- A
Configure cache key parameters in the method request.
Cache keys determine how responses are cached; they must be defined.
- B
Enable API caching in the stage settings.
This turns on caching for the stage.
- C
Attach a custom domain name to the API.
Why wrong: Custom domain does not enable caching.
- D
Create an API key and usage plan.
Why wrong: API keys are for throttling and access control, not caching.
- E
Deploy the API to an edge-optimized endpoint.
Why wrong: Edge optimization is for latency, not caching.
Question 1,498 of 1,616
API Gateway Caching Configuration
This DVA-C02 practice question tests your understanding of development with aws services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 configuring an Amazon API Gateway REST API with a Lambda function as the backend. The Lambda function returns a JSON response. The developer wants to enable caching to reduce the number of calls to the Lambda function. Which TWO steps are required to enable caching for a specific stage?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure cache key parameters in the method request.
Option A is correct because cache key parameters define which parts of the request (e.g., query strings, headers, or stage variables) are used to create unique cache entries. Without specifying cache key parameters, API Gateway cannot differentiate between requests, and caching may serve stale or incorrect responses. Option B is correct because enabling API caching at the stage level is the prerequisite that activates the cache cluster for that stage; without this toggle, no caching occurs regardless of other settings.
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.
- ✓
Configure cache key parameters in the method request.
Why this is correct
Cache keys determine how responses are cached; they must be defined.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Enable API caching in the stage settings.
Why this is correct
This turns on caching for the stage.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Attach a custom domain name to the API.
Why it's wrong here
Custom domain does not enable caching.
- ✗
Create an API key and usage plan.
Why it's wrong here
API keys are for throttling and access control, not caching.
- ✗
Deploy the API to an edge-optimized endpoint.
Why it's wrong here
Edge optimization is for latency, not caching.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think enabling caching at the stage level alone is sufficient, overlooking the mandatory step of configuring cache key parameters to avoid serving incorrect cached responses for different requests.
Detailed technical explanation
How to think about this question
API Gateway caching uses a dedicated in-memory cache cluster per stage, with a configurable TTL (default 300 seconds) and capacity from 0.5 GB to 237 GB. Cache keys are derived from the method request parameters (query strings, headers, path parameters) and must be explicitly defined; if no cache key parameters are set, only the request body is used, which can lead to collisions. A real-world scenario is an e-commerce API where product IDs are passed as query parameters—without caching, each unique product ID triggers a Lambda invocation, but with proper cache key configuration, repeated requests for the same product ID are served from the cache, reducing Lambda costs and latency.
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.
Quick reference
Cloud Service Model Comparison
| 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 |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
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: Configure cache key parameters in the method request. — Option A is correct because cache key parameters define which parts of the request (e.g., query strings, headers, or stage variables) are used to create unique cache entries. Without specifying cache key parameters, API Gateway cannot differentiate between requests, and caching may serve stale or incorrect responses. Option B is correct because enabling API caching at the stage level is the prerequisite that activates the cache cluster for that stage; without this toggle, no caching occurs regardless of other settings.
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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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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