PCA Instrumentation And Exporters Practice Question
Why are metric names required to follow a specific character set (e.g., alphanumeric and colons)?
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
✓
For compatibility with PromQL
Prometheus metric names must match a regex to ensure they are compatible with the query language and internal storage format.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
For compatibility with PromQL
Why this is correct
The language syntax requires strictly formatted names.
- ✗
For faster scraping
Why it's wrong here
Scraping speed is not related to naming rules.
- ✗
To save disk space
Why it's wrong here
This has no impact on storage size.
- ✗
To prevent duplicate metrics
Why it's wrong here
Duplicates are prevented by labels, not names.
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.