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Digital Electronics

Digital Electronics
A combinational circuit can be designed using only

 OR gates
 NOR gates
 OR and X-NOR gates
 AND gates

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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?

 2:1
 2:3
 1:1
 1:2

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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

 4
 0
 1
 2

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Digital Electronics
The state of a flip-flop can be switched by changing its ________ signals.

 output
 triggering
 input
 clearing

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Digital Electronics
One bit full adder has ________ inputs

 3
 4
 any number
 2

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Digital Electronics
The boolean algebra is mostly based on

 Boolean theorem
 De Morgans theorem
 De Morpans theorem
 Standard theorem

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