PCA Instrumentation And Exporters Practice Question
When implementing a custom exporter, what format must the output follow to be correctly scraped by Prometheus?
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
✓
Prometheus Text Format
Prometheus requires a text-based format where each metric is represented by lines, including name, labels, and values.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
JSON
Why it's wrong here
Prometheus does not natively scrape JSON endpoints without a bridge.
- ✗
XML
Why it's wrong here
XML is not a native format for Prometheus.
- ✓
Prometheus Text Format
Why this is correct
The Prometheus text exposition format is the standard for custom exporters.
- ✗
Binary Protobuf
Why it's wrong here
While internal, the standard scraping protocol uses text-based exposition.
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.