CV0-004 Deployment Practice Question
An organization uses Azure DevOps for CI/CD. They want to implement a deployment strategy where a new version of an application is deployed to a small subset of users (e.g., 5%) and if no errors are detected, the percentage is gradually increased to 100%. Which deployment strategy should they use?
⚠ Common exam trap
CV0-004 often tests the confusion between canary (percentage-based gradual traffic shift to a subset of users) and blue/green (two full environments with an all-at-once cutover) — candidates pick blue/green because both involve two versions running simultaneously.
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
Canary deployment routes a small percentage of live traffic (e.g., 5%) to the new version while the majority still hits the stable version, then gradually shifts traffic as health metrics remain clean. Azure DevOps supports this natively via deployment rings, traffic-splitting in App Service/Container Apps, or feature flags. The gradual, metric-gated traffic shift is the defining characteristic of canary.
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
Why it's wrong here
Rolling replaces instances in batches with no user-percentage control, so it cannot direct traffic to 5% of users and scale that share upward. It is tempting because rolling updates do limit downtime during version replacement, and would suit a scenario needing gradual instance-by-instance replacement without user-segmented traffic routing.
- ✗
Recreate
Why it's wrong here
Recreate stops the existing version and starts the new one, so all users switch at once with no percentage-based exposure control. It is tempting because it is the simplest strategy for stateless development or test environments where downtime and instant cutover are acceptable.
- ✓
Canary
Why this is correct
Canary releases route a small percentage of live traffic to the new version, then incrementally shift the remainder once health checks pass. This satisfies the gradual 5%-to-100% rollout with error detection that Azure DevOps pipelines can automate.
- ✗
Blue/green
Why it's wrong here
Blue/green maintains two identical environments and switches all traffic at once via load balancer cutover; it cannot route 5% of users to the new version. Canary deployment shifts incremental traffic percentages. Blue/green suits full releases needing instant rollback with zero mixed-version exposure.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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.