laboursonline – MCQs, Mock Tests | Unix/Lunux Linux Mcqs Questions Set 14

Which system call is used to create Sys V message Queue.

1. msgget
2. shemget
3. semget
4. msgctl

✅ Correct Answer: 1

Which is not the correct option for removing a message queue

1. ipcrm -Q
2. ipcrm -q
3. ipcrm -m
4. none of the mentioned

✅ Correct Answer: 3

Message queues are created in

1. userspace
2. kernelspace
3. userspace & kernelspace
4. none of the mentioned

✅ Correct Answer: 2

Command used to check shared memory is

1. ipcs
2. ipcs -m
3. ipcs -s
4. ipcs -q

✅ Correct Answer: 2

Which is Fastest IPC?

1. Message Queue
2. shared memory
3. Socket
4. All of the mentioned

✅ Correct Answer: 2

What is the persistancy level of Shared memory segments?

1. signal
2. process
3. file system
4. kernel

✅ Correct Answer: 4

The structure which keeps the information about shared memory in the kernel is

1. struct ipc_perm
2. struct semid_ds
3. struct shmid_ds
4. struct msgid_ds

✅ Correct Answer: 3

One process requires M resource to complete a job. What should be the minimum number of resources available for N processes so that at least one process can continue to execute without blocking/waiting?

1. M * N
2. M * N – 1
3. M * N + 1
4. M

✅ Correct Answer: 4

Semaphore P( ) operation usually does the following:

1. descrements the semaphore count and the process sleeps if needed
2. increments the semaphore count
3. wakes up a sleeping process
4. none of the mentioned

✅ Correct Answer: 1

Which call to use to set the resource count of semaphore?

1. semget( )
2. semctl( )
3. sem_setcount( )
4. sem_set_count( )

✅ Correct Answer: 4

Race condition can be avoided by using

1. semaphore
2. mutex
3. socket
4. both semaphore & mutex

✅ Correct Answer: 4

A server which is handling one client at a time is called as

1. single server
2. multiserver
3. concurrent server
4. iterative server

✅ Correct Answer: 4

A server which is handling many clients at a time is called as

1. single server
2. multiserver
3. concurrent server
4. iterative server

✅ Correct Answer: 3

A communication end-point is identified by

1. ip address
2. port number
3. both IP address and port number
4. none of the mentioned

✅ Correct Answer: 3

UNIX/Linux kernel is?

1. Monolithic
2. Micro
3. Exo
4. Nano

✅ Correct Answer: 1

Monolithic kernel

1. is highly extensiblity
2. has less run time overhead
3. smaller than micro level
4. suitable for real time system

✅ Correct Answer: 2

Runlevel system command is used for?

1. getting the present and previous runlevel of the system
2. setting the runlevel attribute of the system in the inittab file
3. can be used to restart or reboot the system
4. all of the mentioned

✅ Correct Answer: 4

Pick the run level to run Linux in multi user mode with networking?

1. 0
2. 3
3. 5
4. 6

✅ Correct Answer: 2

Section 2 of manpage describes

1. Commands
2. System calls
3. Function calls
4. Drivers

✅ Correct Answer: 2

System call can be implemented using which assembly instruction(s) on x86 processors?

1. int 0×80
2. sysenter
3. both int 0×80 & sysenter
4. None

✅ Correct Answer: 3

Which of the following exec call is a system call?

1. execl
2. execlp
3. execve
4. execvp

✅ Correct Answer: 3

x86 architecture uses big endian or little endian addressing mechanism?

1. little-endian
2. endian
3. big-endian
4. none of the mentioned

✅ Correct Answer: 1

__________ timer is decremented only when the process is executing

1. ITIMER_REAL
2. ITIMER_VIRTUAL
3. ITIMER_PROF
4. None of the mentioned

✅ Correct Answer: 2

Daemon process is a?

1. group leader
2. ession leader
3. orphan process
4. all of the mentioned

✅ Correct Answer: 4

he terminal used by a Daemon process is:

1. any terminal
2. no terminal
3. root terminal
4. system console

✅ Correct Answer: 2

Sysconf(_SC_PAGE_SIZE) returns?

1. size of the page
2. max size of the page
3. min size of the page
4. paging allowed or not

✅ Correct Answer: 1

Which has excellent support for older hardware?

1. Unix
2. Linux
3. Minix
4. Xenix

✅ Correct Answer: 2

What is the other name of new shell?

1. Baby shell
2. Junior shell
3. Child shell
4. Assistant shell

✅ Correct Answer: 3

In Linux hard disk partition, hda2, a stands for the __

1. first hard drive
2. first partition
3. second partition
4. second hard drive

✅ Correct Answer: 1

Where do the users arrive after entering exit in Linux system?

1. Login screen
2. Internet
3. Logout screen
4. Login prompt

✅ Correct Answer: 4

Single dot (.) with cd refers to ___

1. Change directory
2. Created directory
3. Current directory
4. Parent directory

✅ Correct Answer: 3

Which command is called as the end-of-file command?

1. Ctrl+ V
2. Ctrl+ B
3. Ctrl+ D
4. Ctrl+ C

✅ Correct Answer: 3

Which of the following is called as the piping symbol?

1. _
2. |
3. ~
4. !

✅ Correct Answer: 2

What was the first version of Linux?

1. 1.0
2. 0.11
3. 1.01
4. 0.1

✅ Correct Answer: 2

What should be the minimum length of a password?

1. 5
2. 6
3. 7
4. 8

✅ Correct Answer: 2

Who can change the password of any user?

1. Everyone
2. SA
3. Supervisor
4. End-user

✅ Correct Answer: 2

Collection of files is called as a

1. Directory
2. Root
3. Field
4. Home

✅ Correct Answer: 1

How much of memory space is occupied by Linux?

1. 4 MB
2. 6 MB
3. 8 MB
4. 12 MB

✅ Correct Answer: 1

The file name can be up to ___ character.

1. 253
2. 254
3. 255
4. 256

✅ Correct Answer: 4

The prompt of the root user is

1. @
2. #
3. %
4. $

✅ Correct Answer: 2

Linux default shell is

1. BAH shell
2. SH shell
3. ASH shell
4. BASH shell

✅ Correct Answer: 1

Who are placeholders to store values?

1. Constants
2. Variables
3. OS
4. Shell

✅ Correct Answer: 2

What type of editing is possible by Ed editor?

1. One command
2. One file
3. One line
4. One page

✅ Correct Answer: 3

___ command clears the screen.

1. Clear
2. Cls
3. Clear all
4. Clean screen

✅ Correct Answer: 1

Which of the following is called as the redirection operator for output?

1. =
2. <<
3. <
4. >

✅ Correct Answer: 4

The complete path name of a file or directory is

1. Root name
2. Tree name
3. Relative path name
4. Absolute path name

✅ Correct Answer: 4

For what based of PC’s, Linux was specifically designed?

1. Intel
2. HCL
3. Wipro
4. IBM

✅ Correct Answer: 1

From where did the file system can be used to unambiguously identified and referenced?

1. Tree structure
2. Folders
3. Home directory
4. Root directory

✅ Correct Answer: 1

Which feature is used to prevent overwriting an existing file the redirection operation?

1. Mkfs
2. Man
3. Cat
4. Noclobber

✅ Correct Answer: 4

When we want replace a file system we have to ____ the present file system.

1. Cancel
2. Remove
3. Unmount
4. Mount

✅ Correct Answer: 3