Multiple choice

Which of the following is not a UNIX or Linux variant?

  1. SunOS

  2. RedHat

  3. DOS

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

SunOS (Solaris), RedHat Linux, and Debian Linux are all UNIX or UNIX-like operating systems. DOS (Disk Operating System) is a separate operating system family developed by Microsoft, with no UNIX heritage. DOS and Windows are entirely different from UNIX/Linux.

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