Operating System (OS)
Memory

is a sequence of instructions
is a device that performs a sequence of operations specified by instructions in memory.
None of these
is typically characterized by interactive processing and time-slicing of the CPU
is the device where information is stored

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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.
None of these
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".
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
contains the address of the memory location that is to be read from or stored into.

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Operating System (OS)
System generation:

None of these
is always quite simple
requires extensive tools to be understandable
is always very difficult
varies in difficulty between systems

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