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Digital Electronics

Digital Electronics
The XS-3 code is a

 weighted code
 error-correcting code
 cyclic code
 self-complementing code

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 5 V and 0 V
 0 V and 5 V
 –1.5 V and – 0.5 V
 1 V and 5 V

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Digital Electronics
Digital circuit can be made by the repeated use of ___________

None of these
OR gates
NOT gates
NAND gates

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Digital Electronics
The output of a gate is HIGH when at least one of its inputs is LOW. It is true for

 NAND
 X-OR
 NOR
 OR

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Digital Electronics
What is the minimum number of NOR gates required realizing an X-OR gating?

 3
 6
 4
 5

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Digital Electronics
What is the Boolean expression for a two-input AND gate ?

 A & B
 A - B
 A.B
 A + B

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