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If the offset is legal :

  • A.it is used as a physical memory address itself
  • B.it is subtracted from the segment base to produce the physical memory address
  • C.it is added to the segment base to produce the physical memory address
  • D.none of the mentioned

Answer: A

Correct answer: it is added to the segment base to produce the physical memory address

The logical address is a pair: the segment number selects the entry and the offset says how far into the segment. The physical address is therefore

\[ \text{physical} = \text{base} + d \]

An offset used as a physical address on its own would ignore where the segment actually sits in memory.

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