Explore topic-wise MCQs in Computer Science Engineering (CSE).

This section includes 713 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science Engineering (CSE) knowledge and support exam preparation. Choose a topic below to get started.

601.

The Unix command used to find out the number of characters in a file is

A. nc
B. wc
C. chcnt
D. c
Answer» C. chcnt
Discussion
602.

Which of the following commands is used for an automatic remainder service?

A. write
B. calender
C. mail
D. mesg
Answer» C. mail
Discussion
603.

The cc command makes a total of

A. 1 pass
B. 2 pass
C. 4 pass
D. 5 pass
Answer» E.
Discussion
604.

Which of the following commands is used to count the total number of lines,words and characters contained in a file?

A. count p
B. wcount
C. wc
D. count w
Answer» D. count w
Discussion
605.

Which command is used to display a file contents in octal form?

A. cd
B. of
C. od
D. oct
Answer» D. oct
Discussion
606.

Which of the following commands is used to rename a file?

A. rename
B. mv
C. remove
D. ren
Answer» C. remove
Discussion
607.

Which command is used with vi editor to delete a single character?

A. z
B. y
C. a
D. x
Answer» E.
Discussion
608.

The tar command in UNIX

A. used to create compressed archives of directories and files
B. used to extract directories and files from an archives
C. both a and b
D. none of the above
Answer» D. none of the above
Discussion
609.

Which command is used to sort the lines of data in a file in reverse order

A. sort
B. sh
C. st
D. sort -r
Answer» E.
Discussion
610.

Which of the following changes permission to deny write permission to group and others?

A. chmod go-w filex
B. chmod go w filex
C. chmod go=w file
D. none of the above
Answer» B. chmod go w filex
Discussion
611.

Which command is used with vi editor to move the cursor to the left?

A. i
B. k
C. j
D. h
Answer» E.
Discussion
612.

Which command is used to create a directory?

A. crdir
B. mkdir
C. md
D. cr
Answer» C. md
Discussion
613.

Which of the following is not a communication command?

A. write
B. mail
C. mesg
D. grep
Answer» E.
Discussion
614.

Which command is used to extract specific columns from the file?

A. cut
B. grep
C. past
D. cat
Answer» B. grep
Discussion
615.

Which command allows you to view your file 24 lines at a time ?

A. more
B. cat
C. pg
D. none of the above
Answer» B. cat
Discussion
616.

Which command is used to display the device name of the terminal you are using?

A. who
B. ls
C. tty
D. stty
Answer» D. stty
Discussion
617.

Which command will be used with vi editor to append text at end of line?

A. a
B. i
C. a
D. l
Answer» B. i
Discussion
618.

Which of the following command the file names in multiple columns?

A. is–x
B. is
C. is–1
D. is–f–x
Answer» C. is–1
Discussion
619.

Which command is used to remove a file ……

A. rename
B. mv
C. rm
D. del
Answer» D. del
Discussion
620.

The tail command in UNIX……

A. can be used to look at the tail or bottom of the file
B. can be used to display the list of last 10 files in the current directory
C. can be used to display the list of last 15 in the current directory
D. none of the above
Answer» B. can be used to display the list of last 10 files in the current directory
Discussion
621.

Which command is used to remove a directory?

A. rd
B. rmdir
C. dldir
D. rdir
Answer» C. dldir
Discussion
622.

The sort command in UNIX ….

A. used to sort a file
B. used to sort the list of files in a directory
C. both a and b
D. none of the above
Answer» B. used to sort the list of files in a directory
Discussion
623.

The command that can be used to restrict incoming messages to a user is………..

A. mesg
B. halt
C. grep
D. sleep
Answer» B. halt
Discussion
624.

Which of the following file names can be found in more than one directory?

A. passwd
B. bin
C. date
D. none of the above
Answer» B. bin
Discussion
625.

Which of the following system calls transforms an executable binary file into a process?

