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

Ensuring that system clock works correctly on server
Managing the access to system files in a laptop computers
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)
A public key encryption system

None of these
does not encode the data before transmitting it
allows anyone to decode the transmission
allows only the correct sender to decode the data
allows only the correct receiver to decode the data

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Operating System (OS)
The Memory Buffer Register (MBR)

is a hardware memory device which denotes the location of the current instruction being executed.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
contains the address of the memory location that is to be read from or stored into.
None of these

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