Operating System (OS)
What is the name given to the software which can be legally compiled and often used for free?

Mindware
Public domain program
Shareware program
Firmware program
None of these

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Operating System (OS)
Multiprogramming systems:

None of these
are used only on large mainframe computers
execute each job faster
execute more jobs in the same time period
are easier to develop than single programming system

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Operating System (OS)
Semaphores

synchronize critical resources to prevent contention
are used to do I/O
None of these
are used for memory management
synchronize critical resources to prevent deadlock

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