NIELIT 2021 Dec Scientist B - Section B: 69

Question

If the size of the logical address space is $2^{m}$ and the page size is $2^{n}$ addressing units, then the high order $\text{m-n bits}$ of a logical address designate the _____________ .

• A. offset 
• B. page no 
• C. frame no
• D. physical address

Answer 1

page number

offset

                 m-n bit                                                              n nit

logical address space =2^m. so m bit require to represent the address space 

page size=2^n. so n bit require for offset.

so page number =m-n.

Ans is option B.