Multiple choice technology operating systems

Which of the following commands is not a filter?

  1. man

  2. cat

  3. head

  4. pg
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A filter is a command that reads from standard input, processes the data, and writes to standard output. Cat (concatenate), head (show first lines), and pg (page display) are all filters - they read input and produce output. 'man' is the manual viewer - it doesn't read from stdin, process data, or write to stdout as a filter would. It's a documentation system that displays manual pages, not a data processing tool.

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