1) What is a multiplexer? a) it is a type of decoder which decodes several inputs and gives one output b) A multiplexer is a device which converts many signals into one c) It is a type of encoder which decodes several inputs and gives one output 2) How many bits are needed to store one BCD digit? a) 2 b) 4 c) 6 d) 7 e) 8 f) 9 3) What is the binary subtraction of 101001 - 010110 =? a) 010011 b) 010010 c) 110011

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