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Digital Electronics and Logic Gates for NEET: 31 solved questions

Real NEET paper questions on digital electronics and logic gates, part of semiconductor electronics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 1991 to 2025. No sign-in needed to read them.

What this topic asks

• Gate combinations and truth tables — 24 questions
• Waveforms, switches and diode gates — 6 questions
• Integrated circuits — 1 question

All 31 questions with solutions

• The output (Y) of the given logic implementation is similar to the output of an/a NEET 2025
• When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a NEET 2024 (Re-exam)
• The output Y for the inputs A and B of the given logic circuit is: NEET 2024 (Re-exam)
• A logic circuit provides the output Y as per the following truth table: A - B - Y; 0 - 0 - 1; 0 - 1 - 0; 1 -… NEET 2024
• The output (Y) of the given logic gate is similar to the output of an/a NEET 2024
• For the following logic circuit, the truth table is NEET 2023
• The given circuit is equivalent to: NEET 2023 (mpr)
• Identify the equivalent logic gate represented by the given circuit. An open switch is 0 and a closed switch… NEET 2022 (Re-exam)
• The truth table for the given logic circuit is NEET 2022
• For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the o… NEET 2021
• For the logic circuit shown, the truth table is NEET 2020
• The correct Boolean operation represented by the circuit diagram drawn is NEET 2019
• In the combination of the following gates the output Y can be written in terms of the inputs A and B as NEET 2018
• The given electrical network is equivalent to NEET 2017
• To get output 1 for the following circuit, the correct choice for the input is NEET 2016 (Phase I)
• What is the output Y in the following circuit, when all the three inputs A, B, C are first 0 and then 1? NEET 2016 (Phase II)
• Which logic gate is represented by the following combination of logic gates? NEET 2015
• The output of a NAND gate is divided into two in parallel and fed to another NAND gate. The resulting gate is… NEET Karnataka 2013
• The figure shows a logic circuit with two inputs A and B and an output C, together with the voltage waveforms… NEET 2012
• To get an output Y=1 from the circuit shown, which one of the following sets of inputs will be correct? NEET 2012 Mains
• The symbolic representations of four logic gates are shown as (i), (ii), (iii) and (iv) in the figure. Pick o… NEET 2011
• The device that can act as a complete electronic circuit is NEET 2010
• To get an output Y=1 from the circuit shown, the input must be NEET 2010
• The figure shows a logic gate circuit with two inputs A and B and an output Y, together with the voltage wave… NEET 2010 Mains
• The combination of gates shown in the figure produces AIPMT 2008
• For the circuit shown, which of the following is the correct truth table? AIPMT 2007
• The figure shows a block with two inputs A and B and an output C, together with the voltage waveforms at all… AIPMT 2006
• The output of OR gate is 1 CBSE AIPMT 2004
• The given truth table is for which logic gate? A - B - Y; 1 - 1 - 0; 0 - 1 - 1; 1 - 0 - 1; 0 - 0 - 1 CBSE AIPMT 2002; CBSE AIPMT 1997
• The symbol shown, with inputs A and B and output Y, represents AIPMT 1996
• The following truth table corresponds to the logical gate A - B - Y; 0 - 0 - 0; 0 - 1 - 1; 1 - 0 - 1; 1 - 1 -… CBSE AIPMT 1991