Multiple choice technology operating systems

What will the following command do? echo *

  1. Display all the files under current directory

  2. displcay the pid of the last background job

  3. display the pid of the current background job

  4. display syntax error
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A Correct answer
Explanation

The shell expands the wildcard character * to all non-hidden filenames in the current directory before passing them to the echo command, which displays them separated by spaces. The PID of background jobs is retrieved using $! or jobs, and there is no syntax error.

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