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

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Operating System (OS)
The advantage of a command processor running only built-in commands is:

users can create system programs and run them as commands
the command set being common across different hardware configurations
the processing is much faster than would other-wise be the case when user defined commands are used
None of these
flexibility to the users in running lists of commands by simply collecting them in named batch command files

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