R4RIN – MCQs, Mock Tests | Unix/Lunux Linux Mcqs Questions Set 3

With a umask value of 112, what is the default permission assigned to newly created regular file?

1. —x–x-wx
2. -rw-rw-r–
3. -r-xr-x-r–
4. -rw-rw-r–

✅ Correct Answer: 4

Which command is used to assign read-write permission to the owner?

1. chmod a+r file
2. chmod o+r file
3. chmod u=rw file
4. chmod og-r file

✅ Correct Answer: 3

Given the command chmod o-w datafile

1. sets write permission to everyone for datafile
2. sets write permission to others for datafile
3. clears write permission to everyone for datafile
4. clears write permission to others for datafile

✅ Correct Answer: 4

Which of these commands will set the permissions on file textfile to read and write for the owner, read for the group, and nothing for everyone else?

1. chmod 046 textfile
2. chmod 640 textfile
3. chmod 310 textfile
4. chmod rw r nil textfile

✅ Correct Answer: 2

If you are a root user, how can you grand execute permission only for the owner of the file project1?

1. chmod +x project1
2. chmod u+x project1
3. chmod a+x project1
4. chmod U+X project1

✅ Correct Answer: 2

A user executes the following command successfully: $ chmod +x file1.txt Which of the following is true of the output of this command?

1. The command results in adding execute permission to the user who ran this command
2. The command results in adding execute permission for the owner of the file
3. The command results in an error since the file is not an executable file
4. The command results in adding execute permission for all users (i.e., user,group & others)

✅ Correct Answer: 4

What does chmod +t do?

1. wrong syntax
2. set effective userid for filename
3. set effective groupid for filename
4. set the sticky bit

✅ Correct Answer: 4

Which of the following umask settings doesn’t allow execute permission to be set by default on directory files

1. 222
2. 111
3. 0
4. 444

✅ Correct Answer: 3

Which of the following umask settings allow execute permission to be set by default on regular files

1. 222
2. 111
3. 0
4. None of the mentioned

✅ Correct Answer: 4

The command chmod 4777 a.out

1. will set the suid bit of a.out
2. will set the suid bit of a.out only if the command is issued by root
3. is not a valid command
4. will set the sticky bit of a.out

✅ Correct Answer: 1

Which command is used to check filesystem usage in a system?

1. mount
2. df
3. du
4. dd

✅ Correct Answer: 2

Which among the following allows fast file system recovery?

1. Ext2
2. Journaling
3. Caching
4. Sysfs

✅ Correct Answer: 2

Which filesystem can be used to change certain kernel parameters at runtime using sysctl command?

1. Ext3
2. Sysfs
3. Ext4
4. Procfs

✅ Correct Answer: 4

Filesystem for CDROM is:

1. Ext2
2. Ext3
3. Isofs
4. Procfs

✅ Correct Answer: 3

Which file system has journaling capability?

1. Ext2
2. Ext4
3. Isofs
4. Procfs

✅ Correct Answer: 2

Which file contains the filesystems to be automatically mounted during boot?

1. /etc/mount
2. /etc/fstab
3. /etc/inittab
4. /etc/boot

✅ Correct Answer: 2

__ is a directory (which should exist), on which to mount the file system?

1. Root
2. Boot
3. Mount-point
4. Partition

✅ Correct Answer: 3

Which command is used to mount file system read only.

1. mount –a
2. mount –v
3. mount –f
4. mount –r

✅ Correct Answer: 4

Which command is used to check filesystem usage in a system?

1. mount
2. df
3. du
4. dd

✅ Correct Answer: 2

Filesystem for CDROM is:

1. Ext2
2. Ext3
3. Isofs
4. Procfs

✅ Correct Answer: 3

___ is a directory (which should exist), on which to mount the file system?

1. Root
2. Boot
3. Mount-point
4. Partition

✅ Correct Answer: 3

Which of the following is not a valid run-level

1. s
2. 0
3. 8
4. 1

✅ Correct Answer: 3

On Linux, initrd is a file

1. Containing root file-system required during bootup
2. Contains only scripts to be executed during bootup
3. Contains root-file system and drivers required to be preloaded during bootup
4. None of the mentioned

✅ Correct Answer: 3

Which is loaded into memory when system is booted?

