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Saturday, 31 October

JEE Main · Physics · Semiconductor Electronics: Materials, Devices and Simple Circuits

Combinational Logic Circuits

JEE Main asked Combinational Logic Circuits 31 times in 31 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023, 2024, 2025 and 2026. It belongs to Logic Gates, in Semiconductor Electronics: Materials, Devices and Simple Circuits (Physics). The longest wait between two years asking it was 1 year. In 2020, 2021, 2022, 2024, 2025 and 2026 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
31
in 31 shifts
Years
7 of 8
First asked
2020
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022, 2023, 2024, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.30.60’170.17’200.35’210.07’220.07’230.37’240.50’250.45’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 10 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 8 in 18 shifts · 2025: 4 in 8 shifts · 2026: 4 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20264 of 9
  • 20254 of 8
  • 20248 of 18
  • 20231 of 12
  • 20222 of 24
  • 202110 of 24
  • 20202 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Diagram based is the usual form. Skill tested: diagram reading.

  • Identify output of combinational logic circuit
  • Identify gate from combinational circuit

Difficulty

Easy 12Medium 19Hard 0

Every question was multiple choice.

Every question

All 31 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 6 Apr 2026, Shift 2 · Q43Refer to the logic circuit given below. For two inputs (A=1A=1, B=1B=1) and (A=0A=0, B=1B=1), output (YY) will be __________.EasyDiagram basedHas a figure
  2. 5 Apr 2026, Shift 1 · Q45For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow?EasyDiagram basedHas a figure
  3. 4 Apr 2026, Shift 1 · Q38Two 44 bits binary numbers, A=1101A=1101 and B=1010B=1010 are given in the inputs of a logic circuit shown in figure below. The output (YY) will…EasyDiagram basedHas a figure
  4. 2 Apr 2026, Shift 2 · Q30If X and Y are the inputs, the given circuit works asMediumDiagram basedHas a figure
  5. 7 Apr 2025, Shift 2 · Q45Consider the following logic circuit. The output is Y=0Y=0 when :EasyDiagram basedHas a figure
  6. 3 Apr 2025, Shift 2 · Q45The truth table corresponding to the circuit given below is :EasyDiagram basedHas a figure
  7. 3 Apr 2025, Shift 1 · Q45Choose the correct logic circuit for the given truth table having inputs A and B. Inputs A, B / Output Y: A=0,B=0: Y=0 A=0,B=1: Y=0…MediumDiagram basedHas a figure
  8. 2 Apr 2025, Shift 2 · Q39In the digital circuit shown in the figure, for the given inputs the P and Q values are :MediumDiagram basedHas a figure
  9. 31 Jan 2024, Shift 2 · Q48The output of the given circuit diagram is -MediumDiagram basedHas a figure
  10. 31 Jan 2024, Shift 1 · Q48Identify the logic operation performed by the given circuit.EasySingle correctHas a figure
  11. 9 Apr 2024, Shift 2 · Q48In the truth table of the above circuit the value of X and Y are :MediumSingle correctHas a figure
  12. 8 Apr 2024, Shift 1 · Q47The output Y of following circuit for given inputs is :MediumDiagram basedHas a figure
  13. 6 Apr 2024, Shift 1 · Q49The correct truth table for the following logic circuit is :EasyDiagram basedHas a figure
  14. 5 Apr 2024, Shift 2 · Q50The output (Y) of logic circuit given below is 0 only when :EasySingle correctHas a figure
  15. 5 Apr 2024, Shift 1 · Q49Following gates section is connected in a complete suitable circuit. For which of the following combination, bulb will glow (ON) :MediumDiagram basedHas a figure
  16. 4 Apr 2024, Shift 2 · Q49Identify the logic gate given in the circuit:EasyDiagram basedHas a figure
  17. 11 Apr 2023, Shift 2 · Q42The logic operations performed by the given digital circuit is equivalent to:MediumDiagram basedHas a figure
  18. 28 Jun 2022, Shift 1 · Q46In the following circuit, the correct relation between output (Y) and inputs A and B will be :MediumDiagram basedHas a figure
  19. 25 Jun 2022, Shift 2 · Q48Identify the logic operation performed by the given circuit :MediumDiagram basedHas a figure
  20. 17 Mar 2021, Shift 2 · Q15Which one of the following will be the output of the given circuit ?MediumDiagram basedHas a figure
  21. 17 Mar 2021, Shift 1 · Q17The output of the given combination gates represents :MediumDiagram basedHas a figure
  22. 16 Mar 2021, Shift 2 · Q20The following logic gate is equivalent to :MediumDiagram basedHas a figure
  23. 25 Jul 2021, Shift 1 · Q12Identify the logic operation carried out.EasyDiagram basedHas a figure
  24. 25 Feb 2021, Shift 2 · Q20The truth table for the following logic circuit is :MediumDiagram basedHas a figure
  25. 24 Feb 2021, Shift 2 · Q20The logic circuit shown above is equivalent to :MediumDiagram basedHas a figure
  26. 31 Aug 2021, Shift 1 · Q2In 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…EasyDiagram basedHas a figure
  27. 26 Aug 2021, Shift 2 · Q4Four NOR gates are connected as shown in figure. The truth table for the given figure is :MediumDiagram basedHas a figure
  28. 26 Aug 2021, Shift 1 · Q3Identify the logic operation carried out by the given circuit :EasyDiagram basedHas a figure
  29. 3 Aug 2021, Shift 2 · Q17Identify the resulting gate for the following circuit.MediumSingle correctHas a figure
  30. 2 Sep 2020, Shift 2 · Q19In 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) :MediumDiagram basedHas a figure
  31. 8 Jan 2020, Shift 1 · Q19Boolean relation at the output stage-Y for the following circuit is :MediumSingle correctHas a figure

Shifts: 8 Jan 2020, Shift 1, 2 Sep 2020, Shift 2, 24 Feb 2021, Shift 2, 25 Feb 2021, Shift 2, 16 Mar 2021, Shift 2, 17 Mar 2021, Shift 2, 17 Mar 2021, Shift 1, 25 Jul 2021, Shift 1, 3 Aug 2021, Shift 2, 26 Aug 2021, Shift 2, 26 Aug 2021, Shift 1, 31 Aug 2021, Shift 1, 25 Jun 2022, Shift 2, 28 Jun 2022, Shift 1, 11 Apr 2023, Shift 2, 31 Jan 2024, Shift 2, 31 Jan 2024, Shift 1, 4 Apr 2024, Shift 2, 5 Apr 2024, Shift 2, 5 Apr 2024, Shift 1, 6 Apr 2024, Shift 1, 8 Apr 2024, Shift 1, 9 Apr 2024, Shift 2, 2 Apr 2025, Shift 2, 3 Apr 2025, Shift 2, 3 Apr 2025, Shift 1, 7 Apr 2025, Shift 2, 2 Apr 2026, Shift 2, 4 Apr 2026, Shift 1, 5 Apr 2026, Shift 1, 6 Apr 2026, Shift 2.

Same topic

Other ideas in Logic Gates

Logic Gates has 9 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas