In a certain cache system, the modified cache block is written to main memory only when the block is replaced. All of the following are used to describe this policy except__.
A store-in B write-back C copy-back D write-through
Assume that an operating system uses a round-robin scheduler. The process's quantum is 20msec, and the context switch is 5 msec. What percentage of the CPU's time is spent on administrative overhead?__.
A 5% B 15% C 20% D25%
Which MS-DOS command is correct?__
A DEL /S*BAT
B DEL *.EXE/SP
C DEL *.OBJ>NUL:
D DEL *.com*.sys
