Operating System (OS)
A development strategy whereby the executive control modules of a system are coded and tested first, is known as

None of these
Top-down development
Left-Right development
Bottom-up development
All of these

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Operating System (OS)
The term "operating system" means

a set of programs which controls computer working
the way a computer operator works
the way a floppy disk drive operates
None of these
conversion of high level language into machine code

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