Operating System (OS)
The file structure that redefines its first record at a base of zero uses the term:

key fielding
None of these
relative organization
dynamic reallocation
hashing

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Operating System (OS)
Addressing modes

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

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