PCA Promql Practice Question
What is the behavior of the clamp_max() function when applied to an instant vector?
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 restricts all values in the vector so that none exceed the specified maximum.
clamp_max clamps the values of all time series in the vector to a specified maximum upper limit.
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 drops any time series whose value exceeds the specified maximum.
Why it's wrong here
clamp_max alters values; it does not drop time series.
- ✗
It generates an alert if any time series exceeds the maximum.
Why it's wrong here
Functions modify data; they do not trigger alerts directly.
- ✓
It restricts all values in the vector so that none exceed the specified maximum.
Why this is correct
Correct. Values above the maximum are set to the maximum value.
- ✗
It sets values exceeding the maximum to NaN.
Why it's wrong here
Values are capped at the maximum limit, not converted to NaN.
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.