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Amazon DVA-C02 Exam Syllabus Topics:

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

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Amazon AWS Certified Developer - Associate Sample Questions (Q451-Q456):

NEW QUESTION # 451
A developer is creating a microservices application that runs across multiple compute environments.
The application must securely access secrets that are stored in AWS Secrets Manager with minimal network latency. The developer wants a solution that reduces the number of direct calls to Secrets Manager and simplifies secrets management across environments. Which solution will meet these requirements with the LEAST operational overhead?

A. Install the Secrets Manager Agent in each compute environment. Configure the agent to cache secrets locally. Securely retrieve the secrets from Secrets Manager as needed.
B. Create a custom script that retrieves secrets directly from Secrets Manager and caches the secrets in a local database for each compute environment.
C. Implement lazy loading logic in the application to fetch secrets directly from Secrets Manager and to cache the secrets in Redis.
D. Store the secrets in an Amazon S3 bucket. Retrieve and load the secrets as environment variables during application startup for each compute environment.

Answer: A

Explanation:
The Secrets Manager Agent provides an out-of-the-box solution for securely caching secrets locally, reducing latency and operational overhead.
* Why Option B is Correct:
* Caching: The agent securely caches secrets locally, minimizing Secrets Manager API calls.
* Security: Secrets remain secure during retrieval and storage.
* Low Operational Overhead: Managed solution eliminates the need for custom logic.
* Why Not Other Options:
* Option A: Custom scripts introduce complexity and require ongoing maintenance.
* Option C: Using Redis requires managing an additional service, increasing overhead.
* Option D: Storing secrets in S3 lacks the fine-grained security controls of Secrets Manager.
References:
* Caching Secrets in AWS Secrets Manager

NEW QUESTION # 452
A developer is designing a serverless application for a game in which users register and log in through a web browser. The application makes requests on behalf of users to a set of AWS Lambda functions that run behind an Amazon API Gateway HTTP API.
The developer needs to implement a solution to register and log in users on the application's sign-in page. The solution must minimize operational overhead and must minimize ongoing management of user identities.
Which solution will meet these requirements?

A. Program the sign-in page to create users' IAM groups with the IAM roles attached to the groups.
B. Create Amazon Cognito user pools for external social identity providers. Configure IAM roles for the identity pools.
C. Configure the sign-in page to register and store the users and their passwords in an Amazon DynamoDB table with an attached IAM policy.
D. Create an Amazon RDS for SQL Server DB instance to store the users and manage the permissions to the backend resources in AWS.

Answer: D

NEW QUESTION # 453
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 CloudFormation stack is deployed. Which combination of steps will meet these requirements? (Choose two.)

A. 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.
B. Add the state machine as a target of the EventBridge rule.
C. Create a pipe in Amazon EventBridge Pipes that has a source of the EventBridge rule. Set the state machine as a target.
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 AWS Lambda function to invoke the state machine.

Answer: A,B

Explanation:
Amazon EventBridge can match AWS CloudFormation stack status change events for a specific stack and then directly start an AWS Step Functions state machine as the target. This removes the need for intermediary components such as Lambda and provides the simplest event-driven way to run the tests when the matching stack deployment event occurs.

NEW QUESTION # 454
A software engineer developed an AWS Lambda function in Node.js to do some CPU-intensive data processing. With the default settings, the Lambda function takes about 5 minutes to complete. Which approach should a developer take to increase the speed of completion?

A. Allocate the maximum available CPU units to the function.
B. Increase the available memory to the function.
C. Instead of using Node.js, rewrite the Lambda function using Python.
D. Instead of packaging the libraries in the ZIP file with the function, move them to a Lambda layer and use the layer with the function.

Answer: B

Explanation:
In AWS Lambda, increasing the memory allocation not only gives the function more RAM, but also proportionally increases the CPU power. For CPU-intensive workloads, this is the most effective way to speed up execution time, as more compute power is granted automatically with higher memory.

NEW QUESTION # 455
A developer is creating a script to automate the deployment process for a serverless application.
The developer wants to use an existing AWS Serverless Application Model (AWS SAM) template for the application.
What should the developer use for the project? (Choose two.)

A. Call aws cloudformation package to create the deployment package. Call aws cloudformation deploy to deploy the package afterward.
B. Create a ZIP package locally and call aws serverlessrepo create-applicatiion to create the application.
C. Call sam package to create the deployment package. Call sam deploy to deploy the package afterward.
D. Create a ZIP package and upload it to Amazon S3. Call aws cloudformation create-stack to create the application.
E. Call aws s3 cp to upload the AWS SAM template to Amazon S3. Call aws lambda update- function-code to create the application.

Answer: A,C

NEW QUESTION # 456
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