7. Assume an architecture that uses base and limit register for memory management. The memory manager uses variable sized partition allocation. The current memory allocation is as shown below.

There is a new memory request for 9 Kbytes. Can this allocation be satisfied? If not why not? What is the amount of external fragmentation represented by the above figure?

Solution:

8. What is the relationship between page size and frame size in a paged memory system?

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9. In terms of hardware resources needed (number of new processor registers and additional circuitry to generate the physical memory address given a CPU generated address) compare base and limit register solution with a paged virtual memory solution.

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10. Please answer the following question upon the figure shown in the following about page table,

1) What are the page number, and offset?

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2) What is the corresponding frame number?

Solution:

Allocation table Start address 8K 11K 13K Size 8K 3K 2K 2K Process FREE FREE Memory 8K 3K (P3) 2K (P4)