GATE Overflow Test Series | Operating Systems | Test 2 | Question: 8

Question

Which of the following is/are correct? (Mark all the appropriate choices)

• A. Paging avoids external fragmentation
• B. Paging avoids internal fragmentation
• C. Segmentation avoids external fragmentation
• D. Segmentation avoids internal fragmentation

Answer 1

Paging uses constant-size blocks of memory, and thus minimizes external fragmentation at the expense of internal if the memory allocated is less than a page.

Contiguous-memory allocation and segmentation use variable-size blocks of memory, thus minimizing internal fragmentation at the expense of possible external fragmentation in trying to fit these blocks into memory.

So, the correct answer is $A;D.$