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Amazon DVA-C02 Exam Syllabus Topics:

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

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Amazon AWS Certified Developer - Associate Sample Questions (Q388-Q393):

NEW QUESTION # 388
A developer is re-architecting a caching solution that currently uses an Amazon ElastiCache (Redis OSS) cluster that has cluster mode enabled to store product information. The existing solution experiences significant load. All cached product data expires at the same time, which results in additional pressure on the backend database and poor performance for end users. The developer must resolve the performance issues in a way that maintains data freshness. Which solution will meet these requirements?

A. Increase the number of replica nodes. Disable cluster mode
B. Increase the number of shards. Decrease the number of replica nodes in the cluster
C. Add a slight variance to the TTL setting by using a randomly generated time value
D. Increase the TTL of the product data in the cache

Answer: C

Explanation:
Adding a small random variation to each product's TTL prevents many cache entries from expiring simultaneously. This distributes cache refreshes over time, avoids a cache stampede against the backend database, and preserves data freshness through normal expiration.

NEW QUESTION # 389
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 ListBucket and GetObject permissions by explicitly adding the S3 bucket's account number in the resource.
B. Grant the CloudFormation service row the S3 GetObfect permission. Add a Bucket policy to Amazon S3 with the principal of "'"
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. 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.

Answer: B

NEW QUESTION # 390
A company has an ecommerce platform. A developer is designing an Amazon DynamoDB table to store customer order data for the platform. The table uses the order ID as the partition key.
The developer needs to modify the table to get all order IDs that are associated with a given customer email address in a single query. The solution must give the developer the ability to query order IDs by other item attributes in the future.
Which solution will meet these requirements?

A. Update the table to use the customer email address as the partition key.
B. Create a global secondary index (GSI) with the customer email address as the partition key.
C. Configure the partition key to use the customer email address as the sort key.
D. Create a local secondary index (LSI) with the customer email address as the sort key.

Answer: B

NEW QUESTION # 391
Given the following AWS CloudFormation template:

What is the MOST efficient way to reference the new Amazon S3 bucket from another AWS CloudFormation template?

A. Use Fn::Include to include the existing template in other templates and use the ContentBucket resource directly.
B. Add Exported: true to the Content.Bucket in the original template and use ImportResource in other templates.
C. Add an Export declaration to the Outputs section of the original template and use ImportValue in other templates.
D. Create a custom AWS CloudFormation resource that gets the bucket name from the ContentBucket resource of the first stack.

Answer: C

Explanation:
By adding an Export declaration to the Outputs section of the original CloudFormation template, you can make the bucket name available for other templates to import and use. This allows you to reference the bucket name directly in other templates without the need for additional resources or custom logic.

NEW QUESTION # 392
A company has built an AWS Lambda function to convert large image files into output files that can be used in a third-party viewer application. The company recently added a new module to the function to improve the output of the generated files. However, the new module has increased the bundle size and has increased the time that is needed to deploy changes to the function code.
How can a developer increase the speed of the Lambda function deployment?

A. Use Amazon S3 to host the function dependencies.
B. Use AWS CodeDeploy to deploy the function code.
C. Use Lambda layers to package and load dependencies.
D. Increase the memory size of the function.

Answer: C

NEW QUESTION # 393
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