Which logic gate is represented by the following combination of logic gates?

1. OR
2. NAND
3. AND
4. NOR

Subtopic:  Logic gates |
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The output (X) of the logic circuit shown in figure will be:

1. X = $\overline{\mathrm{A}·\mathrm{B}}$

2. X = A.B

3. X = $\overline{\mathrm{A}+\mathrm{B}}$

4. X = $\overline{\overline{\mathrm{A}}}·\overline{\overline{\mathrm{B}}}$

Subtopic:  Logic gates |
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The figure shows a logic circuit with two inputs A and B and the output C. The voltage waveforms across A, B, and C are as given. The logic circuit gate is:

1. OR gate

2. NOR gate

3. AND gate

4. NAND gate

Subtopic:  Logic gates |
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To get output Y = 1 in the given circuit which of the following input will be correct:

 A B C 1. 1 0 1 2. 1 1 0 3. 0 1 0 4. 1 0 0

Subtopic:  Logic gates |
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The symbolic representation of four gates is shown as:

Pick out which ones are for AND, NAND, and NOT gates, respectively.

1.  (i), (iv), and (iii)

2.  (ii), (iii), and (iv)

3.  (ii), (iv), and (iii)

4.  (ii), (iv), and (i)

Subtopic:  Logic gates |
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To get an output Y = 1 from the circuit shown below, the input must be:

1. A=0 B=1 C=0

2. A=0 B=0 C=1

3. A=1 B=0 C=1

4. A=1 B=0 C=0

Subtopic:  Logic gates |
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The following figure shows a logic gate circuit with two inputs A and B, and the output Y. The voltage waveforms of A, B and Y are as given.

The logic gate is:

1. OR gate

2. AND gate

3. NAND gate

4. NOR gate

Subtopic:  Logic gates |
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The symbolic representation of four logic gates are as shown:
(i)
(ii)
(iii)
(iv)
The logic symbols for OR, NOT and NAND gates are respectively:
1. (iii), (iv), (ii)
2. (iv), (i), (iii)
3. (iv), (ii), (i)
4. (i), (iii), (iv)

Subtopic:  Logic gates |
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The circuit is equivalent to:

1.  AND gate

2.  NAND gate

3.  NOR gate

4.  OR gate

Subtopic:  Logic gates |
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In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table:

1.
 A B Y 0 0 0 0 1 0 1 0 0 1 1 1
2.
 A B Y 0 0 1 0 1 1 1 0 1 1 1 0
3.
 A B Y 0 0 1 0 1 0 1 0 0 1 1 1
4.
 A B Y 0 0 0 0 1 1 1 0 1 1 1 1
Subtopic:  Logic gates |
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