(Choose 1 answer)
Imagine that a certain printer can print 400 characters per second and that the time to write a character to the printer's output register is so short it can be ignored. If to run this printer using interrupt-driven I/O and each character printed requires an interrupt that takes 50 µsec all-in to service. How many percent of the CPU does the interrupt overhead cost?
A. 2% of the CPU
B. 98% of the CPU
C. 4% of the CPU
D. 96% of the CPU
Q: 27
