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The RS232 is also known as

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The RS232 is also known as

(a) UART

(b) SPI

(c) Physical interface

(d) Electrical interface

This question was posed to me by my school principal while I was bunking the class.

My question is from RS232 in division Basic Peripherals of Embedded Systems

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Right option is (d) Electrical interface

To elaborate: The RS232 is also known as the physical interface and it is also known as EIA232.

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