Operating System (OS)
In memory systems, boundary registers

are used for temporary program variable storage
track the beginning and ending of programs
None of these
track page boundaries
are only necessary with fixed partitions

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Operating System (OS)
Addressing structure

All of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
defines the fundamental method of determining effective operand addresses
None of these

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