Which of the following operating systems is written in C language?
A. Windows
B. Linux
C. MacOS
D. All of the above
Answer:D
Which of the following operating systems is written in C language?
A. Windows B. Linux C. MacOS D. All of the above
Explanation: Windows, Linux and MacOS are all written in C language, at least partially. C language is widely used for writing operating systems, as it provides low-level access to hardware and memory, as well as high-level abstraction and portability.