PCA Prometheus Fundamentals Practice Question
What label is automatically added by Prometheus to all scraped metrics?
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
✓
instance
Prometheus automatically attaches the 'instance' label to identify the target source.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
instance
Why this is correct
The instance label reflects the target address.
- ✗
region
Why it's wrong here
Region is not a default Prometheus label.
- ✗
job
Why it's wrong here
The job label is usually defined by the user in config.
- ✗
host
Why it's wrong here
Host is not automatically added unless configured.
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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.