Discussion
Which of the following statements about segmentation is TRUE ?
Answer: A
The true statement is that segmentation allows different segments to grow independently.
Segmentation divides a program into logical units of variable length, such as code, data, heap and stack, each with its own base and size. Because each segment is separate, a growing stack or table can be enlarged on its own without disturbing the others, which suits the programmer's view of memory.
The segment table stores both a base and a limit for each segment, and the limit is checked on every access, so option B is false. Only some systems combine segmentation with paging, so 'in all systems' is wrong. And because segments have variable sizes, segmentation suffers from external fragmentation rather than eliminating it; paging is what removes it.
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