41⟩ Which command is used to mount file system read only? a) mount -a b) mount -v c) mount -f d) mount -r
d) mount -r
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99 Linux Operating System Management Questions And Answers
42⟩ Which of the following time stamps need not exist for a file on traditional unix file system a) Access Time b) Modification Time c) Creation Time d) Change Time
c) Creation Time
43⟩ Which command is used to set limits on file size a) fsize b) flimit c) ulimit d) usize
c) ulimit
44⟩ Which filesystem can be used to change certain kernel parameters at runtime using sysctl command? a) Ext3 b) Sysfs c) Ext4 d) Procfs
d) Procfs
45⟩ We can change the priority of a running process using (a) nice (b) renice (c) priority cannot be changed for a running process (d) only superuser can change the priority
(b) renice
46⟩ The signal sent to a process when the Ctrl-C key is pressed is a) KILL b) TSTP c) TERM d) INT
d) INT
47⟩ Which of the following values for STAT column of ps command is not true a) status R means running b) Status S means sleeping c) Status E means exited d) Status Z means zombie
c) Status E means exited
48⟩ Which file system has journaling capability? a) Ext2 b) Ext4 c) Isofs d) Procfs
b) Ext4
49⟩ ____ is a directory (which should exist), on which to mount the file system? a) Root b) Boot c) Mount-point d) Partition
c) Mount-point
50⟩ A user issues the following command sequence $ a.out & $ bash $ a.out & If the user kills the bash process, then which of the following is true? a) The second a.out process is also terminated b) The second a.out process becomes a defunct process c) The first a.out process becomes a zombie process d) init process becomes parent of second a.out process
d) init process becomes parent of second a.out process
51⟩ When a child process exits before the parent process exits, which of the following is true a) the child process becomes defunct b) the parent process becomes defunct c) if the parent process does not handle SIGCHLD, the child process becomes a zombie d) none of the above
b) the parent process becomes defunct
52⟩ Which signal is sent by the command "kill -9 "? a) INT b) TERM c) KILL d) STOP
c) KILL
53⟩ User's Primary Group id is listed in which file, at the time of creation of the user (On a standard Unix system) a) /etc/passwd b) /etc/groups c) /etc/login d) /etc/profile
a) /etc/passwd
54⟩ A user can change the default log-in shell using a) chmod b) chsh c) rmsh d) tchsh
b) chsh
55⟩ Process information in the current shell can be obtained by using a) kill b) bg c) fg d) ps
d) ps
56⟩ If a program executing in background attempts to read from STDIN a) It is terminated b) It's execution is suspended c) STDIN is made available to it d) None of the mentioned
b) It's execution is suspended
57⟩ Which of the following identifiers associated with a process decide its privilege level a) uid b) suid c) euid d) gid
c) euid
58⟩ How to run a process in the background? a) & b) * c) ? d) |
a) &
59⟩ User id 0 is a) An invalid user id b) The id of the root user c) The id of a user when the user's account is deleted d) None of the above
b) The id of the root user
60⟩ The /etc/passwd file doesn't contain a) userid b) home directory for a user c) login shell name d) None of the above
d) None of the above
