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 runs the AWS CLI command to invoke a Lambda function synchronously. What does the output indicate?
The Lambda function executed successfully and returned a response.
StatusCode 200 indicates success, and response.json contains the output.
The Lambda function failed validation.
Why wrong: Validation errors return 400.
The Lambda function was not found.
Why wrong: Not found returns 404.
The Lambda function timed out.
Why wrong: Timeout would throw an error.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The Lambda function executed successfully and returned a response.
When you invoke a Lambda function synchronously using the AWS CLI (e.g., `aws lambda invoke --function-name myFunction --payload '{}' output.txt`), a successful execution returns an HTTP 200 status code and the function's response in the output file. The CLI also returns metadata indicating the status, such as `StatusCode: 200` and `ExecutedVersion: $LATEST`, confirming the function ran to completion and returned a response.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The Lambda function executed successfully and returned a response.
Why this is correct
StatusCode 200 indicates success, and response.json contains the output.
Related concept
Read the scenario before looking for a memorised answer.
The Lambda function failed validation.
Why it's wrong here
Validation errors return 400.
The Lambda function was not found.
Why it's wrong here
Not found returns 404.
The Lambda function timed out.
Why it's wrong here
Timeout would throw an error.
Common exam traps
The trap here is that candidates may assume a synchronous invocation always returns a response, but they must check for the `FunctionError` field in the output to distinguish between a successful execution and a failure like a timeout or unhandled exception.
Detailed technical explanation
Synchronous invocation (RequestResponse) is commonly used for API Gateway integrations or manual testing. Under the hood, the Lambda service waits for the function to complete and returns the response payload, but if the function exceeds its configured timeout (max 15 minutes), the invocation is terminated and an error is returned. The CLI output includes a `FunctionError` field only when the function throws an unhandled exception or times out, which distinguishes a successful response from a failure.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
Quick reference
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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FAQ
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
The correct answer is: The Lambda function executed successfully and returned a response. — When you invoke a Lambda function synchronously using the AWS CLI (e.g., `aws lambda invoke --function-name myFunction --payload '{}' output.txt`), a successful execution returns an HTTP 200 status code and the function's response in the output file. The CLI also returns metadata indicating the status, such as `StatusCode: 200` and `ExecutedVersion: $LATEST`, confirming the function ran to completion and returned a response.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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.
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