KCNA Cloud Native Architecture Practice Question
Which TWO of the following are common characteristics of serverless computing? (Choose two.)
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
✓
Auto-scaling to zero when idle
Event-driven execution and auto-scaling to zero are key serverless characteristics.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Auto-scaling to zero when idle
Why this is correct
Idle functions consume no resources.
- ✓
Event-driven execution
Why this is correct
Functions are triggered by events like HTTP requests or messages.
- ✗
Manual scaling based on predicted load
Why it's wrong here
Scaling is automatic in serverless.
- ✗
Always-on dedicated servers
Why it's wrong here
Serverless is ephemeral and scales to zero.
- ✗
Long-running stateful processes
Why it's wrong here
Serverless functions are typically stateless and short-lived.
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 |
Go deeper
Related to this question
Learn chapter
Cloud Native Application Design Principles
Key term
Serverless computing
Serverless computing is a cloud execution model where the cloud provider dynamically manages the allocation and provisioning of servers, allowing developers to write and deploy code without thinking about the underlying infrastructure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.