PCA Prometheus Fundamentals Practice Question
Which THREE of the following are valid Prometheus TSDB file types?
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
✓
chunks
The TSDB architecture includes chunks, index, and WAL files.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
chunks
Why this is correct
Stores compressed time series data.
- ✗
sql
Why it's wrong here
Not used in Prometheus.
- ✓
index
Why this is correct
Stores label indices for querying.
- ✗
json
Why it's wrong here
Not a TSDB file type.
- ✓
wal
Why this is correct
Write-ahead log for durability.
About these practice questions
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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.