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Digital Electronics

Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 1 and 3
 1 and 4
 0 and 3
 0 and 4

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Digital Electronics
In Boolean algebra A.A is equal to

 1
 2A
 A
 A²

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Digital Electronics
Which of these circuits will give yield carry with more delay 1. Carry look ahead adder 2. Ripple carry adder

 1.
 2.
 none
 both are same

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Digital Electronics
In a T flip-flop no of input circuit is

 1
 4
 3
 2

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Digital Electronics
Combinations that are not listed for the input variables are

 Carry
 Overflow
 Don't Care
 Borrow

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Digital Electronics
(11011) 2 in BCD 8421 code is

 00100111
 11011001
 01101100
 00011011

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