Subject :ICSO Class : Class 6
Ans 2:
Class : Class 10
UNIX is a Character User Interface or Command-line User Interface (CUI) based OS.
Ans 5:
Class : Class 7
Unix (/ˈjuː.nɪks/; labeled as UNIX) is a family of multitasking, multiuser PC operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs research station by Ken Thompson, Dennis Ritchie, and others.