Which of the following special shell variables is used to process number of the last background job?
A. $!
B. $#
C. $0
D. $*
E. None of the above
Answer: Option A
Solution (By Examveda Team)
In Unix shell scripting, the $! special variable is used to process the number of the last background job. It holds the process ID (PID) of the last command run in the background.So, $! is the special shell variable used to process the number of the last background job.
This Question Belongs to Computer Science >> Unix
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