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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Security	26%	- Implement authentication and/or authorization for applications and AWS services 1. User pools and identity pools in Amazon Cognito 2. Resource-based policies, service policies, and principal policies 3. Identity federation (SAML, OpenID Connect, Amazon Cognito) 4. Bearer tokens (JWT, OAuth, AWS STS) 5. Role-based access control (RBAC) - Manage sensitive data in application code 1. AWS Systems Manager Parameter Store 2. Encryption of data at rest and in transit 3. AWS Secrets Manager 4. Environment variables - Implement encryption by using AWS services 1. Amazon S3 encryption 2. AWS KMS 3. AWS Secrets Manager 4. AWS Certificate Manager 5. AWS CloudHSM
Topic 2: Deployment	24%	- Test applications in development environments 1. AWS SAM local 2. Local testing of Lambda functions 3. Mocking AWS services - Automate deployment testing 1. AWS CodeDeploy 2. AWS CodePipeline 3. AWS CodeCommit 4. AWS CodeBuild - Deploy code by using AWS CI/CD services 1. AWS CodeDeploy 2. Rolling deployments 3. Blue/green deployments 4. GitHub integration 5. Canary deployments 6. AWS CodePipeline 7. AWS CodeCommit 8. AWS CodeBuild - Prepare application artifacts to be deployed to AWS 1. Lambda deployment packages 2. AWS SAM 3. AWS CloudFormation 4. AWS CDK 5. Docker containers
Topic 3: Development with AWS Services	32%	- Develop code for applications hosted on AWS 1. Amazon SQS 2. AWS SDKs 3. AWS CLI 4. Amazon S3 5. AWS CloudFormation 6. Amazon DynamoDB 7. Amazon SNS 8. Amazon API Gateway 9. AWS Lambda 10. Amazon Cognito - Develop code for AWS serverless applications 1. AWS AppSync 2. Amazon EventBridge 3. Amazon API Gateway 4. AWS Step Functions - Use data stores in application development 1. Amazon EFS 2. Amazon ElastiCache 3. Amazon RDS 4. Amazon S3 5. Amazon DynamoDB
Topic 4: Troubleshooting and Optimization	18%	- Optimize applications by using AWS services and features 1. Cost optimization 2. Data storage optimization 3. Concurrency and throttling 4. Caching strategies (ElastiCache, CloudFront) 5. Memory and compute optimization - Instrument code for observability 1. Amazon CloudWatch alarms 2. Structured logging 3. Amazon CloudWatch metrics 4. AWS X-Ray 5. Custom metrics - Assist in a root cause analysis 1. Amazon CloudWatch Logs 2. AWS CloudTrail 3. Application logging 4. Error handling and retries 5. AWS X-Ray

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Amazon AWS Certified Developer - Associate Sample Questions (Q213-Q218):

NEW QUESTION # 213
A developer is working on an ecommerce platform that communicates with several third-party payment processing APIs. The third-party payment services do not provide a test environment.
The developer needs to validate the ecommerce platform's integration with the third-party payment processing APIs. The developer must test the API integration code without invoking the third-party payment processing APIs.
Which solution will meet these requirements?

A. Set up an Amazon API Gateway REST API with a gateway response configured for status code
200. Add response templates that contain sample responses captured from the real third-party API.
B. Set up an AWS AppSync GraphQL API with a data source configured for each third-party API.
Specify an integration type of Mock. Configure integration responses by using sample responses captured from the real third-party API.
C. Create an AWS Lambda function for each third-party API. Embed responses captured from the real third-party API. Configure Amazon Route 53 Resolver with an inbound endpoint for each Lambda function's Amazon Resource Name (ARN).
D. Set up an Amazon API Gateway REST API for each third-party API. Specify an integration request type of Mock. Configure integration responses by using sample responses captured from the real third-party API.

Answer: D

Explanation:
https://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-mock-integration.html

NEW QUESTION # 214
A company has an AWS Step Functions state machine named myStateMachine. The company configured a service role for Step Functions. The developer must ensure that only the myStateMachine state machine can assume the service role.

A. "Condition": { "ArnLike": { "aws
":"arn:aws:states:ap-south-1:111111111111:stateMachine
" } }
B. "Condition": { "ArnLike": { "aws
":"arn:aws:states:ap-south-1:*:stateMachine
" } }

Answer: A

Explanation:
Comprehensive Detailed Step by Step Explanation with All AWS Developer References:To ensure that only a specific AWS Step Functions state machine (myStateMachine) can assume the service role, you must configure the correct trust policy in AWS IAM.
* Trust Policies: Trust policies determine which entities (services or users) are allowed to assume the role. In this case, we want to restrict the trust policy to only allow the specific state machine (myStateMachine) to assume the role.
* Using ArnLike: The condition "ArnLike" is used to specify that the SourceArn (which refers to the ARN of the entity assuming the role) must match a specific ARN. Option A specifies the exact ARN of the myStateMachine state machine, ensuring that only this state machine can assume the role.
* Option B: This option is incorrect because it uses a wildcard (*) for the account ID, which would allow any state machine in the ap-south-1 region to assume the role, not just the specific one.

NEW QUESTION # 215
A company's new mobile app uses Amazon API Gateway. As the development team completes a new release of its APIs, a developer must safely and transparently roll out the API change.
What is the SIMPLEST solution for the developer to use for rolling out the new API version to a limited number of users through API Gateway?

A. Use the canary release deployment option in API Gateway. Direct a percentage of the API traffic using the canarySettings setting.
B. Implement an Amazon CloudWatch alarm to trigger a rollback if the observed HTTP 500 status code rate exceeds a predetermined threshold.
C. Create a new API in API Gateway. Direct a portion of the traffic to the new API using an Amazon Route 53 weighted routing policy.
D. Validate the new API version and promote it to production during the window of lowest expected utilization.

Answer: A

NEW QUESTION # 216
A developer maintains an Amazon API Gateway REST API. Customers use the API through a frontend UI and Amazon Cognito authentication.
The developer has a new version of the API that contains new endpoints and backward-incompatible interface changes. The developer needs to provide beta access to other developers on the team without affecting customers.
Which solution will meet these requirements with the LEAST operational overhead?

A. Specify new API Gateway endpoints for the API endpoints that the developer wants to add.
B. Implement a query parameter in the API application code that determines which code version to call.
C. Define a new API Gateway API that points to the new API application code. Instruct the other developers to point the endpoints to the new API.
D. Define a development stage on the API Gateway API. Instruct the other developers to point the endpoints to the development stage.

Answer: D

Explanation:
Amazon API Gateway is a service that enables developers to create, publish, maintain, monitor, and secure APIs at any scale. The developer can define a development stage on the API Gateway API and instruct the other developers to point the endpoints to the development stage. This way, the developer can provide beta access to the new version of the API without affecting customers who use the production stage. This solution will meet the requirements with the least operational overhead.

NEW QUESTION # 217
A developer is creating a role to access Amazon S3 buckets. To create the role, the developer uses the AWS CLI create-role command. Which policy should be added to allow the Amazon EC2 service to assume the role?

A. Managed policy
B. Trust policy
C. Service control policy (SCP)
D. Inline policy

Answer: B

Explanation:
A trust policy defines which entities (such as AWS services like EC2) are allowed to assume a role. To allow the EC2 service to assume the role, the developer must add a trust policy specifying EC2 as a trusted principal.

NEW QUESTION # 218
......

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