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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Troubleshooting and Optimization	18%	- Troubleshoot application issues 1. Use Amazon CloudWatch, AWS X-Ray for monitoring 2. Analyze logs, metrics, and traces - Optimize application performance 1. Improve latency and throughput 2. Optimize resource usage and costs - Debug and resolve errors 1. Resolve integration and configuration problems 2. Identify and fix code defects
Topic 2: Security	26%	- Apply security best practices 1. Follow AWS Well-Architected Framework security principles 2. Validate application security configurations - Secure application data 1. Manage secrets and credentials securely 2. Implement encryption at rest and in transit - Implement authentication and authorization 1. Manage IAM roles, policies, and permissions 2. Use Amazon Cognito for identity management
Topic 3: Development with AWS Services	32%	- Write code for applications hosted on AWS 1. Implement architectural patterns 2. Develop serverless applications 3. Use AWS SDKs and APIs - 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
Topic 4: Deployment	24%	- 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. Use infrastructure as code (AWS CloudFormation, AWS SAM) 2. Package code and dependencies - Implement CI/CD pipelines 1. Use AWS CodePipeline, CodeBuild, CodeDeploy 2. Automate deployment and testing workflows

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Amazon AWS Certified Developer - Associate Sample Questions (Q721-Q726):

NEW QUESTION # 721
A developer is planning to migrate on-premises company data to Amazon S3. The data must be encrypted, and the encryption Keys must support automate annual rotation. The company must use AWS Key Management Service (AWS KMS) to encrypt the data.
When type of keys should the developer use to meet these requirements?

A. Symmetric customer managed keys with key material that is generated by AWS
B. Asymmetric customer managed keys with key material that generated by AWS
C. Amazon S3 managed keys
D. Symmetric customer managed keys with imported key material

Answer: A

Explanation:
The type of keys that the developer should use to meet the requirements is symmetric customer managed keys with key material that is generated by AWS. This way, the developer can use AWS Key Management Service (AWS KMS) to encrypt the data with a symmetric key that is managed by the developer. The developer can also enable automatic annual rotation for the key, which creates new key material for the key every year. The other options either involve using Amazon S3 managed keys, which do not support automatic annual rotation, or using asymmetric keys or imported key material, which are not supported by S3 encryption.
Reference: Using AWS KMS keys to encrypt S3 objects

NEW QUESTION # 722
A developer is creating a mobile application that will not require users to log in.
What is the MOST efficient method to grant users access to AWS resources'?

A. Use an identity provider to securely authenticate with the application.
B. Create an AWS Lambda function to create an 1AM user when a user accesses the application.
C. Use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources.
D. Create credentials using AWS KMS and apply these credentials to users when using the application.

Answer: C

Explanation:
This solution is the most efficient method to grant users access to AWS resources without requiring them to log in. Amazon Cognito is a service that provides user sign-up, sign-in, and access control for web and mobile applications. Amazon Cognito identity pools support both authenticated and unauthenticated users. Unauthenticated users receive access to your AWS resources even if they aren't logged in with any of your identity providers (IdPs). You can use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources, such as Amazon S3 buckets or DynamoDB tables. This degree of access is useful to display content to users before they log in or to allow them to perform certain actions without signing up. Using an identity provider to securely authenticate with the application will require users to log in, which does not meet the requirement. Creating an AWS Lambda function to create an IAM user when a user accesses the application will incur unnecessary costs and complexity, and may pose security risks if not implemented properly. Creating credentials using AWS KMS and applying them to users when using the application will also incur unnecessary costs and complexity, and may not provide fine-grained access control for resources.

NEW QUESTION # 723
When a developer tries to run an AWS Code Build project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters.
What is the recommended solution?

A. Add the export LC-_ALL" on _ US, tuft" command to the pre _ build section to ensure POSIX Localization.
B. Use Amazon Cognate to store key-value pairs for large numbers of environment variables
C. Update the settings for the build project to use an Amazon S3 bucket for large numbers of environment variables
D. Use AWS Systems Manager Parameter Store to store large numbers ot environment variables

Answer: D

Explanation:
This solution allows the developer to overcome the limit for the combined maximum of characters for environment variables in AWS CodeBuild. AWS Systems Manager Parameter Store provides secure, hierarchical storage for configuration data management and secrets management. The developer can store large numbers of environment variables as parameters in Parameter Store and reference them in the buildspec file using parameter references. Adding export LC_ALL="en_US.utf8" command to the pre_build section will not affect the environment variables limit. Using Amazon Cognito or an Amazon S3 bucket to store key- value pairs for environment variables will require additional configuration and integration.
Reference: [Build Specification Reference for AWS CodeBuild], [What Is AWS Systems Manager Parameter Store?]

NEW QUESTION # 724
An application is using Amazon Cognito user pools and identity pools for secure access. A developer wants to integrate the user-specific file upload and download features in the application with Amazon S3. The developer must ensure that the files are saved and retrieved in a secure manner and that users can access only their own files. The file sizes range from 3 KB to 300 MB.
Which option will meet these requirements with the HIGHEST level of security?

A. Save the details of the uploaded files in a separate Amazon DynamoDB table. Filter the list of files in the user interface (UI) by comparing the current user ID with the user ID associated with the file in the table.
B. Use Amazon API Gateway and an AWS Lambda function to upload and download files. Validate each request in the Lambda function before performing the requested operation.
C. Use an IAM policy within the Amazon Cognito identity prefix to restrict users to use their own folders in Amazon S3.
D. Use S3 Event Notifications to validate the file upload and download requests and update the user interface (UI).

Answer: C

Explanation:
This solution ensures that users can access only their own files in a secure manner.
https://docs.aws.amazon.com/cognito/latest/developerguide/amazon-cognito-integrating-user- pools-with-identity-pools.html

NEW QUESTION # 725
A company uses Amazon Simple Queue Service (Amazon SQS) to decouple its microservices architecture. Some messages in an SQS queue contain sensitive information. A developer must implement a solution that encrypts all the data at rest.
Which solution will meet this requirement?

A. Use AWS Certificate Manager (ACM) to generate an SSL/TLS certificate. Reference the certificate when messages are sent to the queue.
B. Use the aws:SecureTransport condition in the queue policy to ensure that only HTTPS (TLS) is used for all requests to the SQS queue.
C. Set a message attribute in the SQS SendMessage request for messages that are sent to the queue. Set the Name to ENCRYPT. Set the Value to TRUE.
D. Enable server-side encryption for the SQS queue by using an SQS managed encryption key (SSE-SQS).

Answer: D

Explanation:
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-server- side-encryption.html

NEW QUESTION # 726
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