NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 25

Which is NOT an Operating System? A. OS X B. Windows 7 C. DOS D. C++

  1. D

  2. B

  3. C

  4. A

Show answer & explanation

Answer: (A) D

Explanation

OS X (macOS), Windows 7 and DOS are operating systems: they manage the computer's hardware and run programs. C++ is a programming language used to write software, not an operating system.