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What does PMMU stands for?

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What does PMMU stands for?

(a) protection mode memory management unit

(b) paged memory management unit

(c) physical memory management unit

(d) paged multiple management unit

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Question is taken from Segmentation and Paging in division Memory Systems of Embedded Systems

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Right option is (b) paged memory management unit

The best I can explain: The paged memory management unit is used to decrease the amount of storage needed in the page tables, that is, a multi-level tree structure is used. MC68030, PowerPC, ARM 920 uses a paged memory management unit.

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