Operating System (OS)
Capacity planning

requires detailed system performance information
is not needed in small installations
does not depend on the monitoring tools available
is independent of the operating system
None of these

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Operating System (OS)
Addressing modes

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

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Operating System (OS)
The CPU, after receiving an interrupt from an I/O device

halts for a predetermined time
branches off to the interrupt service routine after completion of the current instruction
hands over control of address bus and data bus to the interrupting device
branches off to the interrupt service routine immediately
None of these

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