JNCIA-DevOps Data Serialization Practice Question
Which symbol represents the beginning of a single YAML document stream?
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
✓
Three dashes (---)
YAML documents can optionally begin with a document start marker consisting of three dashes (---).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Three hashes (###)
Why it's wrong here
Incorrect. Three hashes are not standard YAML document markers.
- ✗
Three slashes (///)
Why it's wrong here
Incorrect. Three slashes have no special meaning in YAML.
- ✓
Three dashes (---)
Why this is correct
Correct. Three dashes indicate the start of a YAML document.
- ✗
Three dots (...)
Why it's wrong here
Incorrect. Three dots represent the end of a YAML document.
About these practice questions
One of 307 original JNCIA-DevOps 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 Juniper Networks exam blueprint
This JNCIA-DevOps practice question is part of Courseiva's free Juniper Networks 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 JNCIA-DevOps exam.