PCA Promql Practice Question
Which THREE of the following are valid set operators in PromQL for combining instant vectors? (Choose THREE)
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
✓
unless
PromQL supports three set operators: and (intersection), unless (complement), and or (union).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
intersect
Why it's wrong here
'intersect' is not a PromQL set operator; 'and' is used instead.
- ✗
union
Why it's wrong here
'union' is not a PromQL set operator; 'or' is used instead.
- ✓
unless
Why this is correct
Correct. 'unless' is the complement set operator.
- ✓
and
Why this is correct
Correct. 'and' is the intersection set operator.
- ✓
or
Why this is correct
Correct. 'or' is the union set operator.
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.