Add the critical Lambda function as an alarm state change action to invoke the critical function again after a failure.

Answer: A

Explanation:
Reserved concurrency guarantees a specific number of concurrent executions for a critical Lambda function. This ensures that the critical function always has sufficient resources to execute, even if other functions are consuming concurrency.
Why Option A:
Ensures Function Availability: Reserved concurrency isolates the critical Lambda function from other functions.
Low Overhead: Configuring reserved concurrency is straightforward and requires minimal setup.
Why Not Other Options:
Option B: Provisioned concurrency is ideal for reducing cold starts, not for managing execution limits.
Option C & D: Alarms and re-invocation mechanisms add complexity without resolving the root cause.
Reference:
Managing Concurrency for AWS Lambda

NEW QUESTION # 628
A developer has a legacy application that is hosted on-premises. Other applications hosted on AWS depend on the on-premises application for proper functioning. In case of any application errors, the developer wants to be able to use Amazon CloudWatch to monitor and troubleshoot all applications from one place.
How can the developer accomplish this?

A. Upload log files from the on-premises server to an Amazon EC2 instance and have the instance forward the logs to CloudWatch.
B. Upload log files from the on-premises server to Amazon S3 and have CloudWatch read the files.
C. Install an AWS SDK on the on-premises server to automatically send logs to CloudWatch.
D. Download the CloudWatch agent to the on-premises server. Configure the agent to use IAM user credentials with permissions for CloudWatch.

Answer: D

Explanation:
Explanation
Amazon CloudWatch is a service that monitors AWS resources and applications. The developer can use CloudWatch to monitor and troubleshoot all applications from one place. To do so, the developer needs to download the CloudWatch agent to the on-premises server and configure the agent to use IAM user credentials with permissions for CloudWatch. The agent will collect logs and metrics from the on-premises server and send them to CloudWatch.
References:
[What Is Amazon CloudWatch? - Amazon CloudWatch]
[Installing and Configuring the CloudWatch Agent - Amazon CloudWatch]

NEW QUESTION # 629
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. Perform a BatchGetltem 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.
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. 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

Answer: B

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

NEW QUESTION # 630
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