Question { 10231 }

among the chebsew and butterworth filter which is more
efficient?

Answer

Chebyshev filter is more efficient than butterworth filter.
It has sharp cut at the stop band even though it hase some
ripples in the pass band

Question { 11698 }

which is effective parallel or serial communication?

Answer

There is a trade off in serial and parallel communicaton.
Parallel communication is faster than serial communication
but it requies lot of hardware. Parallel communication is
less used than serial which requires less hardware and easy
to implemen.