100% Pass 2026 Amazon DVA-C02: AWS Certified Developer - Associate Latest Valid Study Questions

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Amazon DVA-C02 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Troubleshooting and Optimization18%- Assist in a root cause analysis
  • 1. Error handling and retries
  • 2. AWS X-Ray
  • 3. Application logging
  • 4. AWS CloudTrail
  • 5. Amazon CloudWatch Logs
- Optimize applications by using AWS services and features
  • 1. Data storage optimization
  • 2. Caching strategies (ElastiCache, CloudFront)
  • 3. Cost optimization
  • 4. Concurrency and throttling
  • 5. Memory and compute optimization
- Instrument code for observability
  • 1. Custom metrics
  • 2. AWS X-Ray
  • 3. Amazon CloudWatch metrics
  • 4. Structured logging
  • 5. Amazon CloudWatch alarms
Topic 2: Security26%- Implement encryption by using AWS services
  • 1. AWS KMS
  • 2. AWS CloudHSM
  • 3. AWS Certificate Manager
  • 4. AWS Secrets Manager
  • 5. Amazon S3 encryption
- Implement authentication and/or authorization for applications and AWS services
  • 1. Bearer tokens (JWT, OAuth, AWS STS)
  • 2. Role-based access control (RBAC)
  • 3. Resource-based policies, service policies, and principal policies
  • 4. User pools and identity pools in Amazon Cognito
  • 5. Identity federation (SAML, OpenID Connect, Amazon Cognito)
- 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
Topic 3: Development with AWS Services32%- Develop code for applications hosted on AWS
  • 1. Amazon Cognito
  • 2. Amazon SNS
  • 3. AWS CloudFormation
  • 4. Amazon DynamoDB
  • 5. Amazon S3
  • 6. AWS SDKs
  • 7. Amazon API Gateway
  • 8. AWS CLI
  • 9. Amazon SQS
  • 10. AWS Lambda
- Use data stores in application development
  • 1. Amazon ElastiCache
  • 2. Amazon RDS
  • 3. Amazon DynamoDB
  • 4. Amazon S3
  • 5. Amazon EFS
- Develop code for AWS serverless applications
  • 1. Amazon EventBridge
  • 2. Amazon API Gateway
  • 3. AWS Step Functions
  • 4. AWS AppSync
Topic 4: Deployment24%- Automate deployment testing
  • 1. AWS CodeCommit
  • 2. AWS CodePipeline
  • 3. AWS CodeBuild
  • 4. AWS CodeDeploy
- Deploy code by using AWS CI/CD services
  • 1. Blue/green deployments
  • 2. AWS CodeCommit
  • 3. GitHub integration
  • 4. AWS CodePipeline
  • 5. Canary deployments
  • 6. AWS CodeBuild
  • 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 SAM
  • 5. AWS CDK
- Test applications in development environments
  • 1. Mocking AWS services
  • 2. AWS SAM local
  • 3. Local testing of Lambda functions

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Amazon AWS Certified Developer - Associate Sample Questions (Q110-Q115):

NEW QUESTION # 110
A stock trading company is developing a mobile app that provides near real-time market data and historical trading analytics to thousands of professional traders who make trades concurrently. The app needs to provide market data to traders in under 100 milliseconds. Historical analytics charts can take 2- 3 seconds to generate.
The app needs to be highly available and handle market events that cause sudden spikes in trading activity.
Some trades involve messages that are over 1 MB in size.
The company must provide equal market access to all traders. The company must ensure that all traders experience the same performance when they use the app.
Which solution will meet these requirements?

Answer: B

Explanation:
The correct answer is A because the workload needs shared, low-latency, highly available caching for all traders. ElastiCache Redis OSS in cluster mode distributes data across shards and supports read replicas, which improves read scalability and protects against node failure. Write-through caching keeps near real-time market data consistent in the cache as updates occur, giving all traders access to the same fresh data path instead of relying on device-local caches. Lazy loading with TTL is appropriate for historical analytics because those results can tolerate a few seconds of generation time and can be cached after first access. DynamoDB with DAX is weaker here because DynamoDB items have a 400 KB maximum size, while the scenario includes messages over 1 MB. Single-node Redis is not highly available.


NEW QUESTION # 111
A developer is adding new functionality to an existing application that was initially built by using the AWS CDK. The developer creates a new Lambda function and needs to deploy it. Which AWS CDK command must the developer use to prepare the new Lambda function for deployment?

Answer: D

Explanation:
The cdk synth command synthesizes the AWS CDK app into an AWS CloudFormation template, which includes the new Lambda function definition. This step prepares the resources for deployment by generating the template that will be deployed to AWS.


NEW QUESTION # 112
A developer is creating an AWS Lambda function that needs network access to private resources in a VPC.

Answer: A

Explanation:
Comprehensive Detailed Step by Step Explanation with All AWS Developer References:
When you need to provide an AWS Lambda function access to private resources in a VPC, the most common and straightforward approach is to attach the Lambda function to a VPC via private subnets. Once the Lambda function is associated with the VPC, you need to configure appropriate security groups to control the access to the private resources.
* Lambda with VPC Access: Lambda functions can be attached to private subnets in a VPC, allowing them to access resources like RDS, EC2, or internal services within that VPC.
* Security Groups: A security group acts as a virtual firewall for the Lambda function, ensuring that it can access only the necessary resources and ports in the VPC.
* Alternatives:
* Option Binvolves routing traffic through a VPN, which adds unnecessary complexity and operational overhead compared to simply attaching the Lambda to the VPC.
* Option Crequires configuring a VPC endpoint and a NAT gateway, which can be complex and costly.
* Option Drefers to AWS PrivateLink, which is used to access services over private connections, but it's unnecessary in this scenario unless you need a cross-VPC connection.


NEW QUESTION # 113
A company introduced a new feature that should be accessible to only a specific group of premium customers. A developer needs the ability to turn the feature on and off in response to performance and feedback. The developer needs a solution to validate and deploy these configurations quickly without causing any disruptions.
What should the developer do to meet these requirements?

Answer: C


NEW QUESTION # 114
A company is using an AWS Lambda function to process records from an Amazon Kinesis data stream. The company recently observed slow processing of the records. A developer notices that the iterator age metric for the function is increasing and that the Lambda run duration is constantly above normal.
Which actions should the developer take to increase the processing speed? (Choose two.)

Answer: B,D

Explanation:
https://aws.amazon.com/premiumsupport/knowledge-center/lambda-iterator-age/


NEW QUESTION # 115
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