PCA Promql Practice Question
Which THREE of the following are valid aggregation operators in PromQL? (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
✓
stddev
PromQL provides numerous aggregation operators including sum, min, max, avg, stddev, stdvar, count, count_values, bottomk, topk, and quantile.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
median
Why it's wrong here
median is not a standalone aggregator; quantile is used instead.
- ✗
average
Why it's wrong here
The correct aggregator name is avg, not average.
- ✓
stddev
Why this is correct
Correct. stddev is a valid aggregator.
- ✓
sum
Why this is correct
Correct. sum is a valid aggregator.
- ✓
topk
Why this is correct
Correct. topk is a valid aggregator.
About these practice questions
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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.