KCNA Cloud Native Application Delivery Practice Question
A Kubernetes cluster runs a critical application that must be updated with zero downtime. The team wants to gradually shift traffic from the old version to the new version over a period of time. Which deployment pattern is MOST appropriate?
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
✓
Canary deployment
Canary deployment involves rolling out the new version to a small subset of users initially and gradually increasing traffic while monitoring for issues. This minimizes risk and provides control over the rollout.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Rolling update
Why it's wrong here
Rolling update replaces pods incrementally but does not provide fine-grained traffic shifting; it is a simple phased replacement.
- ✗
Recreate deployment
Why it's wrong here
Recreate terminates all old pods before creating new ones, causing downtime.
- ✗
Blue-green deployment
Why it's wrong here
Blue-green deployment switches traffic all at once from the old to the new version after validation, but does not gradually shift traffic over a period.
- ✓
Canary deployment
Why this is correct
Canary deployment gradually shifts a percentage of traffic to the new version, allowing monitoring and controlled rollout.
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Same concept, more angles
1 more way this is tested on KCNA
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A DevOps team wants to adopt a deployment pattern where a new version of an application is gradually rolled out to a small subset of users before full deployment. Which progressive delivery technique should they use?
medium- ✓ A.Canary deployment
- B.Rolling update
- C.Blue-green deployment
- D.Recreate deployment
Why A: Canary deployment releases the new version to a small percentage of users initially, then gradually increases traffic.
JA
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.