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Digital Electronics

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
The decimal equivalent of hexadecimal number “BEED” is

 none
 47,877
 48,777
 48,877

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Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:1
 1:2
 2:3
 1:1

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Digital Electronics
The output of a NAND gate is low

 only when all the inputs are low
 only when at least one input is high
 only when all the inputs are high
 only when at least one input is low

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Digital Electronics
The number of parity bits in a 12-bit Hamming code is

 8
 4
 6
 5

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Digital Electronics
The number of digit 1 present in the binary representation of (3 × 512 + 7 × 64 + 5 × 8 + 3) is

 7
 9
 6
 8

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