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Linux Foundation LFCS Exam - Topic 4 Question 105 Discussion

Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)
A) 0 and E) 6
B) 1
C) 3
D) 5

Linux Foundation LFCS Exam - Topic 4 Question 105 Discussion

Actual exam question for Linux Foundation's LFCS exam
Question #: 105
Topic #: 4
[All LFCS Questions]

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

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Suggested Answer: A, E

by Kimberlie at Nov 24, 2025, 08:18 PM

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Detra
5 months ago
Yeah, A and E make sense. Safety first!
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Lang
5 months ago
But B can be useful for recovery, right?
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Rasheeda
6 months ago
B is also risky, it's single-user mode.
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Glory
6 months ago
Agreed! A is shutdown, and E is reboot.
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Alverta
6 months ago
I think A and E should never be default.
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Olga
6 months ago
Wow, I didn't know that! Thanks for the heads up!
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Shalon
6 months ago
1 is single-user mode, definitely not default!
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Albina
7 months ago
Wait, are you sure about 1? I thought it was safe.
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Ena
7 months ago
Haha, imagine if your system just rebooted itself every time you logged in. That would be a real party trick!
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Lorrine
7 months ago
A and E? Really? That's like setting your default to power off or reboot. Not very useful!
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Refugia
7 months ago
Hmm, I'm gonna go with B and D. Wouldn't want my system stuck in rescue mode or the graphics runlevel.
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Lawrence
8 months ago
I'd say 1 and 5 are no-go's. Who wants to boot into single-user mode or X11 by default?
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Kina
8 months ago
Definitely not 0 and 6, those are for shutting down and rebooting the system.
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Viva
8 months ago
I’m a bit confused about run levels, but I think 0 and 6 are definitely not safe as defaults because they lead to shutdown or reboot.
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Han
8 months ago
I practiced a similar question last week, and I feel like run levels 0 and 6 are both related to shutdown and reboot, so they shouldn't be defaults.
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Telma
8 months ago
I'm not entirely sure, but I remember something about run level 1 being for single-user mode, which might not be ideal as a default either.
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Arlette
8 months ago
Ugh, I'm drawing a blank on the run levels right now. I'll have to guess and hope for the best.
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Louvenia
9 months ago
I'm feeling pretty confident about this one. I remember learning that certain run levels should never be used as defaults, so I think I can narrow it down.
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Bernardo
9 months ago
Okay, I've got a strategy for this. I'll start by eliminating the run levels that are clearly not appropriate as defaults, then focus on the remaining options.
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Carey
9 months ago
I think run level 0 is definitely one that shouldn't be set as default since it usually means shutdown, right?
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Carla
9 months ago
Totally agree, 0 is shutdown and 6 is reboot!
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Virgie
10 months ago
A) 0 and E) 6 are the ones to avoid.
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Veronique
10 months ago
True, but not for default. A and E are clear choices.
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Roselle
10 months ago
I'm a bit confused by the wording of this question. I'll need to review my notes on SysV init to make sure I understand the run levels properly.
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Rickie
10 months ago
Hmm, this is a tricky one. I'll need to think carefully about the different run levels and their purposes.
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Lisandra
4 months ago
So, A and B are the answers? Sounds good!
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Judy
5 months ago
Right! Not ideal for default either.
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Ty
5 months ago
What about run level 1? That's single-user mode.
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Timothy
5 months ago
Agreed! It's for shutdown.
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Billi
9 months ago
I think run level 0 should definitely not be default.
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