PCA Instrumentation And Exporters Practice Question
When using the Prometheus Go client, what is the difference between a Gauge and a GaugeVec?
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
✓
GaugeVec supports labels
A Gauge represents a single value, whereas a GaugeVec allows you to have multiple gauges identified by a set of variable labels.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Gauge is faster
Why it's wrong here
Performance impact is negligible.
- ✗
GaugeVec is for Histograms
Why it's wrong here
GaugeVec is specifically for Gauges.
- ✗
There is no difference
Why it's wrong here
There is a significant difference in functionality.
- ✓
GaugeVec supports labels
Why this is correct
GaugeVec is used for metrics that require dimensions (labels).
About these practice questions
This PCA question is part of Courseiva's 304-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.