I tried:
who & pwd and it output the result of pwd output: /root.
May I know if I am right?
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There's no motivation for this question (and no question in the Question body); why do you need the output of two commands with one command? You fake it by writing a script that executes those two commands, then call the "one" script, but this sounds like it's a homework assignment to teach you about command-lines. Perhaps you could lay out what you've learned and why you think that we're the right people to tell you if your homework is correct. – Jeff Schaller♦ Nov 15 '18 at 15:03
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The & operator has nothing to do with executing two commands, see this question.
In order to execute two distinct commands on the same line, use the appropriate separator ;:
who; pwd
