Operating System (OS)
An incremental backup

saves only files that have recently changed
None of these
saves all files
uses more tapes
should be done each month

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

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

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

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

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