For the daisy chain scheme of connecting I/O devices, which of the following…
1996
For the daisy chain scheme of connecting I/O devices, which of the following statements is true?
- A.
It gives non-uniform priority to various devices
- B.
It gives uniform priority to all devices
- C.
It is only useful for connecting slow devices to a processor device
- D.
It requires a separate interrupt pin on the processor for each device
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Correct answer: A
In a daisy chain interrupt scheme, I/O devices are connected in series, so the device closest to the CPU gets the highest priority and the farthest gets the lowest priority. Hence, priority is non-uniform among devices.
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