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Amazon DVA-C02 Exam Syllabus Topics:

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

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Amazon AWS Certified Developer - Associate Sample Questions (Q39-Q44):

NEW QUESTION # 39
A company is developing an ecommerce application that uses Amazon API Gateway APIs. The application uses AWS Lambda as a backend. The company needs to test the code in a dedicated, monitored test environment before the company releases the code to the production environment.
When solution will meet these requirements?

A. Use a single stage in API Gateway. Configure a API client to send a query parameter that indicated the environment. Add different code blocks tor afferent environments in the Lambda Junction to match the value of the query parameter.
B. Use multiple stages in API Gateway. Create a single Lambda function for all environments. Add different code blocks for different environments in the Lambda function based on Lambda environments variables.
C. Use a single stage in API Gateway. Create a Lambda function for each environment. Configure API clients to send a query parameter that indicates the endowment and the specific lambda function.
D. Use multiple stages in API Gateway. Create a Lambda function for each environment. Configure API Gateway stage variables to route traffic to the Lambda function in different environments.

Answer: D

Explanation:
The solution that will meet the requirements is to use multiple stages in API Gateway. Create a Lambda function for each environment. Configure API Gateway stage variables to route traffic to the Lambda function in different environments. This way, the company can test the code in a dedicated, monitored test environment before releasing it to the production environment. The company can also use stage variables to specify the Lambda function version or alias for each stage, and avoid hard-coding the Lambda function name in the API Gateway integration. The other options either involve using a single stage in API Gateway, which does not allow testing in different environments, or adding different code blocks for different environments in the Lambda function, which increases complexity and maintenance.

NEW QUESTION # 40
A developer has code that is stored in an Amazon S3 bucket. The code must be deployed as an AWS Lambda function across multiple accounts in the same AWS Region as the S3 bucket an AWS CloudPormation template that runs for each account will deploy the Lambda function.
What is the MOST secure way to allow CloudFormaton to access the Lambda Code in the S3 bucket?

A. Use a service-based link to grant the Lambda function the S3 GetObject permission Add a resource of"** to allow access to the S3 bucket.
B. Use a service-based link to grant the Lambda function the S3 ListBucket and GetObject permissions by explicitly adding the S3 bucket's account number in the resource.
C. Grant the CloudFormation service role the S3 ListBucket and GetObject permissions. Add a bucket policy to Amazon S3 with the principal of "AWS" (account numbers)
D. Grant the CloudFormation service row the S3 GetObfect permission. Add a Bucket policy to Amazon S3 with the principal of "'"

Answer: D

Explanation:
Explanation
This solution allows the CloudFormation service role to access the S3 bucket from any account, as long as it has the S3 GetObject permission. The bucket policy grants access to any principal with the GetObject permission, which is the least privilege needed to deploy the Lambda code. This is more secure than granting ListBucket permission, which is not required for deploying Lambda code, or using a service-based link, which is not supported for Lambda functions.

NEW QUESTION # 41
A developer has built an application running on AWS Lambda using AWS Serverless Application Model (AWS SAM).
What is the correct sequence of steps to successfully deploy the application?

A. 1. Build the SAM template locally.
2. Deploy the SAM template from Amazon S3.
3. Package the SAM template for use.
B. 1. Build the SAM template locally.
2. Package the SAM template from AWS CodeCommit.
3. Deploy the SAM template to CodeCommit.
C. 1. Build the SAM template locally.
2. Package the SAM template onto Amazon S3.
3. Deploy the SAM template from Amazon S3.
D. 1. Build the SAM template in Amazon EC2.
2. Package the SAM template to Amazon EBS storage.
3. Deploy the SAM template from Amazon EBS.

Answer: C

NEW QUESTION # 42
An application that is deployed to Amazon EC2 is using Amazon DynamoDB. The app cation calls the DynamoDB REST API Periodically the application receives a ProvisionedThroughputExceededException error when the application writes to a DynamoDB table.
Which solutions will mitigate this error MOST cost-effectively

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