- A
Knative
Why wrong: Knative is a serverless framework on Kubernetes, but it requires cluster management and may not scale to zero as efficiently as a FaaS platform.
- B
Apache Kafka
Why wrong: Apache Kafka is a distributed streaming platform, not designed for serverless function execution.
- C
A Functions-as-a-Service (FaaS) platform
A FaaS platform provides event-driven serverless functions that scale to zero and are ideal for processing events from object storage.
- D
Kubernetes CronJob
Why wrong: Kubernetes CronJob is for scheduled tasks, not event-driven processing, and does not automatically scale to zero.
Question 57 of 997
Functions-as-a-Service (FaaS) — Serverless Event Processing for Kubernetes
This KCNA practice question tests your understanding of cloud native architecture. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: knative. 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 company wants to implement a serverless function that processes events from an object storage bucket. The function should scale to zero when idle and only incur costs during execution. Which technology is BEST suited for this requirement?
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
✓
A Functions-as-a-Service (FaaS) platform
Option C is correct. A Functions-as-a-Service (FaaS) platform is a serverless compute service that scales to zero when idle and is event-driven, making it ideal for processing events from an object storage bucket with cost efficiency. Option A (Knative) is serverless but runs on Kubernetes, requiring cluster management and not scaling to zero as cleanly. Option B (Apache Kafka) is a streaming platform, not a serverless function service. Option D (Kubernetes CronJob) is for scheduled jobs, not event-driven, and does not scale to zero automatically.
Key principle: Knative
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Knative
Why it's wrong here
Knative is a serverless framework on Kubernetes, but it requires cluster management and may not scale to zero as efficiently as a FaaS platform.
- ✗
Apache Kafka
Why it's wrong here
Apache Kafka is a distributed streaming platform, not designed for serverless function execution.
- ✓
A Functions-as-a-Service (FaaS) platform
Why this is correct
A FaaS platform provides event-driven serverless functions that scale to zero and are ideal for processing events from object storage.
Related concept
Knative
- ✗
Kubernetes CronJob
Why it's wrong here
Kubernetes CronJob is for scheduled tasks, not event-driven processing, and does not automatically scale to zero.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may mistakenly think that Knative requires always-on pods, but Knative's autoscaler scales to zero when no requests are incoming.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Knative
- Scale to Zero
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
Knative
Real-world example
How this comes up in practice
A practitioner preparing for the KCNA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Knative Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Review knative, then practise related KCNA questions on the same topic to reinforce the concept.
- →
Cloud Native Architecture — study guide chapter
Learn the concepts, then practise the questions
- →
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Targeted practice on this topic area only
- →
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- →
Kubernetes and Cloud Native Associate KCNA study guide
Full concept coverage aligned to exam objectives
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KCNA practice test guide
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FAQ
Questions learners often ask
What does this KCNA question test?
Cloud Native Architecture — This question tests Cloud Native Architecture — Knative.
What is the correct answer to this question?
The correct answer is: A Functions-as-a-Service (FaaS) platform — Option C is correct. A Functions-as-a-Service (FaaS) platform is a serverless compute service that scales to zero when idle and is event-driven, making it ideal for processing events from an object storage bucket with cost efficiency. Option A (Knative) is serverless but runs on Kubernetes, requiring cluster management and not scaling to zero as cleanly. Option B (Apache Kafka) is a streaming platform, not a serverless function service. Option D (Kubernetes CronJob) is for scheduled jobs, not event-driven, and does not scale to zero automatically.
What should I do if I get this KCNA question wrong?
Review knative, then practise related KCNA questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Knative
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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.
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