Which of the following special shell variables is used to process number of the last background job?
Answer: Option A
No answer description available for this question.
|Dharmajit said: (Sep 21, 2014)|
|$0 The filename of the current script.
$n These variables correspond to the arguments with which a script was invoked. Here n is a positive decimal number corresponding to the position of an argument (the first argument is $1, the second argument is $2, and so on).
$# The number of arguments supplied to a script.
$* All the arguments are double quoted. If a script receives two arguments, $* is equivalent to $1 $2.
$@ All the arguments are individually double quoted. If a script receives two arguments, $@ is equivalent to $1 $2.
$? The exit status of the last command executed.
$$ The process number of the current shell. For shell scripts, this is the process ID under which they are executing.
$! The process number of the last background command.
|Sruthi said: (Dec 14, 2015)|
|I think $0 displays current shell.|
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