PCA Promql Practice Question
Which TWO of the following statements about PromQL label matchers are correct? (Choose TWO)
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
✓
The = operator performs an exact string match.
PromQL supports exact equality (=), negative equality (!=), regular expression matching (=~), and negative regular expression matching (!~).
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 = operator performs an exact string match.
Why this is correct
Correct. = is exact match.
- ✗
The ?= operator performs fuzzy string matching.
Why it's wrong here
?= does not exist in PromQL.
- ✗
The =~ operator is used exclusively for numeric comparisons.
Why it's wrong here
=~ is for regular expression string matching, not numeric comparisons.
- ✗
The == operator is valid inside label selectors for filtering.
Why it's wrong here
== is a binary comparison operator, not a label selector matcher.
- ✓
The !~ operator performs a negative regular expression match.
Why this is correct
Correct. !~ matches series where the label does not match the regex.
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.