KCNA Cloud Native Observability Practice Question
A company defines an SLO that 99.9% of requests to a service should complete in under 200ms. Which metric type is used to measure this SLO?
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
The SLO is based on latency, which is typically measured using a histogram to track request durations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Summary
Why it's wrong here
Summaries also provide quantiles but histograms are more flexible for SLO calculations.
- ✓
Histogram
Why this is correct
Histograms allow calculating quantiles like p99 latency.
- ✗
Gauge
Why it's wrong here
Gauges show current values, not latency distributions.
- ✗
Counter
Why it's wrong here
Counters track cumulative counts, not latency distributions.
Go deeper
Related to this question
About these practice questions
One of 833 original KCNA practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.