PCA Observability Concepts Practice Question
Which TWO are common causes of high-cardinality in Kubernetes environments?
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
✓
Using a unique transaction ID as a label.
Using pod names or unique request IDs as labels creates high cardinality.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using a deployment name label.
Why it's wrong here
Deployments are stable.
- ✓
Using a unique transaction ID as a label.
Why this is correct
These are infinite in number.
- ✓
Using the pod name in a metric label.
Why this is correct
Pod names are unique and ephemeral.
- ✗
Using a cluster region label.
Why it's wrong here
Regions are stable.
- ✗
Using a service name label.
Why it's wrong here
Service names are stable.
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.