Questions
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- 1. Find the correct combination of A, B, C and D inputs which can cause the LED to glow
2026 Hard - 2. For the given logic circuit, which of the following inputs combination will make both LED\(-1\) and LED\(-2\) to glow?
2026 Medium - 3. For the given logic gate circuit, which of the following is the correct truth table?
2026 Medium - 4. Identify the correct truth table of the given logical circuit.
2026 Medium - 5. If \(X\) and \(Y\) are the inputs, the given circuit works as _______.
2026 Easy - 6. Refer to the logic circuit given below. For two inputs \((A=1, B=1)\) and \((A=0, B=1)\), output \((Y)\) will be __________.
2026 Medium - 7. The correct truth table for the given input data of the following logic gate is:
2026 Medium - 8. The given circuit works as :
2026 Easy - 9. Two \(4\) bits binary numbers, \(A = 1101\) and \(B = 1010\) are given in the inputs of a logic circuit shown in figure below. The output \((Y)\) will be:
2026 Medium - 10. Two p-n junction diodes \(D _1\) and \(D _2\) are connected as shown in figure. A and B are input signals and C is the output. The given circuit will function as a ___________.
2026 Hard - 11.
\(\begin{array}{c|c|c} A & B & Y \\\hline 0 & 0 & 1 \\0 & 1 & 1 \\1 & 0 & 0 \\1 & 1 & 1\end{array}\)
To obtain the given truth table, following logic gate should be placed at G : 2025 Easy - 12. Consider the following logic circuit.
The output is \(\mathrm{Y}=0\) when : 2025 Medium - 13.
For the circuit shown above, equivalent GATE is : 2025 Easy - 14. The Boolean expression \(\mathrm{Y}=\mathrm{A} \overline{\mathrm{B}} \mathrm{C}+\overline{\mathrm{A}} \overline{\mathrm{C}}\) can be realised with which of the following gate configurations.
A. One 3-input AND gate, 3 NOT gates and one 2input OR gate, One 2-input AND gate,
B. One 3-input AND gate, 1 NOT gate, One 2input NOR gate and one 2-input OR gate
C. 3-input OR gate, 3 NOT gates and one 2-input AND gate
Choose the correct answer from the options given below. 2025 Medium - 15. The output of the circuit is low (zero) for:
(A) \(\mathrm{X}=0, \mathrm{Y}=0\)
(B) \(X=0, Y=1\)
(C) \(X=1, Y=0\)
(D) \(\mathrm{X}=1, \mathrm{Y}=1\)
Choose the correct answer from the options given below : 2025 Easy - 16. Following gates section is connected in a complete suitable circuit. For which of the following combination, bulb will glow \((ON)\)?
2024 Hard - 17. Identify the logic gate given in the circuit.
2024 Hard - 18. Identify the logic operation performed by the given circuit.
2024 Hard - 19. The output of the given circuit diagram is _______.
2024 Hard - 20. The output \(\mathrm{Y}\) of following circuit for given inputs is _______.
2024 Hard - 21. The truth of the given circuit diagram is _______.
2024 Hard - 22. The truth table for this given circuit is _______.
2024 Hard - 23. Name the logic gate equivalent to the diagram attached
2023 Medium - 24. The logic gate equivalent to the given circuit diagram is:
2023 Medium - 25. The logic operations performed by the given digital circuit is equivalent to:
2023 Medium - 26. A logic gate circuit has two inputs \(A\) and \(B\) and output \(Y\). The voltage waveforms of \(A, B\) and \(Y\) are shown below The logic gate circuit is.
2022 Medium - 27. Identify the logic operation performed by the given circuit
2022 Medium - 28. In the circuit, the logical value of \(A =1\) or \(B =1\) when potential at \(A\) or \(B\) is \(5\,V\) and the logical value of \(A=0\) or \(B=0\) when potential at \(A\) or \(B\) is \(0\,V\). The truth table of the given circuit will be :
2022 Hard - 29. In the following circuit, the correct relation between output \(( Y )\) and inputs \(A\) and \(B\) will be
2022 Hard - 30. Find the truth table for the function \(Y\) and \(A\) and \(B\) represented in the following figure.
2021 Medium - 31. Four \(NOR\) gates are connected as shown in figure. The truth table for the given figure is :
2021 Hard - 32. Identify the logic operation carried out by the given circuit :-
2021 Medium - 33. If \({V}_{{A}}\) and \({V}_{{B}}\) are the input voltages (either \(5\, {V}\) or \(0\, {V}\) ) and \({V}_{0}\) is the output voltage then the two gates represented in the following circuit \((A)\) and \((B)\) are:- \((A)\quad\quad\quad\quad(B)\)
2021 Hard - 34. In the following logic circuit the sequence of the inputs \({A}, {B}\) are \((0,0),(0,1),(1,0)\) and \((1,1)\). The output \(Y\) for this sequence will be :
2021 Medium - 35. The following logic gate is equivalent to
2021 Medium - 36. The output of the given combination gates represents
2021 Medium - 37. The truth table for the followng logic circuit is ...... .
2021 Hard - 38. Which one of the following will be the output of the given circuit?
2021 Hard - 39. Boolean relation at the output stage\(-Y\) for the following circuit is
2020 Medium - 40. Identify the operation performed by the circuit given below
2020 Medium - 41. In the following digital circuit, what will be the output at \('Z',\) when the input \((A, B)\) are \((1,0), (0,0),(1,1),(0,1)\)
2020 Hard - 42. In the given circuit, value of \(Y\) is
2020 Medium - 43. The logic gate equivalent to the given logic circuit is
2019 Medium - 44. The output of the given logic circuit is
2019 Hard - 45. The truth table for the circuit given in the fig is
2019 Medium - 46. To get output ‘\(1\)’ at \(R\), for the given logic gate circuit the input values must be
2019 Hard - 47. Truth table for the given circuit will be
2018 Hard - 48. If \(a,\, b,\,c,\,d\) are inputs to a gate and \(x\) is its output, then, as per the following time graph, the gate is
2016 Medium - 49. Given \(A\) and \(B\) are input terminals. Logic \(1\, = \,> 5\, V\) Logic \(0\, =\, < 1\, V\) Which logic gate operation, the above circuit does?
2014 Hard - 50. Identify the gate and match \(A, B, Y\) in bracket to check
2014 Hard
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Frequently asked
How many Boolean Algebra and Logic Gates questions came in JEE Mains?
50 questions from 2013–2026, each with the correct answer and a full solution.
How difficult are Boolean Algebra and Logic Gates questions?
10% are easy, 48% medium and 42% hard.