Operating System (OS)
What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers?

MS DOS
UNIX
OS/2
None of these
XENIX

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Operating System (OS)
Feed back queue

require manual intervention to implement properly
are used to favor real-time tasks
are very easy to implement
None of these
dispatch tasks according to execution characteristics

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Operating System (OS)
Operating system

enables the programmer to draw a flowchart
None of these
All of these
links a program with the subroutines it references
provides a layered, user-friendly interface

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