PCA Observability Concepts Practice Question
Which golden signal would you monitor to detect if a specific API endpoint is returning 404s?
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
✓
Errors
The 'Errors' signal tracks the rate of failed requests, including HTTP 4xx and 5xx codes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Traffic
Why it's wrong here
This measures volume.
- ✗
Saturation
Why it's wrong here
This measures capacity usage.
- ✓
Errors
Why this is correct
Error rates are the primary source for identifying 4xx/5xx issues.
- ✗
Latency
Why it's wrong here
This measures speed.
About these practice questions
Courseiva writes every PCA question from scratch — 304 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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.