DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A developer is building a serverless application that needs to process messages from an Amazon SQS queue and store the results in an Amazon DynamoDB table. Which AWS service should the developer use to orchestrate the processing logic without managing servers?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Lambda
AWS Lambda is the correct choice because it is a serverless compute service that can be triggered by SQS messages via event source mappings, process each message, and write results to DynamoDB without provisioning or managing any servers. The developer simply uploads the processing code, and Lambda handles scaling, concurrency, and execution, making it ideal for this event-driven, serverless workflow.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Amazon Elastic Container Service (ECS) with Fargate
Why it's wrong here
ECS with Fargate is serverless but requires container definition and is unnecessary for the stated requirement for simple event processing.
✗
Amazon EC2 instances with a custom application
Why it's wrong here
EC2 requires managing servers and is not serverless.
✓
AWS Lambda
Why this is correct
Lambda is a serverless compute service that can be triggered by SQS and write to DynamoDB.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS Step Functions
Why it's wrong here
Step Functions orchestrates workflows but adds complexity; Lambda alone can handle the processing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Step Functions as a serverless orchestrator for simple tasks, but Step Functions is designed for coordinating multi-step workflows and state machines, not for directly processing individual SQS messages, which is a core Lambda use case.
Detailed technical explanation
How to think about this question
Lambda's SQS event source mapping uses long polling (ReceiveMessage with WaitTimeSeconds up to 20 seconds) to pull messages from the queue, and processes them in batches (default batch size of 10, configurable up to 10,000). If the Lambda function fails to process a message, the message becomes visible again in the queue after the visibility timeout expires, and Lambda automatically retries based on the queue's redrive policy, which can move messages to a dead-letter queue after a specified number of failures.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Lambda — AWS Lambda is the correct choice because it is a serverless compute service that can be triggered by SQS messages via event source mappings, process each message, and write results to DynamoDB without provisioning or managing any servers. The developer simply uploads the processing code, and Lambda handles scaling, concurrency, and execution, making it ideal for this event-driven, serverless workflow.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
Question Discussion
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