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

None of these
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.
have both their operands in the main store.
All of these

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Operating System (OS)
A page fault

occurs when a program accesses a page of memory
None of these
is an access to a page not currently in memory
is a reference to a page belonging to another program
is an error is a specific page

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