PCA Promql Practice Question
When using 'irate', what is the impact of choosing a range vector that is too small (e.g., [10s])?
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
✓
It captures high-frequency spikes but can be volatile.
irate only looks at the last two data points in the range; if the range is too small, it might miss changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It captures high-frequency spikes but can be volatile.
Why this is correct
irate is sensitive to small fluctuations between the two most recent points.
- ✗
It returns an error if no data points are found.
Why it's wrong here
It returns an empty result, not an error.
- ✗
The result becomes a scalar.
Why it's wrong here
irate always returns a vector.
- ✗
The value is capped at 1.
Why it's wrong here
irate values depend on the metric counter increase.
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.