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

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
Controlling access to a shared printer in a network

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Operating System (OS)
Feed back queue

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

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Operating System (OS)
What is dispatch latency ?

The time taken by the processor to write a file into disk
The whole time taken by all processor
None of the listed here
The time taken by the dispatcher to stop one process and start another

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