PCA Promql Practice Question
Which TWO of the following statements about 'rate' vs 'irate' are correct?
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
✓
rate() is better for alerting on slow-moving counters.
rate is better for smooth graphs, irate is for high-precision local spikes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
irate() returns the average over the whole window.
Why it's wrong here
That is the behavior of rate().
- ✓
rate() is better for alerting on slow-moving counters.
Why this is correct
rate() provides a smoother average over time.
- ✗
irate() is better for long-term trends.
Why it's wrong here
irate is too noisy for long-term trends.
- ✓
irate() calculates the rate based on the last two points.
Why this is correct
This is the core definition of irate.
- ✗
rate() only works on gauges.
Why it's wrong here
rate() is for counters.
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.