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The Amazon DVA-C01 exam covers a wide range of domains, which are enumerated below:

Refactoring – 10%
This topic is focused on the students’ knowledge of AWS services as well as the features that are included in it. They also have to demonstrate their competence in optimizing the applications for using the best features of AWS services and migrating the existing application code to run on AWS.
Security – 26%
This domain validates the applicants’ understanding of encryption and authentication methods. They have to be good at implementing encryption using AWS services, implementing applications for authentication & authorization, as well as making authenticated calls to Amazon Web Services.
Development with AWS Service – 30%
This subject area is dedicated to measuring the professionals’ skills in implementing application design into an application code, writing code for serverless applications as well as code that interacts with the AWS services using AWS CLI & APIs, and translating the functional requirements into application designs.
Deployment – 22%
The first exam part evaluates the test takers’ expertise in deploying the written code in Amazon Webs Services using CD/CI pipelines & patterns as well as deploying serverless applications. It is also important that the candidates possess knowledge of how to get ready the deployment package applications so that they can be deployed into AWS and how to deploy applications using Elean Beanstalk.
Monitoring and Troubleshooting – 12%
The last objective is all about the individuals’ skills required to identify faults as well as how to monitor them. The examinees need to have the expertise in performing root cause analysis on all the faults found during production or testing as well as writing code to get it monitored.

Amazon AWS-Certified-Developer-Associate, also known as the AWS Certified Developer - Associate exam, is a certification offered by Amazon Web Services (AWS) to professionals who want to demonstrate their expertise in developing and maintaining applications on the AWS platform. AWS Certified Developer Associate Exam (DVA-C02) certification is designed for developers with at least one year of experience in developing and maintaining AWS-based applications. AWS-Certified-Developer-Associate Exam validates the candidate's ability to design, develop, and deploy scalable, fault-tolerant, and highly available applications on the AWS platform.

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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q105-Q110):

NEW QUESTION # 105
A Developer is receiving HTTP 400: ThrottlingExceptionerrors intermittently when calling the Amazon CloudWatch API. When a call fails, no data is retrieved.
What best practice should first be applied to address this issue?

A. Use the AWS CLI to get the metrics
B. Contact AWS Support for a limit increase.
C. Analyze the applications and remove the API call
D. Retry the call with exponential backoff

Answer: A

NEW QUESTION # 106
A developer is building a web application that uses Amazon API Gateway to expose an AWS Lambda function to process requests from clients. During testing, the developer notices that the API Gateway times out even though the Lambda function finishes under the set time limit.
Which of the following API Gateway metrics in Amazon CloudWatch can help the developer troubleshoot the issue? (Choose two.)

A. CacheHitCount
B. Count
C. IntegrationLatency
D. Latency
E. CacheMissCount

Answer: C,D

Explanation:
Amazon API Gateway is a service that enables developers to create, publish, maintain, monitor, and secure APIs at any scale. Amazon CloudWatch is a service that monitors AWS resources and applications. API Gateway provides several CloudWatch metrics to help developers troubleshoot issues with their APIs. Two of the metrics that can help the developer troubleshoot the issue of API Gateway timing out are:
* IntegrationLatency: This metric measures the time between when API Gateway relays a request to the backend and when it receives a response from the backend. A high value for this metric indicates that the backend is taking too long to respond and may cause API Gateway to time out.
* Latency: This metric measures the time between when API Gateway receives a request from a client and when it returns a response to the client. A high value for this metric indicates that either the integration latency is high or API Gateway is taking too long to process the request or response.
References:
[What Is Amazon API Gateway? - Amazon API Gateway]
[Amazon API Gateway Metrics and Dimensions - Amazon CloudWatch]
[Troubleshooting API Errors - Amazon API Gateway]

NEW QUESTION # 107
A video-hosting website has two types of members: those who pay a fee, and those who do not. Each video upload places a message in Amazon SQS. A fleet of Amazon EC2 instances polls Amazon SQS and processes each video.
The developer needs to ensure that the videos uploaded by the paying members are processed first.
How can the developer meet this requirement?

A. Create two SQS queues; one for paying members, and one for non-paying members. Poll the paying member queue first and then poll the non-paying member queue.
B. Use SQS to set priorities on individual items within a single queue; give the paying members' videos the highest priority.
C. Create two Amazon SNS topics: one for paying members and one for non-paying members. Use SNS topic subscription priorities to differentiate between the two types of members.
D. Use SQS to set priorities on individual items within a single queue and use Amazon SNS to encode the videos.

Answer: B

NEW QUESTION # 108
A developer accesses AWS CodeCommit over SSH. The SSH keys configured to access AWS CodeCommit are tied to a user with the following permissions:
The developer needs to create/delete branches
Which specific IAM permissions need to be added based on the principle of least privilege?

A. Option D
B. Option A
C. Option B
D. Option C

Answer: B

Explanation:
This solution allows the developer to create and delete branches in AWS CodeCommit by granting the codecommit:CreateBranch and codecommit:DeleteBranch permissions. These are the minimum permissions required for this task, following the principle of least privilege. Option B grants too many permissions, such as codecommit:Put*, which allows the developer to create, update, or delete any resource in CodeCommit.
Option C grants too few permissions, such as codecommit:Update*, which does not allow the developer to create or delete branches. Option D grants all permissions, such as codecommit:*, which is not secure or recommended.
Reference: [AWS CodeCommit Permissions Reference], [Create a Branch (AWS CLI)]

NEW QUESTION # 109
A Developer implemented a static website hosted in Amazon S3 that makes web service requests hosted in Amazon API Gateway and AWS Lambda. The site is showing an error that reads:
"No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access." What should the Developer do to resolve this issue?

A. Enable cross-origin resource sharing (CORS) on the S3 bucket.
B. Add the Access-Control-Request-Method header to the request
C. Enable cross-origin resource sharing (CORS) for the method in API Gateway
D. Add the Access-Control-Request-Headers header to the request

Answer: C

Explanation:
Explanation/Reference: https://forums.aws.amazon.com/thread.jspa?threadID=252972

NEW QUESTION # 110
......

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