PCA Promql Practice Question
You are joining an instant vector of application versions with an instant vector of metrics using a many-to-one relationship. The application version vector has more labels than the metric vector. Which keyword must be appended to the matching modifier to include labels from the 'many' side?
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
✓
group_left
In many-to-one or one-to-many matches, group_left or group_right must be provided to specify which side supplies additional labels.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
group_left
Why this is correct
Correct. group_left allows labels from the 'many' side to be included in the result.
- ✗
include_labels
Why it's wrong here
include_labels is not a valid PromQL keyword.
- ✗
keep_all
Why it's wrong here
keep_all is not a valid PromQL keyword.
- ✗
group_right
Why it's wrong here
group_right would be used if the 'one' side was on the right and you needed its labels.
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.