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The essential content(s) in each entry of a page table is / are

  1. Virtual page number

  2. Page frame number

  3. Both virtual page number and page frame number

  4. Access right information

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Best answer
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It is (B).

The page table contains the page frame number essentially.

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A page table entry contains

Present bit

Modify bit

Other control bits

And frame number.

And, page number is used to index this table.

Hence, B) is essential anytime.
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