A) Single-user multitask are also known as NOS
B) Windows OS are the most commonly used single- used multitask operating systems.
C) Single-user OS are commonly used in robotics
D) Supercomputers use single user multitask OS.
E) OS is not a must for a computer.
Correct Answer: B
Solution :
[b] The Microsoft Windows operating systems and the Macintosh operating system are the most commonly used single-user multi-task operating systems (Informatics: Technology In Action by Evans). Single-user multitasking operating systems allow a single user on a single computer to perform more than one task at a time.
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