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Digital Electronics

Digital Electronics
Which of these circuits have higher gate complexity 1. Carry look ahead adder 2. Ripple carry adder

 1
 2
 none
 both have same

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Digital Electronics
If two numbers in excess-3 code are added and the result is less than 9, then to get equivalent binary

 0011 is added
 0011 is subtracted
 0110 is subtracted
 0110 is added

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Digital Electronics
Which of these sets of logic gates are designated as universal gates?

 OR, NOT, AND.
 NOR, NAND, XNOR.
 NOR, NAND.
 XOR, NOR, NAND.

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Digital Electronics
How many entries will be in the truth table of a 3 input NAND gate ?

 8
 6
 3
 9

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Digital Electronics
The switch which clears a flip-flop is know as

 None
 Reset
 Both A and B
 Clear

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Digital Electronics
Digital computers are more widely used as compared to analog computers, because they are

Easier to maintain
Always more accurate and faster
Useful over wider ranges of problem types
Less expensive

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