Multiple choice technology programming languages

To start process and run it in background

  1. !
  2. $$

  3. &

  4. +
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Unix shells, appending an ampersand (&) to a command causes it to run in the background, returning control to the shell immediately. The ! operator is for history expansion, $$ gives the current shell's PID, and + is just a character. Only & backgrounds a process.

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