PCA Prometheus Fundamentals Practice Question
In the Prometheus data model, what is a 'sample'?
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 value and a timestamp
A sample is a value-timestamp pair associated with a specific series.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The metric name
Why it's wrong here
The metric name is part of the identification, not the data point.
- ✗
A label key-value pair
Why it's wrong here
A label is part of the metric identifier.
- ✓
A value and a timestamp
Why this is correct
A sample consists of a float64 value and a millisecond-precision timestamp.
- ✗
An alert rule
Why it's wrong here
An alert rule is a logical construct, not a data sample.
About these practice questions
Courseiva writes every PCA question from scratch — 304 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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.