Question

An RS-232 interface is:
(1) A parallel interface
(2) A serial interface
(3) Printer interface
(4) A modem interface

Answer 1

An RS 232 interface is mostly used as a parallel interface and also as a serial interface.

so the answer is option number 1 and 2

a parallel interface and a serial interface

Answer 2

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Interfacing can be defined as transferring data between microcontrollers and interfacing peripherals such as sensors, keypads, microprocessors, analog to digital converters or ADC, LCD displays, motors, external memories, even with other microcontrollers, some other interfacing peripheral devices and so on or input ...