A. fork
B. exec
C. ioct1
D. longjmp
Answer» C. ioct1
Discussion
626.

The child process invoke …….to execute program copy .

A. fork
B. execl
C. wait
D. printf
Answer» C. wait
Discussion
627.

When a process makes a system call ,its mode changes from………

A. user to kernel
B. kernel to user
C. restricted to unrestricted
D. unrestricted to restricted
Answer» B. kernel to user
Discussion
628.

The new process called, child process gets a ………... return value from fork.

A. -1
B. 0
C. 2
D. 1
Answer» C. 2
Discussion
629.

The read system calls return 0 when ………..

A. it reaches middle of file
B. it reaches end of the file
C. file is empty
D. none of these
Answer» C. file is empty
Discussion
630.

File discriptor programs uses………………...

A. to delete file
B. to save file
C. for subsequent references for file
D. none of these
Answer» D. none of these
Discussion
631.

All system calls return ……..if open or create call fails

A. -2
B. 0
C. 1
D. -1
Answer» E.
Discussion
632.

The open and create system calls returns an integer called a ……….

A. file number
B. file discriptor
C. file variable
D. none of these
Answer» C. file variable
Discussion
633.

Permission mode 0666(octal) means…………

A. allowing all users acess to file for writing
B. allowing all users acess to file for reading
C. restrict to read and write
D. allowing all users access to file for reading writing
Answer» E.
Discussion
634.

Permission mode on newly created file will be……

A. 0666(octal)
B. 0666(hexadecimal)
C. 0999(octal)
D. 0798(hex)
Answer» B. 0666(hexadecimal)
Discussion
635.

Unix system treats devices as a ……..

A. hardware
B. file
C. byte
D. none of these
Answer» C. byte
Discussion
636.

The Newly created files are ………….. of the file system directory structure.

A. main nodes
B. root nodes
C. leaf nodes
D. middle nodes
Answer» D. middle nodes
Discussion
637.

Access permission can be set to …………

A. the file owner
B. a file group
C. everyone else
D. all of these
Answer» E.
Discussion
638.

what is use of ls command ?

A. to list names and attribute of files
B. to list size of files
C. to list length of files
D. none of these
Answer» B. to list size of files
Discussion
639.

System treats the data in a directory as a ……………..

A. byte stream
B. bit stream
C. stream
D. none of these
Answer» B. bit stream
Discussion
640.

System accounting program acctcom find ……….

A. variable length record
B. fixed length record
C. no record
D. none of these
Answer» C. no record
Discussion
641.

Text formatting program troff find …………. character at the end of each line

A. newline
B. slash
C. dot
D. none of these
Answer» B. slash
Discussion
642.

Full path name starts with …..

A. dot
B. slash
C. double slash
D. non of these
Answer» C. double slash
Discussion
643.

Directories are …….

A. fixed files
B. regular files
C. variable files
D. none of these
Answer» C. variable files
Discussion
644.

Non leaf node of the file system structure is …………..

A. leaf node of file
B. directory of file
C. regular file
D. path name
Answer» C. regular file
Discussion
645.

How many system calls in system V

A. 32
B. 64
C. 128
D. 16
Answer» C. 128
Discussion
646.

what is a.out ?

A. system user program
B. private user program
C. local program
D. none of these
Answer» C. local program
Discussion
647.

…………responsible for exchanging data between kernel and programs

A. system calls
B. thread
C. process
D. none of these
Answer» B. thread
Discussion
648.

Out of 64 system calls in system V how many are frequently used…

A. 64
B. 32
C. 16
D. 128
Answer» C. 16
Discussion
649.

Program such as Shell and editors interact with kernel by invoking ……….

A. process
B. thread
C. system calls
D. none of these
Answer» D. none of these
Discussion
650.

Operating System is also called as ……….

A. system kernel
B. kernel
C. both a and b
D. none of these
Answer» D. none of these
Discussion