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Amazon DVA-C02 Exam Syllabus Topics:

SectionWeightObjectives
Deployment24%- Implement CI/CD pipelines
  • 1. Automate deployment and testing workflows
  • 2. Use AWS CodePipeline, CodeBuild, CodeDeploy
- Deploy applications on AWS
  • 1. Deploy to AWS Lambda, Amazon EC2, Elastic Beanstalk
  • 2. Perform safe updates and rollbacks
- Prepare application artifacts for deployment
  • 1. Package code and dependencies
  • 2. Use infrastructure as code (AWS CloudFormation, AWS SAM)
Security26%- Apply security best practices
  • 1. Follow AWS Well-Architected Framework security principles
  • 2. Validate application security configurations
- Secure application data
  • 1. Implement encryption at rest and in transit
  • 2. Manage secrets and credentials securely
- Implement authentication and authorization
  • 1. Use Amazon Cognito for identity management
  • 2. Manage IAM roles, policies, and permissions
Troubleshooting and Optimization18%- Optimize application performance
  • 1. Optimize resource usage and costs
  • 2. Improve latency and throughput
- Troubleshoot application issues
  • 1. Analyze logs, metrics, and traces
  • 2. Use Amazon CloudWatch, AWS X-Ray for monitoring
- Debug and resolve errors
  • 1. Resolve integration and configuration problems
  • 2. Identify and fix code defects
Development with AWS Services32%- 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. Work with Amazon DynamoDB, Amazon S3
  • 2. Implement caching and data storage strategies
- Write code for applications hosted on AWS
  • 1. Use AWS SDKs and APIs
  • 2. Implement architectural patterns
  • 3. Develop serverless applications

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Amazon AWS Certified Developer - Associate Sample Questions (Q165-Q170):

NEW QUESTION # 165
A developer must use multi-factor authentication (MFA) to access data in an Amazon S3 bucket that is in another AWS account.
Which AWS Security Token Service (AWS STS) API operation should the developer use with the MFA information to meet this requirement?

Answer: D


NEW QUESTION # 166
A developer registered an AWS Lambda function as a target for an Application Load Balancer (ALB) using a CLI command. However, the Lambda function is not being invoked when the client sends requests through the ALB.
Why is the Lambda function not being invoked?

Answer: D

Explanation:
An Application Load Balancer can invoke Lambda functions as targets, but ALB must be explicitly granted permission to invoke the function. This is done by adding a resource-based permission to the Lambda function policy that allows the Elastic Load Balancing service principal to call lambda:InvokeFunction, typically scoped to the specific target group ARN.
If the developer registers the function as a target but does not add the required permission, the ALB will not be able to invoke the function when requests arrive. This is a common integration oversight: the target registration succeeds, but invocation fails because Lambda denies the call.
Option A is incorrect because ALB does support Lambda targets.
Option B is incorrect because Lambda targets can be configured through the console, CLI, or APIs.
Option D is unrelated: cross-zone load balancing affects distribution of traffic across AZs for instance/IP targets, not whether Lambda invocation is authorized.


NEW QUESTION # 167
A company built a new application in the AWS Cloud. The company automated the bootstrapping of new resources with an Auto Scaling group by using AWS Cloudf-ormation templates. The bootstrap scripts contain sensitive data.
The company needs a solution that is integrated with CloudFormation to manage the sensitive data in the bootstrap scripts.
Which solution will meet these requirements in the MOST secure way?

Answer: D

Explanation:
This solution meets the requirements in the most secure way because it uses a service that is integrated with CloudFormation to manage sensitive data in encrypted form. AWS Systems Manager Parameter Store provides secure, hierarchical storage for configuration data management and secrets management. You can store sensitive data as secure string parameters, which are encrypted using an AWS Key Management Service (AWS KMS) key of your choice. You can also use dynamic references in your CloudFormation templates to specify template values that are stored in Parameter Store or Secrets Manager without having to include them in your templates. Dynamic references are resolved only during stack creation or update operations, which reduces exposure risks for sensitive data. Putting sensitive data into a CloudFormation parameter will not encrypt them or protect them from unauthorized access. Putting sensitive data into an Amazon S3 bucket or Amazon Elastic File System (Amazon EFS) will require additional configuration and integration with CloudFormation and may not provide fine-grained access control or encryption for sensitive data.


NEW QUESTION # 168
A developer is building various microservices for an application that will run on Amazon EC2 instances. The developer needs to monitor the end-to-end view of the requests between the microservices and debug any issues in the various microservices.
What should the developer do to accomplish these tasks?

Answer: D

Explanation:
To monitor end-to-end requests and debug issues acrossmicroservices, you needdistributed tracing. Among AWS tools,AWS X-Rayis specifically built for this use case.
Step-by-Step Breakdown:
Step 1: Understand the Requirement
The developer needs:
* End-to-end request tracingacross microservices
* Debugging capabilityfor performance issues or failures
* This points directly to adistributed tracing solutionrather than just logs or metrics.
Step 2: Evaluate the Options
Option A: Amazon CloudWatch
* CloudWatch is powerful formetrics,logs, andalerts.
* But it does not providedistributed tracingorrequest path visualizationbetween microservices.
* So, it'snot sufficient alonefor the requirement.
Option B: AWS CloudTrail
* CloudTrail tracksAPI callsmade through the AWS Management Console, CLI, SDKs.
* It is meant forauditing and governance, not microservices request tracing.
* Not suitable for debugging microservices interactions.
Option C: AWS X-Ray SDK with X-Ray service map
* #Purpose-built fordistributed tracing
* Automatically collects data about requestsas they travel through your microservices
* You caninstrumentyour code with the AWS X-Ray SDK inJava, Node.js, Python, Go, .NET, etc.
* Visualizes requests using aservice map, showing latency, errors, and time spent in downstream services.
How it works:
* Instrument each microserviceusing the AWS X-Ray SDK.
* Use the SDK totrace requests, propagate trace headers across services.
* TheX-Ray daemoncollects and sends trace data to the X-Ray service.
* You can view theservice map, see bottlenecks, error rates, etc.
Option D: AWS Health
* AWS Health provides information onAWS service outagesor account-level events.
* It doesnotmonitor yourapplication or microserviceshealth or request flows.
Correct Choice: Cis the only option that meets the developer's requirement to monitorend-to-end request pathsand debug issues in amicroservicesarchitecture.
AWS Developer References:
* AWS X-Ray Documentation:https://docs.aws.amazon.com/xray/latest/devguide/aws-xray.html
* Instrumenting your application:https://docs.aws.amazon.com/xray/latest/devguide/xray-sdk.html
* Viewing the Service Map:https://docs.aws.amazon.com/xray/latest/devguide/xray-console-service-map.
html
* Tracing Microservices with AWS X-Ray:https://aws.amazon.com/blogs/compute/tracing-microservices- aws-x-ray/


NEW QUESTION # 169
A developer is building a highly secure healthcare application using serverless components. This application requires writing temporary data to /tmp storage on an AWS Lambda function.
How should the developer encrypt this data?

Answer: D


NEW QUESTION # 170
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