If the number of cycles spent busy – waiting is not excessive, then ____________
A. interrupt driven I/O is more efficient than programmed I/O
B. programmed I/O is more efficient than interrupt driven I/O
C. both programmed and interrupt driven I/O are equally efficient
D. none of the mentioned
Answer:B
If the number of cycles spent busy – waiting is not excessive, then ____________
A. interrupt driven I/O is more efficient than programmed I/O B. programmed I/O is more efficient than interrupt driven I/O C. both programmed and interrupt driven I/O are equally efficient D. none of the mentioned