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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

 none
 1
 both have same
 2

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Digital Electronics
An AND gate can be imagined as

 switches connected in series
 transistors connected in paralle
 switches connected in parallel
 transistors connected in series

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 1’s complement is used to represent the numbers, then the range will be

 -128 to 127
 -256 to 256
 -127 to 127
 -256 to 255

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Digital Electronics
(11011) 2 in BCD 8421 code is

 01101100
 00011011
 11011001
 00100111

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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 0111 1111 0011
 1100 1011 1111 1001

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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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