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Digital Electronics

Digital Electronics
The 7-bit Hamming code is used to transmit

 no data bits
 3 data bits
 7 data bits
 4 data bits

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Digital Electronics
A demultiplexer is a

 N-to-1 device
 N-to-N device
 1-to-1 device
 1-to-N device

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Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 AND
 X-NOR
 X-OR
 OR

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Digital Electronics
A half adder has

 2 inputs and 2 output
 1 input and 2 outputs
 1 input and 1 output
 2 inputs and 1 outputs

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Digital Electronics
Which of the following BCD codes with an odd parity bit included in the end of code group, have error in the code? (I)1001010110000 (II)0100011101100 (III)0111110000011 (IV)1000011000101

 Both (I) & (II)
 Both (I)&(IV)
 Both (II)&(III)
 Only (II)

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Digital Electronics
It is desired to have a 64 × 8 ROM. The ROMs available are of 16 × 4 size. The number of ROMs required will be

 4
 8
 6
 2

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