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Which of the following can affect the long distance communication?

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Which of the following can affect the long distance communication?

(a) clock

(b) resistor

(c) inductor

(d) capacitor

I had been asked this question during an interview for a job.

This interesting question is from RS232 topic in division Basic Peripherals of Embedded Systems

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Right choice is (a) clock

The explanation: For small distance communication, the clock signal which allows a synchronous transmission of data is more than enough, and the low voltage signal of TTL or CMOS is sufficient for the operation. But for long distance communication, the clock signal may get skewed and the low voltage can be affected by the cable capacitance. So for long distance communication RS232 can be used.

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asked Oct 9, 2021 in Embedded Systems by Kennedy (271k points)
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