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Q: Which of the following was the first operating system written in 'C' language.
  • A. LINUX
  • B. Windows-95
  • C. Xenix
  • D. UNIX
Correct Answer: Option D - 'C' language is the commonly used computer programming language. It was developed by Dennis M. Ritchie at bell telephone laboratories in 1972 with the aim of creating the UNIX operating system. UNIX is the first operating system written in High Level Language (C-language). It is mainly used for web servers.
D. 'C' language is the commonly used computer programming language. It was developed by Dennis M. Ritchie at bell telephone laboratories in 1972 with the aim of creating the UNIX operating system. UNIX is the first operating system written in High Level Language (C-language). It is mainly used for web servers.

Explanations:

'C' language is the commonly used computer programming language. It was developed by Dennis M. Ritchie at bell telephone laboratories in 1972 with the aim of creating the UNIX operating system. UNIX is the first operating system written in High Level Language (C-language). It is mainly used for web servers.