4.A system with 32-bit addresses 1GB main memory, and a 1 megabyte(20-bit) page size will have a page table that contains () entries.
编号
选项
A
4K
B
4M
C
1M
D
1K
5.In a system using segmentation, the logical address is expressed in 32 bits within which 20 bits are used as segment number. The maximum size of each sehment is_.
编号
选项
A
2^12
B
2^16
C
2^20
D
2^32
6.虚拟存储管理系统的基础是程序的()理论。
编号
选项
A
动态性
B
全局性
C
局部性
D
虚拟性
7.()是请求分页存储管理方式和基本分页存储管理方式的区别。
编号
选项
A
不必将作业装入连续区域
B
地址重定向
C
采用快表技术
D
不必将作业全部装入内存
8.引入TLB(快表)是为了解决分页时两次内存访问的问题。
编号
选项
A
对
B
错
9.在请求分页式系统中,以页为单位管理用户的虚空间,以段为单位管理内存空间。
编号
选项
A
对
B
错
10.Consider a demand-paging system with the following time-measured utilizations:
CPU utilization 20%
Paging disk 97.7%
Other I/O devices 5%
Which (if any) of the following will (probably) improve CPU utilization?
编号
选项
A
to install a faster hard disk
B
to increase swap space with large capacity hard disk
C
to increase the number of running processes
D
to increase physical memory capacity via increasing memory chips
4.In a demanding paging system, the size of a page is 4KB. A process access the logical address 12345(0x3039)will ___ if the page table is as the following:
Page#
Frame#
Vaildity
0
3
v
1
4
v
2
2
v
3
-
i
编号
选项
A
access physical address 4*4096+57
B
access physical address 3*4096+57
C
access physical address 2*4096+57
D
cause a page-fault interrupt
5.在请求分页系统中,若逻辑地址中的页号超过页表寄存器中的页表长度,则会引起()。
编号
选项
A
输入输出中断
B
时钟中断
C
越界中断
D
缺页中断
6.With the demanding paging,__has best system performance.
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