1. Kernel
2. Shell
3. Commands
4. Script

✅ Correct Answer: 1

The process of starting up a computer is known as

1. Boot Loading
2. Boot Record
3. Boot Strapping
4. Booting

✅ Correct Answer: 3

Bootstrapping is also known as

1. Quick boot
2. Cold boot
3. Hot boot
4. Fast boot

✅ Correct Answer: 2

The shell used for Single user mode shell is:

1. bash
2. Csh
3. ksh
4. sh

✅ Correct Answer: 4

Single user mode shell runs as

1. Admin user
2. Root user
3. Normal user
4. Log user

✅ Correct Answer: 2

Which is the only partition mounted in Single user mode

1. boot
2. usr
3. root
4. tmp

✅ Correct Answer: 3

Which daemon manages the physical memory by moving process from physical memory to swap space when more physical memory is needed.

1. Sched daemon
2. Swap daemon
3. Init daemon
4. Process daemon

✅ Correct Answer: 2

At the end of kernel bootstrap, which process is started?

1. /etc/init
2. /etc/sched
3. /etc/swap
4. /etc/kernel

✅ Correct Answer: 1

The process id of init process is:

1. -1
2. 0
3. 1
4. 2

✅ Correct Answer: 3

Which file is read by init to get the default runlevel

1. /etc/profile
2. /etc/init
3. /etc/boot
4. /etc/inittab

✅ Correct Answer: 4

If a program executing in background attempts to read from STDIN

1. It is terminated
2. Its execution is suspended
3. STDIN is made available to it
4. None of the mentioned

✅ Correct Answer: 2

Which command is used to bring the background process to forground?

1. bg
2. fg
3. background
4. forground

✅ Correct Answer: 2

How to run a process in the background?

1. &
2. *
3. ?
4. |

✅ Correct Answer: 1

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)

1. su
2. root
3. chroot
4. user

✅ Correct Answer: 1

Process information in the current shell can be obtained by using

1. kill
2. bg
3. fg
4. ps

✅ Correct Answer: 4

Which signal is sent by the command kill -9 ?

1. INT
2. TERM
3. KILL
4. STOP

✅ Correct Answer: 3

Which of the following values for STAT column of ps command is not true:

1. status R means running
2. Status S means sleeping
3. Status E means exited
4. Status Z means zombie

✅ Correct Answer: 3

When a child process exits before the parent process exits, which of the following is true:

1. the child process becomes defunct
2. the parent process becomes defunct
3. if the parent process does not handle SIGCHLD, the child process becomes a zombie
4. none of the mentioned

✅ Correct Answer: 3

The signal sent to a process when the Ctrl-C key is pressed is

1. KILL
2. TSTP
3. TERM
4. INT

✅ Correct Answer: 4

we can change the priority of a running process using

1. nice
2. renice
3. priority cannot be changed for a running process
4. only superuser can change the priority

✅ Correct Answer: 2

nohup is used to

1. automatically hang up the process after logout
2. continue the process after logout
3. create backgroung process
4. manually hang up the process after logout

✅ Correct Answer: 2

Users Primary Group id is listed in which file, at the time of creation of the user (On a standard Unix system)

1. /etc/passwd
2. /etc/groups
3. /etc/login
4. /etc/profile

✅ Correct Answer: 1

The encrypted password of a user is stored in

1. /etc/shadow
2. /etc/enpasswwd
3. /etc/.passwd
4. /etc/passwd

✅ Correct Answer: 1

A user can change the default log-in shell using

1. chmod
2. chsh
3. rmsh
4. tchsh

✅ Correct Answer: 2