Operating System (OS)
Addressing structure

performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
None of these
All of these
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

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Operating System (OS)
A linker

None of these
must be run after the loader
is not necessary with variable partitions
creates a load module
is not needed with a good compiler

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Operating System (OS)
Trojan-Horse programs

None of these
are hidden programs that do not show up on the system
do not usually work
usually are immediately discovered
are legitimate programs that allow unauthorized access

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