Linux Foundation Certified System Administrator (LFCS) — Question 10

Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)

Answer options

• A. 0
• B. 1
• C. 3
• D. 5
• E. 6

Correct answer: A, E

Explanation

Run level 0 is used for system shutdown, and run level 6 is designated for system reboot, so they should not be set as the default run level because doing so would prevent normal operations. The other options, 1, 3, and 5, are valid run levels for single-user mode and multi-user modes.