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GATE EE

Logic Gates

Digital Electronics

Previous Years Questions

Marks 1

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A bulb in staircase has two switches, one switch being at the ground floor and the other one at the first floor. The bul...
GATE EE 2013
The complete set of only those Logic Gates designated as Universal gates is
GATE EE 2009
The digital circuit using two inverters shown in figure will act as ...
GATE EE 2004
The output of a logic gate is $$''1''$$ when all its inputs are at logic $$''0''.$$ The gate is either
GATE EE 2001
The Boolean expression for the output of the logic circuit shown in figure is ...
GATE EE 1996

Marks 2

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$$A,B,C$$ and $$D$$ are input bits, and $$Y$$ is the output bit in the $$XOR$$ gate circuit of the figure below. Which o...
GATE EE 2007
In the figure, as long as $${X_1} = 1$$ and $${X_2} = 1,$$ the output $$Q$$ remains ...
GATE EE 2005
A digital circuit which compares two numbers $${A_3}{A_2}{A_1}{A_0},\,\,{B_3}{B_2}{B_1}{B_0}$$ is shown in Fig. To get o...
GATE EE 2004
For the circuit shown in Fig. the Boolean expression for the output $$Y$$ in terms of inputs $$P,$$ $$Q,$$ $$R$$ and $$S...
GATE EE 2002
The logic function $$f = \overline {\left( {x.\overline y } \right) + \left( {\overline x .y} \right)} $$ is the same as...
GATE EE 1999
For a flip-flop formed from two $$NAND$$ gates as shown in figure. The unusable state corresponds to ...
GATE EE 1999

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