PCA Prometheus Fundamentals Practice Question
What happens if a label set for a metric changes during its lifetime?
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 new time series is created
Changing a label set creates a brand new time series in Prometheus.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
An error is logged
Why it's wrong here
This is a normal Prometheus behavior.
- ✓
A new time series is created
Why this is correct
Prometheus treats different label sets as entirely different series.
- ✗
The series is updated in-place
Why it's wrong here
Prometheus series are immutable.
- ✗
The metric is deleted
Why it's wrong here
The old series just stops receiving data.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This PCA practice question is part of Courseiva's free CNCF / Linux Foundation 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 PCA exam.