Question 1mediummultiple choice
Full question →DVA-C02 · topic practice
Development With AWS Services practice questions
Use this page to practise DVA-C02 Development With AWS Services practice questions. The goal is not to memorise dumps, but to understand the concept, review the explanation and improve your exam readiness.
What the exam tests
What to know about Development With AWS Services
Cloud concepts questions usually test the service model (IaaS/PaaS/SaaS) and deployment model (public/private/hybrid/community) appropriate for a given scenario.
IaaS, PaaS and SaaS responsibilities and examples.
Public, private, hybrid and community cloud deployment models.
On-premises vs cloud trade-offs: cost, control, scalability.
How cloud connectivity options (VPN, Direct Connect, ExpressRoute) work.
Practice set
Development With AWS Services questions
20 questions · select your answer, then reveal the explanation
Question 2mediummultiple choice
Full question →A developer has an AWS Lambda function that processes messages from an Amazon SQS standard queue. The function is idempotent and currently has a batch size of 10. The developer wants to increase throughput and increases the batch size to 100. After the change, CloudWatch metrics show a significant increase in throttles and the queue backlog is growing. The function's reserved concurrency is set to 10. What is the most effective action to resolve the throttling and improve throughput?
Question 3mediummultiple choice
Full question →A developer is managing an application running on Amazon EC2 instances behind an Application Load Balancer. Users report that the application becomes unresponsive after several hours, and restarting the instance temporarily fixes the issue. The developer suspects a memory leak but cannot add custom instrumentation. Which AWS service can collect memory utilization metrics and help identify the memory leak with minimal configuration?
Question 4easymultiple choice
Full question →A developer is building a serverless web application using AWS Lambda and Amazon DynamoDB. The application needs to perform complex aggregations on data stored in DynamoDB. Which AWS service should the developer use to perform these aggregations efficiently without reading all the data into Lambda?
Question 5easymultiple choice
Full question →A developer has an Amazon S3 bucket containing private user documents. The application must generate a time-limited URL for users to download their own documents without requiring the users to have AWS credentials. Which solution should the developer use?
Question 6mediummultiple choice
Full question →A developer is building a serverless application using AWS Step Functions to orchestrate multiple AWS Lambda functions. One of the Lambda functions occasionally fails due to a transient error. The developer wants the Step Functions execution to automatically retry the failed task up to three times with exponential backoff. Which configuration should the developer set in the Step Functions state machine definition?
Question 7hardmultiple choice
Full question →A developer is troubleshooting an AWS Lambda function that processes large CSV files (up to 1 GB) uploaded to an Amazon S3 bucket. The function uses Python and the pandas library to perform data transformations. Recently, the function started timing out on large files. CloudWatch Logs show that the function's execution time is close to the 15-minute Lambda timeout, and memory utilization peaks at around 80% of the configured 3,008 MB. The function has not been modified in months. Which action will most likely resolve the timeout issue without requiring code changes?
Question 8mediummultiple choice
Full question →A developer is debugging an issue where an Amazon S3 bucket policy is not allowing cross-account access for a user from another AWS account. The bucket policy grants access to the other account's root user. The IAM user in the other account has an IAM policy that allows s3:GetObject on the bucket. When the user tries to download an object, they get an Access Denied error. What is the most likely cause?
Question 9mediummultiple choice
Full question →A developer is monitoring an AWS Lambda function that processes messages from an SQS queue. CloudWatch metrics show that the function's throttles are high when the queue backlog grows. The function has a reserved concurrency of 50 and a batch size of 10. The SQS queue has a visibility timeout of 30 seconds. The function processes each batch in about 5 seconds. Which action will most effectively reduce throttles?
Question 10mediummultiple choice
Full question →A developer is deploying a web application on AWS Elastic Beanstalk. The environment must maintain the same number of running instances throughout the deployment to ensure capacity. The developer also wants to minimize downtime. Which deployment policy should be used?
Question 11hardmultiple choice
Full question →A developer is troubleshooting an AWS Lambda function that experiences high latency for the first few invocations after being idle. The function is written in Python and uses a large library (e.g., Pandas). The function connects to an RDS database in a VPC. What is the most effective way to reduce the latency for the first invocation after idle?
