The combination of ‘NAND’ gates shown here under (figure) are equivalent to

1. An OR gate and an AND gate respectively
2. An AND gate and a NOT gate respectively
3. An AND gate and an OR gate respectively
4. An OR gate and a NOT gate respectively.

Subtopic:  Logic gates |
 69%
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A truth table is given below. Which of the following has this type of truth table 

A  0  1  0  1
B  0  0  1  1
y  1  0  0  0

(1) XOR gate

(2) NOR gate

(3) AND gate

(4) OR gate

Subtopic:  Logic gates |
 81%
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For the given combination of gates, if the logic states of inputs A, B, C are as follows A = B = C = 0 and A = B = 1, C = 0 then the logic states of output D are

(1) 0, 0

(2) 0, 1

(3) 1, 0

(4) 1, 1

Subtopic:  Logic gates |
 74%
From NCERT
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Boolean algebra is essentially based on 

(1) Truth

(2) Logic

(3) Symbol

(4) Numbers

Subtopic:  Logic gates |
 65%
From NCERT
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 The logic behind the ‘NOR’ gate is that it gives

(1) High output when both the inputs are low

(2) Low output when both the inputs are low

(3) High output when both the inputs are high

(4) None of these

Subtopic:  Logic gates |
 84%
From NCERT
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A logic gate is an electronic circuit which 

(1) Makes logic decisions

(2) Allows electrons flow only in one direction

(3) Works binary algebra

(4) Alternates between 0 and 1 values

Subtopic:  Logic gates |
From NCERT
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A gate has the following truth table 
P 1 1 0 0
Q 1 0 1 0
R 1 0 0 0

The gate is

(1) NOR

(2) OR

(3) NAND

(4) AND

Subtopic:  Logic gates |
 82%
From NCERT
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Which of the following gates will have an output of 1

1. 

2. 

3. 

4. 

Subtopic:  Logic gates |
 85%
From NCERT
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Which represents NAND gate

1. 

2. 

3. 

4. 

Subtopic:  Logic gates |
 90%
From NCERT
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What will be the input of A and B for the Boolean expression A+B¯·A·B¯=1

(1) 0, 0

(2) 0, 1

(3) 1, 0

(4) 1, 1

Subtopic:  Logic gates |
 75%
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