Advanced Bash Shell Scripting (Linux) Quiz Questions and Answers
Explanation :
’!cat’ will reexecute the last cat command, ‘!3’ will reexecute the third last command and ‘!$’ will execute the last argument of previous command.
Explanation :
env is an external command which runs in a child process and it lists only environment variables which are inherited from its parent, the shell.
Explanation :
’fc -l’ is used to list history of commands and ‘fc -e’ to edit them and ‘history’ command also provides the histroy of commands.
Answer :
- set -A array_name value1 value2 ... Valuen
Explanation :
If you are using the ksh shell, here is the syntax of array initialization : set -A array_name value1 value2 ... valuen.
Answer :
- A) numbers
B) letters
C) underscore
All of the above
Explanation :
The name of a variable can contain only letters (a to z or A to Z), numbers ( 0 to 9) or the underscore character ( _).
Explanation :
Unsetting or deleting a variable directs the shell to remove the variable from the list of variables that it tracks.
Answer :
- array_name=(value1 ... valuen)
Explanation :
If you are using the bash shell, here is the syntax of array initialization : array_name=(value1 ... valuen)
Explanation :
A shell variable is capable enough to hold a single value. These variables are called scalar variables.
Answer :
- stops the process running in the shell
Explanation :
Ctrl-Z key combination generates a SIGTSTP signal and stops the process running in the shell.
Explanation :
After you have set any array variable, you access it as follows : ${array_name[index]}
