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Digital Electronics

Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:3
 2:1
 1:2
 1:1

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Digital Electronics
For the design of a combinational circuit with four inputs using only NAND gates, the number of K-maps required for the simplification process is

 1
 2
 0
 4

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Digital Electronics
11001, 1001 and 111001 correspond to the 2’scomplement representation of the following set of numbers

 -6, -6 and -6 respectively
 -25, -9 and -57 respectively
 25, 9 and 57 respectively
 -7, -7 and -7 respectively

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Digital Electronics
A system has following negative numbers stored in binary form as shown. The wrongly stored number is

 -48 as 11101000
 -37 as 11011011
 -32 as 11100000
 -89 as 10100111

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Digital Electronics
A flip flop is a _______ circuit.

 Combinational
 Sequential
 None
 Both A and B

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Digital Electronics
An all or nothing gate is the other name of

 AND gate
 X-OR gate
 OR gate
 X-NOR gate

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