LPIC-1 System Architecture Practice Question
Which THREE of the following are valid runlevels in a traditional SysV init system? (Choose three.)
⚠ Common exam trap
A common misconception is that runlevels can be any number from 0 to 9, but the SysV init standard strictly limits valid runlevels to 0 through 6, with 7–9 being reserved or invalid. The LPI LPIC-1 exam expects you to know the standard runlevels and their purposes.
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
✓
6
In a traditional SysV init system, runlevels are predefined system states numbered from 0 to 6. Runlevel 6 is the standard runlevel for system reboot, where the init process terminates all processes, unmounts filesystems, and restarts the system.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
9
Why it's wrong here
9 is not a standard SysV runlevel.
- ✓
6
Why this is correct
Runlevel 6 is reboot.
- ✗
7
Why it's wrong here
7 is not a standard SysV runlevel; valid runlevels are 0-6.
- ✓
1
Why this is correct
Runlevel 1 is single-user mode.
- ✓
0
Why this is correct
Runlevel 0 is halt.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.