Question:
Which of the following run levels runs the system at single user mode?
A. 2
B. 3
C. 1
D. 0
Explanation:
Runlevels define what tasks can be accomplished in the current state (or runlevel) of a Linux system. Every linux system supports three basic runlevels, plus one or more runlevels for normal operation.
Linux Basic Runlevels
Level # Purpose
0 # Shut down or half the system
1 # Single-user mode, usually aliased as s or S
6 # Reboot the system
Other common linux runlevels (usage differs among distributions)
Level # Purpose
2 # Multiuser mode without networking
3 # Multiuser mode with networking
5 # Multiuser mode with networking and the X Window System
Answer: C