Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)
Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)
Run levels 0 and 6 should never be declared as the default run level when using SysV init. Run level 0 is used for shutting down the system, and run level 6 is used for rebooting the system. Setting either of these as the default run level would result in the system either continuously shutting down or rebooting, making it unusable.
Run levels 0 and 6 are typically reserved for specific system states, such as shutdown (0) and reboot (6), and should not be set as the default run level. The other run levels (1, 3, and 5) can be used as default run levels depending on the desired system behavior.