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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Troubleshooting and Optimization	18%	- Performance optimization 1. Application performance tuning 2. Fault tolerance and resilience patterns - Monitoring and logging 1. Amazon CloudWatch metrics and logs
Topic 2: Development with AWS Services	32%	- Application development and integration 1. Event-driven architectures with SNS/SQS 2. API Gateway and REST APIs - AWS core services development 1. Amazon DynamoDB integration patterns 2. Amazon S3 usage in applications 3. AWS Lambda functions development
Topic 3: Security	26%	- Application authentication and authorization 1. Cognito user authentication 2. IAM roles and policies - Data security 1. Secure API access patterns 2. Encryption using AWS KMS
Topic 4: Deployment	24%	- CI/CD and deployment strategies 1. AWS CodeBuild and CodeDeploy usage 2. AWS CodePipeline workflows - Infrastructure as code 1. AWS CloudFormation templates

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Amazon AWS Certified Developer - Associate Sample Questions (Q280-Q285):

NEW QUESTION # 280
A developer is deploying a company's application to Amazon EC2 instances. The application generates gigabytes of data files each day. The files are rarely accessed, but the files must be available to the application's users within minutes of a request during the first year of storage.
The company must retain the files for 7 years.
How can the developer implement the application to meet these requirements MOST cost- effectively?

A. Store the files in an Amazon S3 bucket. Use the S3 Glacier Instant Retrieval storage class.
Create an S3 Lifecycle policy to transition the files to the S3 Glacier Deep Archive storage class after 1 year.
B. Store the files in an Amazon S3 bucket. Use the S3 Standard storage class. Create an S3 Lifecycle policy to transition the files to the S3 Glacier Flexible Retrieval storage class after 1 year.
C. Store the files on an Amazon Elastic Block Store (Amazon EBS) volume. Use Amazon Data Lifecycle Manager (Amazon DLM) to create snapshots of the EBS volumes and to store those snapshots in Amazon S3.
D. Store the files on an Amazon Elastic File System (Amazon EFS) mount. Configure EFS lifecycle management to transition the files to the EFS Standard- Infrequent Access (Standard-IA) storage class after 1 year.

Answer: A

Explanation:
https://aws.amazon.com/s3/storage-classes/

NEW QUESTION # 281
A development team has an Amazon API Gateway REST API that is backed by an AWS Lambda function.
Users have reported performance issues for the Lambda function. The development team identified the source of the issues as a cold start of the Lambda function. The development team needs to reduce the time needed for the Lambda function to initialize.
Which solution will meet this requirement?

A. Increase the timeout of the Lambda function.
B. Increase the memory allocation of the Lambda function.
C. Change the Lambda concurrency to reserved concurrency.
D. Configure provisioned concurrency for the Lambda function.

Answer: D

NEW QUESTION # 282
An Amazon Data Firehose delivery stream is receiving customer data that contains personally identifiable information. A developer needs to remove pattern-based customer identifiers from the data and store the modified data in an Amazon S3 bucket.
What should the developer do to meet these requirements?

A. Create an AWS Step Functions workflow to remove the customer identifiers. As the last step in the workflow, store the transformed data in an Amazon S3 bucket. Set the workflow as the destination of the delivery stream.
B. Implement Firehose data transformation as an AWS Lambda function. Configure the function to remove the customer identifiers. Set an Amazon S3 bucket as the destination of the delivery stream.
C. Create an Amazon OpenSearch Service instance. Set the OpenSearch Service instance as the destination of the delivery stream. Use search and replace to remove the customer identifiers.
Export the data to an Amazon S3 bucket.
D. Launch an Amazon EC2 instance. Set the EC2 instance as the destination of the delivery stream.
Run an application on the EC2 instance to remove the customer identifiers. Store the transformed data in an Amazon S3 bucket.

Answer: B

NEW QUESTION # 283
A banking company is building an application for users to create accounts, view balances, and review recent transactions. The company integrated an Amazon API Gateway REST API with AWS Lambda functions. The company wants to deploy a new version of a Lambda function that gives customers the ability to view their balances. The new version of the function displays customer transaction insights. The company wants to test the new version with a small group of users before deciding whether to make the feature available for all users. Which solution will meet these requirements with the LEAST disruption to users?

A. Redeploy the REST API stage to use the new version of the function. If issues are detected, update the REST API to point to the previous version of the function.
B. Create a new REST API stage for the new version of the function. Create a weighted alias record set in Amazon Route 53 to distribute traffic between the original stage and the new stage.
C. Create a canary deployment for the REST API. Gradually increase traffic to the new version of the function. Revert traffic to the old version if issues are detected.
D. Deploy the new version of the function to a new stage in the REST API. Route traffic to the new stage. If the new version fails, route traffic to the original stage.

Answer: C

Explanation:
API Gateway's canary deployments allow gradual traffic shifting to a new version of a function, minimizing disruption while testing.
Gradual Rollout: Reduces risk by incrementally increasing traffic.
Rollback Support: Canary deployments make it easy to revert to the previous version.

NEW QUESTION # 284
A developer must cache dependent artifacts from Maven Central, a public package repository, as part of an application's build pipeline. The build pipeline has an AWS CodeArtifact repository where artifacts of the build are published. The developer needs a solution that requires minimum changes to the build pipeline.
Which solution meets these requirements?

A. Create a new CodeArtifact domain that contains a new repository that has an external connection to the public package repository.
B. Create a new CodeArtifact repository that has an external connection to the public package repository.
C. Modify the existing CodeArtifact repository to associate an upstream repository with the public package repository.
D. Modify the CodeArtifact repository resource policy to allow artifacts to be fetched from the public package repository.

Answer: C

NEW QUESTION # 285
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