CV0-004 Deployment Practice Question
A cloud engineer is designing a deployment strategy for a web application that requires zero downtime. The engineer has set up two identical production environments, one active and one idle. After deploying the new version to the idle environment, the engineer switches the DNS record to point to the idle environment. This deployment method is known as:
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
✓
Blue/green deployment
Blue/green deployment involves two environments (blue = current, green = new) and switching traffic via DNS or load balancer. Canary and rolling deploy gradually, while A/B testing is for feature comparison.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Blue/green deployment
Why this is correct
Blue/green uses two environments and a switch.
- ✗
Rolling deployment
Why it's wrong here
Rolling updates instances gradually in the same environment.
- ✗
A/B testing deployment
Why it's wrong here
A/B testing is for comparing versions, not necessarily zero-downtime.
- ✗
Canary deployment
Why it's wrong here
Canary shifts a small percentage of traffic initially.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.