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Digital Electronics

Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 binary code
 cyclic code
 2421 code
 8421 code

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Digital Electronics
A gate is inhibited when its inhibit input is at logic 1. The gate is

 OR
 NAND
 none of these
 AND

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Digital Electronics
The X-OR and X-NOR gates can have how many inputs?

 1
 2
 4
 any number

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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
An 8 × 4 ROM contains a decoder of size

 3 × 4
 8 × 4
 3 × 8
 8 × 8

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Digital Electronics
A self-complementing code for the decimal digits is created using the weight 4 4 3 -2. The value of 8592 in the code is

 1100 1001 1111 1000
 1000 0101 1001 0010
 1100 1011 1111 1001
 1100 0111 1111 0011

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