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The I/O interface required to connect the I/O device to the bus consists of ______

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The I/O interface required to connect the I/O device to the bus consists of ______

(a) Address decoder and registers

(b) Control circuits

(c) Address decoder, registers and Control circuits

(d) Only Control circuits

The question was asked in an interview.

Enquiry is from Functional Units of a Computer in section Basic Structures of Computers of Computer Architecture

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The correct answer is (c) Address decoder, registers and Control circuits

Explanation: The I/O devices are connected to the CPU via BUS and to interact with the BUS they have an interface.

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