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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Development with AWS Services	32%	- Write code for applications hosted on AWS 1. Implement architectural patterns 2. Use AWS SDKs and APIs 3. Develop serverless applications - Integrate AWS services into applications 1. Use AWS Lambda, API Gateway, Amazon EventBridge 2. Implement messaging and event-driven workflows - Interact with AWS data services 1. Implement caching and data storage strategies 2. Work with Amazon DynamoDB, Amazon S3
Security	26%	- Apply security best practices 1. Validate application security configurations 2. Follow AWS Well-Architected Framework security principles - Secure application data 1. Manage secrets and credentials securely 2. Implement encryption at rest and in transit - Implement authentication and authorization 1. Manage IAM roles, policies, and permissions 2. Use Amazon Cognito for identity management
Troubleshooting and Optimization	18%	- Optimize application performance 1. Optimize resource usage and costs 2. Improve latency and throughput - Troubleshoot application issues 1. Use Amazon CloudWatch, AWS X-Ray for monitoring 2. Analyze logs, metrics, and traces - Debug and resolve errors 1. Resolve integration and configuration problems 2. Identify and fix code defects
Deployment	24%	- Implement CI/CD pipelines 1. Automate deployment and testing workflows 2. Use AWS CodePipeline, CodeBuild, CodeDeploy - Prepare application artifacts for deployment 1. Package code and dependencies 2. Use infrastructure as code (AWS CloudFormation, AWS SAM) - Deploy applications on AWS 1. Perform safe updates and rollbacks 2. Deploy to AWS Lambda, Amazon EC2, Elastic Beanstalk

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Amazon AWS Certified Developer - Associate Sample Questions (Q210-Q215):

NEW QUESTION # 210
A developer is using AWS Amplify Hosting to build and deploy an application. The developer is receiving an increased number of bug reports from users. The developer wants to add end-to-end testing to the application to eliminate as many bugs as possible before the bugs reach production.
Which solution should the developer implement to meet these requirements?

A. Run the amplify add test command in the Amplify CLI.
B. Add a test phase to the amplify.yml build settings for the application.
C. Add a test phase to the aws-exports.js file for the application.
D. Create unit tests in the application. Deploy the unit tests by using the amplify push command in the Amplify CLI.

Answer: B

Explanation:
The solution that will meet the requirements is to add a test phase to the amplify.yml build settings for the application. This way, the developer can run end-to-end tests on every code commit and catch any bugs before deploying to production. The other options either do not support end-to-end testing, or do not run tests automatically.
Reference: End-to-end testing

NEW QUESTION # 211
A company notices that credentials that the company uses to connect to an external software as a service (SaaS) vendor are stored in a configuration file as plaintext.
The developer needs to secure the API credentials and enforce automatic credentials rotation on a quarterly basis.
Which solution will meet these requirements MOST securely?

A. Use AWS Key Management Service (AWS KMS) to encrypt the configuration file. Decrypt the configuration file when users make API calls to the SaaS vendor. Enable rotation.
B. Store the credentials in AWS Systems Manager Parameter Store and enable rotation. Retrieve the credentials when users make API calls to the SaaS vendor.
C. Store the credentials in AWS Secrets Manager and enable rotation. Configure the API to have Secrets Manager access.
D. Retrieve temporary credentials from AWS Security Token Service (AWS STS) every 15 minutes.
Use the temporary credentials when users make API calls to the SaaS vendor.

Answer: C

NEW QUESTION # 212
A developer is writing an application to analyze the traffic to a fleet of Amazon EC2 instances.
The EC2 instances run behind a public Application Load Balancer (ALB). An HTTP server runs on each of the EC2 instances, logging all requests to a log file.
The developer wants to capture the client public IP addresses. The developer analyzes the log files and notices only the IP address of the ALB.
What must the developer do to capture the client public IP addresses in the log file?

A. Install the AWS X-Ray daemon on each EC2 instance. Configure the daemon to write to the log file.
B. Install the Amazon CloudWatch Logs agent on each EC2 instance. Configure the agent to write to the log file.
C. Add a Host header to the HTTP server log configuration file.
D. Add an X-Forwarded-For header to the HTTP server log configuration file.

Answer: D

NEW QUESTION # 213
A developer at a company has created a repository in AWS CodeArtifact. The company's development team needs to receive notification when new packages are published to the repository. How can the developer meet this requirement with the LEAST operational overhead?

A. Create an AWS Step Functions state machine that notifies the development team through Amazon SES.Use Amazon EventBridge to invoke the Step Functions state machine.
B. Create an AWS Lambda function that notifies the development team through Amazon SES. Use Amazon EventBridge to invoke the Lambda function.
C. Create an Amazon SNS topic. Subscribe the development team ' s email address to the SNS topic. Use Amazon EventBridge to notify the SNS topic.
D. Create an Amazon SNS topic. Subscribe the development team ' s email address to the SNS topic.
Associate the SNS topic ' s Amazon Resource Name (ARN) with the repository.

Answer: C

Explanation:
AWS CodeArtifact publishes events to Amazon EventBridge when a package is created, modified, or deleted.
The most operationally efficient (serverless) way to send an email notification from an EventBridge event is to set an Amazon SNS topic as the target. The team subscribes to the SNS topic. This avoids the need to write and maintain custom Lambda code (Option B) or Step Functions (Option D).

NEW QUESTION # 214
A company is creating an AWS Step Functions state machine to run a set of tests for an application. The tests need to run when a specific AWS Cloud Formation stack is deployed.
Which combination of steps will meet these requirements? (Choose two.)

A. Create a pipe in Amazon EventBridge Pipes that has a source of the EventBridge rule. Set the state machine as a target.
B. Add the state machine as a target of the EventBridge rule.
C. Create an AWS Lambda function to invoke the state machine.
D. Create a pipe in Amazon EventBridge Pipes that has a source of the default event bus. Set the Lambda function as a target. Filter on a detail type of CloudFormation stack status change, a status of UPDATE_IN_PROGRESS, and the stack ID of the CloudFormation stack.
E. Create an Amazon EventBridge rule on the default bus that matches on a detail type of CloudFormation stack status change, a status of UPDATE_IN_PROGRESS, and the stack ID of the CloudFormation stack.

Answer: B,C

NEW QUESTION # 215
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