Which of the following is not a characteristic of a daisy chaining priority control scheme?
A
priority is programmable
B
it is relatively easy to add more devices to the chain
C
the failure of one device may affect other devices on the chain
D
the number of control lines is independent of the number of devices on the chain
E
None of the above
Correct Answer: priority is programmable
In computing, a programmable interrupt controller (PIC) is an integrated circuit that helps a microprocessor (or CPU) handle interrupt requests (IRQ) coming from multiple different sources (like external I/O devices) which may occur simultaneously.