-操作系统精髓与设计原理(第五版)+课后题答案1(7)

-操作系统精髓与设计原理(第五版)+课后题答案1

CHAPTER 7

MEMORY MANAGEMENT

Review Questions

7.1 Relocation, protection, sharing, logical organization, physical

organization.

7.7 A logical address is a reference to a memory location independent of the

current assignment of data to memory; a translation must be made to a physical address before the memory access can be achieved. A relative address is a particular example of logical address, in which the address is expressed as a location relative to some known point, usually the

beginning of the program. A physical address, or absolute address, is an actual location in main memory.

Problems

7.6 a. The 40 M block fits into the second hole, with a starting address of 80M.

The 20M block fits into the first hole, with a starting address of 20M. The 10M block is placed at location 120M.

40M40M60M40M30M40M40M

b. The three starting addresses are 230M, 20M, and 160M, for the 40M, 20M, and 10M blocks, respectively.

40M60M60M40M30M40M40M

c. The three starting addresses are 80M, 120M, and 160M, for the 40M, 20M, and 10M blocks, respectively.

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