Question

______ to increase the flexibility of the serial ports.

(a) The wires used for ports is changed

(b) The ports are made to allow different clock signals for input and output

(c) The drivers are modified

(d) All of the mentioned

This question was posed to me in final exam.

This interesting question is from Serial Port topic in portion Input/Output Organisation of Computer Architecture

Answer 1

The correct choice is (b) The ports are made to allow different clock signals for input and output

To explain I would say: The ports are made more flexible by enabling the input or output of different clock signals for different devices.