1⟩ Which file contains the filesystems to be automatically mounted during boot? a) /etc/mount b) /etc/fstab c) /etc/inittab d) /etc/boot
b) /etc/fstab
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99 Linux Operating System Management Questions And Answers
2⟩ Nohup is used to a) automatically hang up the process after logout b) continue the process after logout c) create backgroung process d) manually hang up the process after logout
b) continue the process after logout
3⟩ Which command can be executed by a user who is already logged into the system, in order to change to the root user? (type the command without any parameters) a) su b) root c) chroot d) user
a) su
4⟩ Which command is used to bring the background process to forground? a) bg b) fg c) background d) forground
b) fg
5⟩ The encrypted password of a user is stored in a) /etc/shadow b) /etc/enpasswwd c) /etc/.passwd d) /etc/passwd
a) /etc/shadow
6⟩ What does the following command do? who | wc -l a) List the number of users logged in b) List the users c) List the number of users in the system d) Display the content of who command
a) List the number of users logged in
7⟩ Which of the following files need to be referred for user's secondary group? a) /etc/passwd b) /etc/shadow c) /etc/group d) /etc/profile
c) /etc/group
8⟩ Return value of fork() system call can be a) -1,<0,0 b) -1,>0,0
b) -1,>0,0
9⟩ Which niceness value among the following indicate most favorable scheduling? a) 0 b) 19 c) 5 d) -20
d) -20
10⟩ Fork returns _____ to parent process on success a) 0 b) child process id c) parent process id d) none
b) child process id
11⟩ On x86-32 Linux, at which address the code segment of the program starts? a) 0×00000000 b) 0×08048000 c) 0×80000000 d) 0xbfff0000
b) 0×08048000
12⟩ A system has 512MB of physical memory. Which among the following is not a suitable virtual memory size for this system architecture? a) 512MB b) 256M c) 4GB d) None of the above
d) None of the above
13⟩ LRU stands for a) Last received Unit b) Least recently Used c) Least recently usable d) Lost Recoverd unit
b) Least recently Used
14⟩ Among these files which has an ELF format a) shared objects b) core c) executables d) all of the above
d) all of the above
15⟩ Any file's attribute information is stored in which structure on the disk a) Inode b) Data blocks c) File blocks d) Directory file
a) Inode
16⟩ What is the default number of files open per user process? a) 0 b) 1 c) 2 d) 3
d) 3
17⟩ What is the use of fcntl function? a) locking a file b) reading the file descriptor flag c) changing the file status flag d) all the above
d) all the above
18⟩ The file system information is stored in a) Boot block b) Super Block c) Inode Table d) Data Block
b) Super Block
19⟩ read() system call on success returns a) 0 b) -1 c) number of character d) none
c) number of character
20⟩ namei() is a) ANSI C library function b) C library function c) System call d) kernel routine
d) kernel routine
