单选题：Consider a demand-paging system with the following time-measured
Consider a demand-paging system with the following time-measured utilizations:@[D](1)
```
CPU utilization 20%
Paging disk 97.7%
Other I/O devices 5%
```
Which (if any) of the following will (probably) improve CPU utilization?
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
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
答案：D
```
CPU utilization 20%
Paging disk 97.7%
Other I/O devices 5%
```
Which (if any) of the following will (probably) improve CPU utilization?
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
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
答案：D