DVA-C02AWS Certified Developer – Associate
What the exam covers
Study guide
From AWS
About DVA-C02
The application developer’s view of AWS: Lambda, API Gateway, DynamoDB, SQS, SNS and Step Functions from the SDK side, plus how code is deployed and observed. It goes deeper into API behaviour, limits and error handling than Solutions Architect does.
Who it's for. Developers who build and ship serverless or container-based applications on AWS.
How to prepare
- DynamoDB is everywhere on this exam: partition key design, GSIs vs LSIs, consistent reads, and capacity calculations.
- Know the deployment types: CodeDeploy in-place vs blue/green, Lambda aliases with traffic shifting, and Elastic Beanstalk deployment policies.
- Practise the credential chain and STS. Many security questions turn on where the SDK finds credentials.
Sample DVA-C02 questions
Try these with the answers on the page, then practise the full bank.
- A Node.js function runs on AWS Lambda and must query a PostgreSQL database that sits in private subnets with no public IP address. The function is currently deployed with default networking. What should the team change? Development with AWS services
- A mobile game lets players sign in with Google or Facebook and then upload save files directly to a per-player S3 prefix. The app needs temporary AWS credentials for that upload. Which Cognito component provides them? Security
- A healthcare startup must guarantee that plaintext patient files never reach AWS storage servers, even briefly, and the encryption keys must stay under the company's control. Which approach meets both requirements? Security
- A Lambda function reads a database password from a plaintext environment variable. The team wants the secret removed from configuration, rotated regularly, and fetched at runtime. What should they use? Security
- Inside a resource property, a template should read a database endpoint that is stored in SSM Parameter Store, and it should do so at deploy time without declaring a template parameter. Which syntax accomplishes this? Deployment
- A DynamoDB read path has become slow only during busy afternoons. Which CloudWatch metric should be checked first to see whether requests are being rejected for lack of read throughput? Troubleshooting and optimization
- A REST API forwards requests to a Lambda function that raises errors whose text contains NotFound or Conflict. Clients should receive 404 or 409 respectively. The Lambda code must stay unchanged. Which configuration achieves this? Development with AWS services
- A team schedules deletion of a KMS customer managed key. What happens next? Security
- All 19 sample questions
Questions people ask
Is this DVA-C02 practice exam free?
Yes. All 200 questions, the timed mock exam and the explanations are free, and there's no account to create.
Are these real exam questions?
No. Real exam questions are confidential under the AWS candidate agreement. These are practice questions written to cover the same domains in the same scenario style, each with an explanation of why the answer is right.
How is the DVA-C02 mock exam scored?
Questions are drawn from every domain in proportion to the exam guide, and you get a raw percentage with a breakdown by domain. AWS uses scaled scoring, so treat 75% or more here as a sign you're ready rather than a predicted score.
Where is my progress saved?
In your browser, on this device. Nothing is sent to us apart from the answers you check, and clearing site data resets it.