Linux IPC Question:
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Why do we have serial and parallel interface, which one was faster and why and when we should go for this interface?

Answer:

Parallel interface works efficiently for short transmittance
distance, for longer ranges the link cribs because of EMI
and other interferences.
Serial on the other hand supports longer ranges as it is a
sole carrier of bits

so long range and slow transmission :serial
short range and faster transmission : parallel

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