Question 12mediummultiple choice
Full question →A developer is troubleshooting an AWS Lambda function that is triggered by an S3 event. The function occasionally fails with a timeout error. CloudWatch logs show that the timeout occurs during the processing of large files. The function has a memory setting of 128 MB and a timeout of 3 seconds. The developer wants to process large files without modifying the code. Which parameter should the developer adjust first?
Question 13mediummultiple choice
Full question →A developer notices that an AWS Lambda function, configured to access an Amazon RDS database in the same VPC, is timing out. The function has a 30-second timeout. CloudWatch Logs show that the function starts execution but never reaches the database. The VPC configuration includes private subnets without a NAT gateway. The RDS database is in the same VPC. What is the most likely cause of the timeout?
Question 14mediummultiple choice
Full question →A developer is using the AWS Serverless Application Model (SAM) to define a serverless application with an API Gateway endpoint. The developer wants to enable API caching only in the development stage to speed up testing, but disable it in the production stage to ensure data freshness. What is the most efficient way to achieve this with SAM?
Question 15mediummultiple choice
Full question →A developer is building a serverless application that uses Amazon S3 event notifications to trigger an AWS Lambda function for thumbnail generation. The developer wants to ensure that duplicate S3 events do not cause the same image to be processed multiple times. Which approach should the developer implement to ensure idempotent processing?
Question 16hardmultiple choice
Full question →A developer is migrating a monolithic application to a microservices architecture on AWS. The application uses a relational database. The developer wants to use Amazon RDS for the database and needs to ensure that each microservice can only access its own set of tables. Which approach should the developer take?
Question 17hardmultiple choice
Full question →A developer deployed an AWS Lambda function that is invoked by an Amazon SQS queue. The function is configured with a batch size of 10 and a timeout of 30 seconds. CloudWatch metrics show that the function's Duration is consistently around 28 seconds, but occasionally spikes to 35 seconds causing timeouts. The function makes a synchronous HTTP call to an external API. Which approach will MOST effectively prevent timeouts while maximizing throughput?
Question 18easymultiple choice
Full question →A developer is building a RESTful API that allows clients to query a database and retrieve results. The backend logic is implemented in AWS Lambda, which queries an Amazon DynamoDB table. The developer wants to expose the API over HTTPS and manage authentication and throttling. Which AWS service should the developer use to create and manage the API endpoints?
Question 19mediummultiple choice
Full question →A developer is building a serverless application that uses an Amazon SQS FIFO queue to process orders. The orders must be processed exactly once and in the order they are received. The developer uses an AWS Lambda function as the consumer. Despite using a FIFO queue, the developer notices that some orders are being processed more than once. What is the most likely cause of this behavior?
Question 20mediummultiple choice
Full question →A company uses AWS Elastic Beanstalk to run a web application. They want to deploy a new version with zero downtime and roll forward if successful. They have two environments: a production environment (current version) and a staging environment (new version). After verifying the staging environment, they want to swap the URLs so that production now points to the new version. Which deployment strategy should they use?
Watch out for
Common Development With AWS Services exam traps
- ▸IaaS gives you infrastructure control; SaaS gives you only the application.
- ▸Hybrid cloud combines on-premises and public cloud — not two public clouds.
- ▸Cloud does not automatically mean cheaper or more secure.
- ▸Management responsibility shifts with each service model (IaaS → PaaS → SaaS).
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Frequently asked questions
- What does the DVA-C02 exam test about Development With AWS Services?
- Cloud concepts questions usually test the service model (IaaS/PaaS/SaaS) and deployment model (public/private/hybrid/community) appropriate for a given scenario.
- How should I use these practice questions?
- Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
- Can I practise just Development With AWS Services questions in a focused session?
- Yes — the session launcher on this page draws every question from the Development With AWS Services domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
- Where can I practise other DVA-C02 topics?
- Use the topic links above to move to related areas, or go back to the DVA-C02 question bank to see all topics.
- Are these real exam questions or dumps?
- These are original practice questions written to test the same concepts the DVA-C02 exam covers. They are not copied from any real exam or dump site.
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Exam traps to avoid
- ▸IaaS gives you infrastructure control; SaaS gives you only the application.
- ▸Hybrid cloud combines on-premises and public cloud — not two public clouds.
- ▸Cloud does not automatically mean cheaper or more secure.
- ▸Management responsibility shifts with each service model (IaaS → PaaS → SaaS).