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Amazon DVA-C02 Exam Syllabus Topics:

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

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Amazon AWS Certified Developer - Associate Sample Questions (Q430-Q435):

NEW QUESTION # 430
An engineer created an A/B test of a new feature on an Amazon CloudWatch Evidently project.
The engineer configured two variations of the feature (Variation A and Variation B) for the test.
The engineer wants to work exclusively with Variation A. The engineer needs to make updates so that Variation A is the only variation that appears when the engineer hits the application's endpoint.
Which solution will meet this requirement?

A. Add an experiment to the project. Set the identifier of the experiment to the AWS account's account ISet the variation to Variation A.
B. Add an experiment to the project. Set the identifier of the experiment to Variation B. Set the variation to 0%.
C. Add an override to the feature. Set the identifier of the override to Variation A. Set the variation to
100%.
D. Add an override to the feature. Set the identifier of the override to the engineer's user ID. Set the variation to Variation A.

Answer: D

Explanation:
Overrides let you pre-define the variation for selected users. to always receive the editable variation.
https://aws.amazon.com/blogs/aws/cloudwatch-evidently/

NEW QUESTION # 431
A developer is building an application that stores objects in an Amazon S3 bucket. The bucket does not have versioning enabled. The objects are accessed rarely after 1 week. However, the objects must be immediately available at all times. The developer wants to optimize storage costs for the S3 bucket. Which solution will meet this requirement?

A. Create an S3 Lifecycle rule to expire objects after 7 days.
B. Create an S3 Lifecycle rule to transition objects to S3 Glacier Flexible Retrieval after 7 days.
C. Create an S3 Lifecycle rule to delete objects that have delete markers.
D. Create an S3 Lifecycle rule to transition objects to S3 Standard-Infrequent Access (S3 Standard- IA) after 7 days.

Answer: D

Explanation:
Transitioning objects to S3 Standard-Infrequent Access after 7 days moves rarely accessed data to a lower-cost tier while still providing millisecond access when needed. Since versioning isn't enabled, expiration or delete-marker rules aren't applicable, and Glacier tiers would introduce retrieval delays.

NEW QUESTION # 432
A developer maintains applications that store several secrets in AWS Secrets Manager. The applications use secrets that have changed over time. The developer needs to identify required secrets that are still in use. The developer does not want to cause any application downtime.
What should the developer do to meet these requirements?

A. Configure an AWS CloudTrail log file delivery to an Amazon S3 bucket. Create an Amazon CloudWatch alarm for the GetSecretValue. Secrets Manager API operation requests
B. Deactivate the applications secrets and monitor the applications error logs temporarily.
C. Configure AWS X-Ray for the applications. Create a sampling rule lo match the GetSecretValue Secrets Manager API operation requests.
D. Create a secrets manager-secret-unused AWS Config managed rule. Create an Amazon EventBridge rule to Initiate notification when the AWS Config managed rule is met.

Answer: D

Explanation:
This solution will meet the requirements by using AWS Config to monitor and evaluate whether Secrets Manager secrets are unused or have been deleted, based on specified time periods. The secrets manager-secret- unused managed rule is a predefined rule that checks whether Secrets Manager secrets have been rotated within a specified number of days or have been deleted within a specified number of days after last accessed date. The Amazon EventBridge rule will trigger a notification when the AWS Config managed rule is met, alerting the developer about unused secrets that can be removed without causing application downtime.
Option A is not optimal because it will use AWS CloudTrail log file delivery to an Amazon S3 bucket, which will incur additional costs and complexity for storing and analyzing log files that may not contain relevant information about secret usage. Option C is not optimal because it will deactivate the application secrets and monitor the application error logs temporarily, which will cause application downtime and potential data loss.
Option D is not optimal because it will use AWS X-Ray to trace secret usage, which will introduce additional overhead and latency for instrumenting and sampling requests that may not be related to secret usage.

NEW QUESTION # 433
A developer needs to add additional monitoring to an application that runs in an Amazon ECS cluster. The solution must publish and store custom metrics for the application. The developer must be able to save metadata about the custom metrics and store data with a granularity of 1 second. Which solution will meet these requirements?

A. Use the Amazon CloudWatch PutMetricData API to publish the custom metrics. Set the StorageResolution field to 1. Use the dimensions parameter to assign name value pairs to the metrics.
B. Instrument the application to use AWS X-Ray by installing and running the X-Ray daemon. Use the X-Ray SDK to upload custom metrics and metadata through traces. Segment and subsegment data.
C. Use Amazon ECS Container Insights to publish custom metrics from within the application.
Specify high resolution and use the metadata feature to store more data.
D. Monitor the containers by using Amazon ECS Exec. Use Amazon EventBridge Scheduler to run the ECS execute-command CLI command on the cluster to publish custom metrics on a schedule.

Answer: A

Explanation:
Amazon CloudWatch custom metrics support high-resolution data by using the PutMetricData API with StorageResolution set to 1, which stores metrics at 1-second granularity. Dimensions provide name-value metadata that helps categorize and filter the custom metrics for analysis and dashboards.

NEW QUESTION # 434
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. 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).
B. 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.
C. 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.
D. 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.

Answer: B

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

NEW QUESTION # 435
......

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