PCA Promql Practice Question
Which THREE of the following functions are specifically designed to be used with range 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
✓
delta
Functions like rate(), increase(), and delta() require range vectors as arguments, whereas sum() and max() operate on instant vectors.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
delta
Why this is correct
Correct. delta() takes a range vector.
- ✗
abs
Why it's wrong here
abs operates on instant vectors.
- ✓
rate
Why this is correct
Correct. rate() takes a range vector.
- ✗
sum
Why it's wrong here
sum is an aggregation operator operating on instant vectors.
- ✓
increase
Why this is correct
Correct. increase() takes a range vector.
About these practice questions
This PCA question is part of Courseiva's 304-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.