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Digital Electronics

Digital Electronics
What is the Boolean expression for a two-input AND gate ?

 A.B
 A + B
 A & B
 A - B

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Digital Electronics
Odd parity of a bit stream can be tested using ________ gate.

 NOR
 XOR
 AND
 OR

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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

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

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Digital Electronics
Unit distance code is the other name of

 sequential code
 self-complementing code
 XS-3 code
 cyclic code

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Digital Electronics
Which of the following is 1’s complement representation of +57

 00000001
 11000110
 01000110
 00111001

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Digital Electronics
The devices commonly used for making digital circuits are

 contact switches
 mechanical switches
 relays
 semiconductor devices

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