The scope of an environment variable can be?
Local
Global
Both
None
Correct Answer :
C. Both
The scope of an environment variable can be local or global.
Related Questions
What is the full form of AWK?
Active Working Kit
Active Well Kudos
Aho Weinberger Kernighan
Anderson Washington Kernighan
Which of the following command is used to display and manipulate routing tables in the Linux operating system?
routepath
routetable
route
alterroute
Which command is used to create a new group in the Linux operating system?
creategroup
addgroup
groupadd
groupcreate
There are the following statements that are given below which of them are correct about piping in the Linux operating system?
a) The piping the process which is used to redirect the output of one command to another command as an input.
b) We use the pipe (|) operator to perform piping.
c) The piping is not supported in Linux; it works only in the UNIX operating system.
d) None of the above
Options:
Only A
Only B
A and B
A and C
Which of the following command is used to configure a public key at the SSH server for a user?
ssh-copy-id
ssh-public-key
ssh-public-id
ssh-copy-key
Which of the following command is used to perform mathematical expression and print output on the terminal?
expr
exp
calexp
calexpr
Which exact command is used to print lines of the file that are not matching to the specific word?
grep -v
grep -i
grep -k
grep -n
Which of the following is the first process executed by the kernel during the booting time of the system?
crond
init
bootp
none of the above
There are the following statements that are given below, which of them are correct about bang bang command in the Linux operating system?
The bang bang command is used to remove commands history.
The bang bang command is used to remove execute last executed command.
The bang bang command is used to display the last login time of the current user.
None of the above
Which of the following types of encodings are used by the strings command?
a) 16-bit little endian
b) 16-bit big endian
c) 7-bit byte ASCII
d) None of the above
Options:
A and B
B and C
A, B, and C
D
There are the following statements that are given below, which of them are correct about the /var directory in the Linux operating system?
a) This directory contains log files.
b) This directory contains cache files.
c) This directory contains spool files.
d) All the above
Options:
A and B
A and C
B and C
D
Which of the following terminal command is used to send an email?
electronicmail
mailcmd
Which of the following signal is used to PAUSE and STOP the processes?
SIGSTOP
SIGSTP
SIGPAUSE
SIGPS
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)
There are the following statements that are given which of them are correct about Linux commands?
a) In the Linux operating system, a command is an instruction to the system to perform a particular task.
b) Linux commands are case sensitive.
c) All Linux commands are scripts written in python.
d) All of the above
Options:
A and B
A and C
B and C
D
Which exact command is used to kill a running process using process id?
killall
kill -9
kill -p
kill -s
There are the following options that are given below, which of the following security mechanism are used in the Linux operating system?
a) Authentication
b) Authorization
c) Cryptography
d) All the above
Options:
A and B
B and C
A and C
D
Which of the following Linux command is used to configure a wireless network interface in the Linux operating system?
wirelessconfig
wconfiguration
iwconfig
wwconig
There are the following statements that are given below, which of them are the correct about the last command in the Linux system?
a) This command displays the information about the last logged in timing for the user.
b) The last command is used to display the last executed process in the system.
c) This command displays IP address, username, and duration of logging in.
d) The log information is stored in the /var/log/wtmp file.
Options:
A and B
A, B, and C
A, C, and D
A, B, C, 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 symbol is used to represent the group of characters?
/
\
+
-
Which exact command is used to multiply 4 by 2 using expr in the Linux System?
expr 4 * 2
expr 4 /* 2
expr 4 * 2
expr 4 ^* 2
How to check the version of the ls command?
ls -v
ls --v
ls -version
ls --version
Which of the following command is used to switch two characters in vi editor?
sc
xp
xc
xx
There are the following statements that are given below, which of them are correct about /etc/login.defs file in the Linux operating system?
a) In this file, we can define the maximum number of days a password may be used.
b) In this file, we can define the minimum number of days allowed between password changes.
c) In this file, we can also define the minimum and maximum length of the password.
d) There is no /etc/login.defs file exists in the Linux operating system.
Options:
A and B
A and C
A, B and C
D
Which of the following operator is used to comment lines in a shell script file?
//
\
/**/
#
Which command is used to get the path of the current directory?
cdir
dir
pwd
pdir
Which exact command is used to list the files and directories along with hidden files?
ls -l
ls -k
ls -a
ls -n
Which exact command is used to list the files and directories with the size of the file or directory?
ls -l
ls -s
ls -k
ls -h
Which of the following command is used to move to the last line in the file?
G
K
Dot (.)
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