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

which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
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
have both their operands in the main store.
All of these

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Operating System (OS)
The function(s) of the Storage Assignment is (are)

to assign storage to all temporary locations that are necessary for intermediate results.
to assign storage to all variables referenced in the source program.
None of these
All of these
to assign storage to literals, and to ensure that the storage is allocate and appropriate locations are initialized.

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