Operating System (OS)
Addressing modes

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

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Operating System (OS)
A program

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

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