PCA Instrumentation And Exporters Practice Question
What is the effect of using a 'Summary' metric with client-side quantiles?
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 prevents cross-instance aggregation
Client-side quantiles are calculated per instance, making it impossible to aggregate them across multiple instances of an application.
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 improves performance
Why it's wrong here
It simplifies server-side CPU but limits aggregation.
- ✗
It allows cross-instance aggregation
Why it's wrong here
This is the primary limitation of summaries.
- ✓
It prevents cross-instance aggregation
Why this is correct
Because quantiles are calculated at the source, they cannot be correctly averaged or merged.
- ✗
It doubles the scrape time
Why it's wrong here
Scrape time is not primarily affected by summary types.
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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.