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 microservice that needs to invoke another AWS Lambda function and wait for the result to continue processing. Which Lambda invocation type must the developer use to achieve synchronous invocation?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
RequestResponse
The RequestResponse invocation type is the correct choice for synchronous invocation of a Lambda function, where the caller waits for the function to execute and receive a response. This is the default invocation type when using the Invoke API with InvocationType set to 'RequestResponse', and it is required for microservices that need to block until the downstream Lambda returns a result.
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.
✓
RequestResponse
Why this is correct
This invocation type causes the client to wait for the function to execute and return a response, enabling synchronous processing.
Related concept
Read the scenario before looking for a memorised answer.
✗
Event
Why it's wrong here
Event is asynchronous; the client sends the request and returns immediately without waiting for the result.
✗
DryRun
Why it's wrong here
DryRun tests permissions to invoke the function without executing it.
✗
None of the above
Why it's wrong here
There is a valid invocation type for synchronous invocation: RequestResponse.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the Event invocation type (asynchronous) with synchronous behavior, or mistakenly think DryRun is a valid Lambda invocation type, leading them to select 'None of the above' when they don't recognize RequestResponse as the correct term.
Detailed technical explanation
How to think about this question
Under the hood, when you invoke a Lambda function synchronously with RequestResponse, the Invoke API call blocks until the function completes or times out (up to 900 seconds for synchronous invocations). The response includes the function's return payload, status code, and execution logs, making it suitable for request-response patterns like API Gateway integrations or microservice chaining where the caller depends on the result.
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
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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: RequestResponse — The RequestResponse invocation type is the correct choice for synchronous invocation of a Lambda function, where the caller waits for the function to execute and receive a response. This is the default invocation type when using the Invoke API with InvocationType set to 'RequestResponse', and it is required for microservices that need to block until the downstream Lambda returns a result.
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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