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

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

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Operating System (OS)
Which, of the following, is true for testing and debugging?

Testing detects the syntax errors in the program while debugging corrects those errors in the program
Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program
Testing and debugging indicate the same thing
All of these
None of these

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Operating System (OS)
Semaphores

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

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