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Combinational Logic and Boolean Minimization - Digital Circuits - Electronics & Communication Engineering Previous Year Questions

Practice Combinational Logic and Boolean Minimization - Digital Circuits - Electronics & Communication Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

28Papers

18Years

85Questions

1Topics

Combinational Logic and Boolean Minimization question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

85questions

Medium 54 63.5%

Easy 28 32.9%

Hard 3 3.5%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

85questions

MCQ 69 81.2%

MSQ 8 9.4%

Numerical Answer Type (NAT) 7 8.2%

Fill in the blanks 1 1.2%

Subject weightage

Top subjects by unique question coverage.

Electronics & Communication Engineering

85 Qs

Most asked topics

Top topics across the included previous year papers.

Digital Circuits

85 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Combinational Logic and Boolean Minimization

85 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Electronics and Communication Engineering (EC) 2026

3 Qs

Electronics & Communication Engineering (EC) 2025

2 Qs

Electronics & Communication Engineering (EC) 2024

4 Qs

Electronics & Communication Engineering (EC) 2023

2 Qs

Electronics & Communication Engineering (EC) 2022

4 Qs

Electronics & Communication Engineering (EC) 2021

2 Qs

Electronics & Communication Engineering (EC) 2019

5 Qs

Electronics & Communication Engineering (EC) 2018

5 Qs

Electronics & Communication Engineering (EC) 2017

4 Qs

Electronics & Communication Engineering (EC) 2017 [Session 2]

4 Qs

Electronics & Communication Engineering (EC) 2017 [Session 1]

1 Qs

Electronics & Communication Engineering (EC) 2016 [Session 3]

4 Qs

Electronics & Communication Engineering (EC) 2016 [Session 1]

3 Qs

Electronics & Communication Engineering (EC) 2016 [Session 2]

3 Qs

Electronics & Communication Engineering (EC) 2014 [Session 1]

4 Qs

Electronics & Communication Engineering (EC) 2014 [Session 4]

4 Qs

Electronics & Communication Engineering (EC) 2014 [Session 2]

2 Qs

Electronics & Communication Engineering (EC) 2014 [Session 3]

2 Qs

Electronics & Communication Engineering (EC) 2013 [Session 2]

2 Qs

Electronics & Communication Engineering (EC) 2013 [Session 3]

2 Qs

Electronics & Communication Engineering (EC) 2013 [Session 4]

2 Qs

Electronics & Communication Engineering (EC) 2013 [Session 1]

1 Qs

Electronics & Communication Engineering (EC) 2012

3 Qs

Electronics & Communication Engineering (EC) 2011

2 Qs

Electronics & Communication Engineering (EC) 2010

3 Qs

Electronics & Communication Engineering (EC) 2009

5 Qs

Electronics & Communication Engineering (EC) 2008

3 Qs

Electronics & Communication Engineering (EC) 2007

4 Qs

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper name	Year	PDF
Electronics and Communication Engineering (EC) 20262026 3 questions in this view	2026	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20252025 2 questions in this view	2025	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20242024 4 questions in this view	2024	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20232023 2 questions in this view	2023	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20222022 4 questions in this view	2022	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20212021 2 questions in this view	2021	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20192019 5 questions in this view	2019	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20182018 5 questions in this view	2018	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20172017 4 questions in this view	2017	ExamElite PDFs ExamElite solutions
Electronics & Communication Engineering (EC) 2017 [Session 1]2017 1 questions in this view	2017	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2017 [Session 2]2017 4 questions in this view	2017	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2016 [Session 1]2016 3 questions in this view	2016	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2016 [Session 2]2016 3 questions in this view	2016	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2016 [Session 3]2016 4 questions in this view	2016	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2014 [Session 1]2014 4 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2014 [Session 2]2014 2 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2014 [Session 3]2014 2 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2014 [Session 4]2014 4 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2013 [Session 1]2013 1 questions in this view	2013	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2013 [Session 2]2013 2 questions in this view	2013	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2013 [Session 3]2013 2 questions in this view	2013	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2013 [Session 4]2013 2 questions in this view	2013	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20122012 3 questions in this view	2012	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20112011 2 questions in this view	2011	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20102010 3 questions in this view	2010	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20092009 5 questions in this view	2009	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20082008 3 questions in this view	2008	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20072007 4 questions in this view	2007	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download

All Combinational Logic and Boolean Minimization previous year questions

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2007 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2007

The Boolean function \(Y = AB + CD\) is to be realized using only 2-input NAND gates. The minimum number of gates required is

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2007 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2007

The Boolean expression \(Y = \overline{A} \overline{B} \overline{C} D + \overline{A} B \overline{C} D + A \overline{B} \overline{C} D + A B \overline{C} D\) can be minimized to

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2007 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2007

The circuit diagram of a standard TTL NOT gate is shown in the figure. When \(V_i = 2.5\text{ V}\), the modes of operation of the transistors will be

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2007 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2007

In the following circuit, \(X\) is given by

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2008 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2008

The logic function implemented by the following circuit at the terminal OUT is

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2008 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2008

Which of the following Boolean Expressions correctly represents the relation between P, Q, R and M₁?

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2008 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2008

For the circuit shown in the following figure, I₀-I₃ are inputs to the 4 : 1 multiplexer. R (MSB) and S are control bits.
The output Z can be represented by

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2009 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2009

The full forms of the abbreviations TTL and CMOS in reference to logic families are

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2009 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2009

If \(X = 1\) in the logic equation \(\left[X + Z\left\{\overline{Y} + \left(\overline{Z} + X\overline{Y}\right)\right\}\right]\left[\overline{X} + \overline{Z}\left(X + Y\right)\right] = 1\), then

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2009 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2009

What are the minimum number of 2-to-1 multiplexers required to generate a 2-input AND gate and a 2-input Ex-OR gate ?

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2009 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2009

If segments a to g are considered as functions of P₁ and P₂, then which of the following is correct ?

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2009 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2009

What are the minimum numbers of NOT gates and 2-input OR gates required to design the logic of the driver for this 7-segment display ?

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2010 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2010

For the output F to be 1 in the logic circuit shown, the input combination should be

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2010 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2010

In the circuit shown, the device connected to Y5 can have address in the range

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2010 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2010

The Boolean function realized by the logic circuit shown is

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2011 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2011

The logic function implemented by the circuit below is (ground implies a logic “0”)

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2011 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2011

The output Y in the circuit below is always “1” when

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2012 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2012

The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-bit input B. The number of combinations for which the output is logic 1, is

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2012 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2012

In the circuit shown

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2012 · Electronics & Communication Engineering · Digital Circuits · Combinational Logic and Boolean Minimization

Electronics & Communication Engineering (EC) 2012

In the sum of products function \( f(X, Y, Z) = \sum(2, 3, 4, 5) \), the prime implicants are

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Combinational Logic and Boolean Minimization - Digital Circuits - Electronics & Communication Engineering Previous Year Questions