The GATE Grind

GATE 2021 CS – Question 21

Operating System · Memory Management and Virtual Memory · 1 mark · Multiple select

In the context of operating systems, which of the following statements is/are correct with respect to paging?

  1. Paging helps solve the issue of external fragmentation.
  2. Page size has no impact on internal fragmentation.
  3. Paging incurs memory overheads.
  4. Multi-level paging is necessary to support pages of different sizes.

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Show answer and explanation

Correct answer: (A) Paging helps solve the issue of external fragmentation.; (C) Paging incurs memory overheads.

Explanation

Paging removes external fragmentation and needs page tables (memory overhead). Page size does affect internal fragmentation, and multi-level paging is not needed for varying page sizes.