PCA Instrumentation And Exporters Practice Question
You need to monitor the duration of database queries. Which metric type is best for calculating quantiles on the server side?
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
✓
Histogram
Summaries calculate configurable quantiles on the client side, while Histograms require server-side calculations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Gauge
Why it's wrong here
Gauges do not track distributions.
- ✗
Counter
Why it's wrong here
Counters cannot track distributions or quantiles.
- ✗
Summary
Why it's wrong here
Summaries compute quantiles client-side, making them less ideal for aggregation across instances.
- ✓
Histogram
Why this is correct
Histograms allow for the calculation of quantiles on the server side via buckets.
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.