Operating System (OS)
The Register - to - Register (RR) instructions

which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, except in the case of store operation when it is also
which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
None of these
All of these
have both their operands in the main store.

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Operating System (OS)
Memory management is :

not used on multiprogramming systems
None of these
critical for even the simplest operating systems
not used in modern operating system
replaced with virtual memory on current systems

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Operating System (OS)
A Processor

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

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