40 most important mcq Question for Unix operating system online mcq tests. These Unix mcq also helpful in cracking the interviews and can be asked in various IT companies like tcs xplore program and other also. Studying these questions will surely help you to get good grades.
Q. 1. Which vi command should one use to delete the first 10 lines of a file in Normal mode?
gg10dd
10ggdd
10dw
10ddl
gg10dd
Q. 2. Which vi command should one use to quit vi without saving any changes made?
:q
:q!
:quit
u
:q!
Q. 3. When in Normal mode of vi, which command would you use to search for a word in a file?
s
/
i
Esc
/
Q. 4. / command is used to search text in the ______ in Vi editor
forward direction
backward direction
any direction
reversed direction
forward direction
Q. 5. If I want auto indentation to be turned on every time I launch vi, then which file would I have to edit?
.vimrc
.indent
.bashrc
.viminfo
.vimrc
Q. 6. Which file is used to store configuration settings of Vi editor
.vimrc
.indent
.bashrc
.viminfo
.vimrc
Q. 7. Which of these is not a vi feature?
autosave
autoindent
autoread
autoclose
autoclose
Q. 8. Which vi command should one use to delete 5 characters starting from the current position of the cursor?
5x
xxxx
dd
5dd
5x
Q. 9. Which of the following is not a file attribute in Unix?
file location
file size
creation time
file owner
file location
Q. 10. What does the first character in the output of command “ls -l” represent?
Owner Read access
File Permission
File Type
None of the options
File Type
Q. 11. Which unix command is used to find out the total size of a partition on disk?
du
df
ls
cat
df
Q. 12. Which command can I use to find out the mount points of a partition of my disk?
man
du
ls
df
df
Q. 13. Which of the following is not a mode for tar
list
create
compress
extract
compress
Q. 14. Which directory in UNIX usually stores the configuration files?
/bin
/conf
/etc
/home
/etc
Q. 15. Which option of ls sorts the files according to their size?
ls -s
ls -S
ls -t
ls -h
ls -S
Q. 16. Which command would you use to replicate a complete directory structure from one location to another?
mv -r
cp
mv
cp -r
cp -r
Q. 17. Which of the following Unix command is used to create an empty file?
ls
touch
chown
du
touch
Q. 18. The first character in the output of a ls -l command for a file is “c” represent?
It is a copied file
It is a created file
It is a character file
It is a class file
It is a character file
Q. 19. Which command can I use to modify the timestamp of a file?
touch
chmod
chtime
chown
touch
Q. 20. Which of the following commands cannot be used to view the contents of a file?
ls
cat
vi
emacs
ls
Q. 21. Which of the following commands is used to list the contents of a directory ?
ls
listdir
mkdir
v
dirls
ls
Q. 22. Which command can I used to change the owner and also the group of a file?
chgrp
chown
chmod
umask
chown
Q. 23. Which command is used to delete an empty directory?
deldir
del
rm
rmdir
rmdir
Q. 24. Which file attribute is not stored in an inode?
file size
file name
file permissions
file owner
file name
Q. 25. Which of the following is represented as a file on UNIX
directory
All of these
Feedback:
printer
Shell script
All of these
Q. 26. Which of these is an invalid argument to cd command
Absolute file path
–
Directory
../../../
Absolute file path
Q. 27. cd command only accepts _____ as arguments
path
repository
Directories
file
directories
Q. 28. Which command is used to set the default permissions of a newly created file on UNIX?
.bashrc
chown
chmod
umask
umask
Q. 29. Which UNIX command is used to convert a file to a read only file
readonly
chown
chmod
vi
chmod
Q. 30. ___ used to change the permissions of a file on UNIX
chrun
chown
chmod
vi
chmod
Q. 31. Which command need to give write permissions to a file feedback.txt to all the users belong to particular group ?
chmod a+w feedback.txt
chmod g+w feedback.txt
chmod u+w feedback.txt
chmod u+gw feedback.txt
chmod g+w feedback.txt
Q. 32. What is the octal representation of the file owner’s mode : rw-
5
6
42
420
6
Q. 33. Read permissions is represented in octal system as
2
6
4
420
4
Q. 34. write permission is represented as _____ in octal system
5
6
2
4
2
Q. 35. What is the default file permissions for a system with umask : 471
206
undefined
376
306
306
Q. 36. Which is the best place to install your program executable files?
bin directory
lib directory
etc directory
tmp directory
bin directory
Q. 37. What is the main purpose of an Operating System?
Connect me to internet
Install software
Interact with the user
Manage all system resources
Manage all system resources
Q. 38. UNIX provides multi-tasking by
Parallel processing
Time sharing
multiple processors
multi users
Time sharing
Q. 39. What is the architecture model of UNIX operating system
Modular
Monolithic
Heuristic
Simple
Modular
Q. 40. Which of these is not a feature of UNIX
Consistency
Security
Simplicity
Multi-user
Consistency, Simplicity
Q. 41. Which of the following are variants of UNIX?
System V
BSD
both of the above
Fedora
Ubuntu
both of the above
Q. 42. Which subsystem of UNIX kernel makes hardware usable?
Process Management
Virtual File System
Memory Management
Device Drivers
Device Drivers
Q. 43. _____ vi command moves the cursor to the first line of the file.
dd
first
1dd
gg
gg
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