Question 438 of 833
KCNA Cloud Native Architecture Practice Question
In a serverless architecture using Knative, what happens when a function finishes processing an event and there are no pending events?
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
✓
The function instance is automatically scaled down to zero replicas
Knative scales the function to zero replicas when idle, which is a key feature of serverless platforms.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The function instance is automatically scaled down to zero replicas
Why this is correct
Knative supports auto-scaling to zero when there are no incoming requests.
- ✗
The function instance is terminated and the container image is deleted
Why it's wrong here
The container image is not deleted; it remains available for scaling up.
- ✗
The function continues to run but stops listening for events
Why it's wrong here
The function stops running entirely when scaled to zero.
- ✗
The function instance remains running for a configurable idle timeout
Why it's wrong here
Knative scales to zero, not just to an idle state.
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 |
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 21, 2026
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.