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Computer Hardware - Engineering

Q1:

How many IRQs does a chain of USB devices require?

A 1

B 2

C 3

D 4

E None of the above

ANS:A - 1

One of the biggest advantages of USB is that the entire chain of devices requires only a single IRQ from the host computer. With modern PCs suffering from an interrupt shortage, this is a major benefit, one which should spur the adoption of this interface for lower-speed devices.