PCA Alerting And Dashboarding Practice Question
Where do you define the threshold for a Prometheus alerting rule?
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
✓
In the 'expr' field
The threshold is part of the PromQL query expression within the 'expr' field of the alerting rule.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
In the 'labels' field
Why it's wrong here
Labels are for metadata.
- ✗
In the Alertmanager config
Why it's wrong here
Alertmanager handles alerts after they are generated.
- ✓
In the 'expr' field
Why this is correct
The query expression contains the threshold logic.
- ✗
In the Grafana panel
Why it's wrong here
Grafana thresholds are for visualization, not rule generation.
About these practice questions
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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.