Which of the following symbol is used to match exactly one character?
$
?
_
+
Correct Answer :
B. ?
The question mark (?) is used to match exactly one character.
Related Questions
Which of the following statements are the correct about XXXsed command?
a) The sed command is used to display modified data on the console screen, actual data in the file remain the same.
b) The sed command is used to modify the data of a file permanently.
c) The regular expressions are used to display modified data of a file in the sed command.
d) The sed command does not use regular expressions.
Options:
A and C
A and D
B and C
B and D
Which exact command is used, when we want to search words in the file that can be ABC1, ABC5, and ABC8?
grep ABC[0-9]
grep ABC(0-9)
grep ABC(0-9)
grep ABC(0-9)
Which of the following information can be displayed using the netstat command?
a) Information about programs related to open socket.
b) Information about routing tables.
c) Statistics about all ports
d) All of the above
Options:
A and B
B and C
A and C
D
How can we see the compression ratio of a file?
Using -c option of gzip command
Using -r option of gzip command
Using -l option of gzip command
Using -cr option of gzip command
Which file contains encrypted user's passwords?
/etc/passwords
/etc/shadow
/etc/pwd
/etc/pwds
There are the following statements that are given below which of them are correct about the ss command in the Linux operating system?
a) The ss command is the replacement for the netstat command.
b) It is faster than the netstat command.
c) We can display all UDP and TCP socket connections using ss command.
d) The ss can display all TCP socket connections only.
Options:
A and B
A and C
A, B, and C
A, B, and D
Which of the following command is used to save and quit from the vi editor?
:q
:Q
:wq
:q!
Which of the following command is known as bang bang in the Linux operating system?
##
,
!!
@@
There are the following statements are given below, which of them are the correct about the ps command in the Linux system?
a) This command is used to display information about processes running in the system.
b) This command displays the memory occupied by a system call.
c) This command displays the process id of the running processes.
d) This command displays the name of the running processes.
Options:
A and B
A, B, and C
A, C, and D
A, B, C, and D
Which of the following Linux distribution does not follow the File Hierarchy System?
a) Ubuntu
b) GoboLinux
c) NixOS
d) Redhat
Options:
A and B
A and C
B and C
B and D
In which year vi editor was developed?
1976
1980
1982
1988
Which of the following option is used to mention delimiter in the cut command?
-del
-d
-delmiter
-delm
Which of the following command is used to replace the current character in the vi editor?
R
rr
r
rc
Which of the following are non-standard directories?
a) /lost+found
b) /var
c) /run
d) /cdrom
Options:
A and B
A and C
A, C, and D
A, B, C, and D
Which command is used to create multiple directories in a single command?
md
mkdir
makedir
mkdirs
Which of the following directory contains interrupts related files?
/proc
/dev
/var
/home
There are the following statements that are given below, which of them are correct about Globbing?
a) The Globbing is used to recognize the wildcard characters and then expand them into path-name.
b) The Globbing is also known as path-name expansion.
c) The File Globbing is not supported by the Linux operating system.
d) All the above
Options:
A and B
A and C
A, B, and C
D
Which of the following command is used to display the path of a command in the Linux File System?
pcmd
which
pathcmd
None of the above
Which of the following command is used to move up in the vi editor?
I
h
j
k
Which of the following command is used to rename the file names that contain text with txt in the current directory?
rename 'r/txt/text' *
rename 'e/text/txt' *
rename 's/txt/text' *
rename 's/text/txt' *
Which of the following type of permissions are used for files and directories in the Linux Operating System?
a) Read
b) Write
c) Execute
d) All of the above
Options:
A and B
B and C
A and C
D
Which of the following Linux command is used to set values in environment variables?
setval
setenv
export
env
Which of the following command is used to print the number of lines that exist in the specified file?
awk 'END { print NL }'
awk 'END { print N }'
awk 'END { print NR }'
awk 'END { print NN }'
Which of the following operator is used to store the exit code of a previous command?
$?
%$
?&
?@
There are the following statements that are given below, which of them are correct system libraries in Linux operating system?
a) System libraries are a special program.
b) We can use kernel functionalities using system libraries.
c) System libraries are user programs.
d) System libraries used system calls.
Options:
A and B
B and C
A, B, and D
A, B, and C
Which of the following are correct types of shells used in the Linux operating system?
a) Bourne shell
b) Korn shell
c) Bourne Again shell
d) POSIX shell
Options:
A and B
B and C
A, B, and C
A, B, C, and D
Which of the following command is used to switch two characters in vi editor?
sc
xp
xc
xx
Which of the following command is used to search the file(s) within the specified directory?
search
find
fileseach
fsearch
What is the full form of OFS in AWK?
Object Field Separator
Obsolete Field Separator
Officiated Field Separator
Output Field Separator
Which exact command is used to assign all read, write and execute permission to all owners of a file?
chmod 7
chmod 777
chown 777
chgrp 777