Logic Gates
Trending Questions
Q.
Why logic gates are used?
Q. Name the gate represented by the following circuit.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/614287/original_Q13.PNG)
- OR gate
- XOR gate
- AND gate
- NAND gate
Q.
Where are logic gates used?
Q.
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
NOR
OR
NAND
AND
Q.
For the circuits shown below, the Boolean polynomial is
Q. How many NAND gates are used in an OR gate?
- Four
- Two
- Three
- Five
Q.
Boolean algebra is essentially based on ?
Truth
Logic
Symbol
Numbers
Q. As the switch S is closed in the circuit shown in figure, current passing through it will be
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1195716/original_10q.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1195716/original_10q.png)
- 25/8 A
- 8/25 A
- 4.5 A
- 6.0 A
Q. In the circuit as shown in figure, A and B represent two inputs and C represents the
![](https://tnl-content-images.s3-us-west-2.amazonaws.com/xml-migration/816c025bff52b1d15d391445e08140f4635066389936167854_4492662.png)
![](https://tnl-content-images.s3-us-west-2.amazonaws.com/xml-migration/816c025bff52b1d15d391445e08140f4635066389936167854_4492662.png)
- OR gate
- NOR gate
- AND gate
- NAND gate
Q. NOT gates are used to reverse the input signal.
- False
- True
Q. The output of a XOR gate is high when
- both the inputs are high
- both the inputs are low
- one input is high while another is low
- None of these
Q. The correct Boolean operation represented by the circuit diagram drawn is
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/543896/original_61.png)
- AND
- OR
- NAND
- NOR
Q. To get an output Y = 1 from the circuit shown in figure the inputs A, B and C must be respectively ![](https://tnl-content-images.s3-us-west-2.amazonaws.com/xml-migration/3b62679ca4163106da1d68bd4ffd9af8635066385930619762_6934342.png)
![](https://tnl-content-images.s3-us-west-2.amazonaws.com/xml-migration/3b62679ca4163106da1d68bd4ffd9af8635066385930619762_6934342.png)
- 1, 0, 1
- 1, 1, 0
- 0, 1, 0
- 1, 0, 0
Q.
Which represents NAND gate
Q. Figure shows a combination of logic gates. To what single gate is this combination equivalent?
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/614285/original_Q12.PNG)
- XNOR
- NOR
- XOR
- NOR
Q.
A logic gate is an electronic circuit which
Makes logic decisions
Allows electrons flow only in one direction
Works binary algebra
Alternates between 0 and 1 values
Q.
The logic circuit below has the input waveforms A and B as shown. Pick out the correct output waveform.
Q. ![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/507953/original_Capture.PNG)
If A = 1 and B = 0, then find X and Y.
If A = 1 and B = 0, then find X and Y.
- X = 0, Y = 1
- X = 1, Y = 1
- X = 0, Y =0
- X = 1, Y = 0
Q. The correct truth table for the following logic circuit is:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1197799/original_37.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1197799/original_37.png)
- ABY000011100111
- ABY000011101110
ABY001010101110- ABY001010100111
Q. The boolean expression for output Y of a system shown in the figure will be :
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1326065/original_19q.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1326065/original_19q.png)
- (¯¯¯¯A+¯¯¯¯B)(A+B)
- A.¯¯¯¯B+¯¯¯¯A.B
- ¯¯¯¯A.¯¯¯¯B+A.B
- A.B+(¯¯¯¯A+¯¯¯¯B)
Q. Identify the logic operation carried out by the following circuit.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1517005/original_18Q.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1517005/original_18Q.png)
- NAND
- OR
- NOR
- AND
Q. To get an output Y = 1 from the circuit shown in figure the inputs A, B and C must be respectively ![](https://tnl-content-images.s3-us-west-2.amazonaws.com/xml-migration/3b62679ca4163106da1d68bd4ffd9af8635066385930619762_6934342.png)
![](https://tnl-content-images.s3-us-west-2.amazonaws.com/xml-migration/3b62679ca4163106da1d68bd4ffd9af8635066385930619762_6934342.png)
- 1, 0, 1
- 1, 1, 0
- 0, 1, 0
- 1, 0, 0