Logic Gates (OR. AND. NOT. NAND and NOR) NEET Questions

Physics - Electronic Devices

Logic Gates (OR. AND. NOT. NAND and NOR) MCQ Questions


13.
The truth table of AND gate shows Y = 1 when:
A.
A = 1 and B = 0
B.
Both A = 0 and B = 0
C.
Either A or B is 1
D.
Both A = 1 and B = 1
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ANSWER :
D. Both A = 1 and B = 1
14.
An AND gate can be realized using:
A.
One capacitor
B.
Two resistors only
C.
Two diodes connected with a series resistor to supply voltage
D.
Two diodes in parallel
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ANSWER :
C. Two diodes connected with a series resistor to supply voltage
15.
If two switches are connected in SERIES with a lamp, the circuit behaves like:
A.
OR gate
B.
NOT gate
C.
AND gate
D.
NOR gate
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ANSWER :
C. AND gate
16.
In a 3-input AND gate, the output is HIGH (1) when:
A.
At least one input is HIGH
B.
All three inputs are HIGH (1)
C.
Two of three inputs are HIGH
D.
Any input is HIGH
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ANSWER :
B. All three inputs are HIGH (1)
17.
A NOT gate has:
A.
One input and one output, output is the complement of input
B.
One input and two outputs
C.
Two inputs and two outputs
D.
Two inputs and one output
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ANSWER :
A. One input and one output, output is the complement of input
18.
The Boolean expression for a NOT gate with input A is:
A.
Y = A ยท B
B.
Y = Aฬ… (or Y = A')
C.
Y = A โŠ• A
D.
Y = A + B
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ANSWER :
B. Y = Aฬ… (or Y = A')