Operating System (OS)
A real time operating system is most likely to be used for which of the following task?

Controlling the fuel injection system of an automobile engines
Ensuring that system clock works correctly on server
Managing the access to system files in a laptop computers
Controlling access to a shared printer in a network

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Operating System (OS)
A critical region is

a program segment where shared resources are accessed
a program segment that has not been proved bug-free
none is the above
a program segment that often causes unexpected system crashes
one which is enclosed by a pair of P and V operations on semaphores

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