PCA Instrumentation And Exporters Practice Question
You are monitoring server hardware metrics using node_exporter. You observe that the metrics are not showing up in Prometheus. Which initial troubleshooting step is most effective?
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
✓
Verify node_exporter is listening on the expected port and accessible.
The node_exporter must be running and listening on the expected port (9100 by default) for the Prometheus server to scrape it. Verifying the port ensures the endpoint is reachable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Verify node_exporter is listening on the expected port and accessible.
Why this is correct
Connectivity to the exporter endpoint is the first requirement for successful scraping.
- ✗
Increase the scrape interval in the Prometheus configuration.
Why it's wrong here
The scrape interval does not affect connectivity, only the frequency of data collection.
- ✗
Disable all collectors in node_exporter to reduce overhead.
Why it's wrong here
Disabling collectors would result in missing metrics, not connectivity.
- ✗
Check if the Prometheus server is running in high availability mode.
Why it's wrong here
Prometheus HA status does not affect the target's ability to expose metrics.
About these practice questions
One of 304 original PCA 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 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.