Digital Logic Design Easy Medium Difficult 2020 1. Combinational Circuit 2. Logic gates — 1. Number system 2019 1.Number System(2) 2.Boolean Expression 1.Number System 2.Minterms 1.Gates 2018 1.Logic Gates 1.Sequential Circuit 2.Number System 3.K-Map — 2017 Set-1 1.Adders 1.Number System 2.K-Map 3.Sequential Circuit — 2017 Set-2 1.Number System 2.Boolean Expression 1.Number system(3) 2.K-Maps 3.Sequential Circuit — 2016 Set-1 1.Boolean Algebra 2.Number System 1.Sequential Circuits 2.Multiplexer 3.Adders — 2016 Set-2 1.Number System 1.Ripple carry adder 2.Boolean operators — 2015 Set-1 1. Sequential Circuits 1. Truth table 1. Sequential Circuit  2. Boolean function 2015 Set-2 — 1. Sequential circuits  2. Boolean algebra 1. Adder 2015 Set-3 — 1. K – Map — 2014 Set-1 1. Boolean expression  2. Number system 1. Multiplexes — 2014 Set-2 1. Number systems 1. Self dual functions  2. Sequential circuits  3. Number of systems — 2014 Set-3 1. K- Map 1. Combinational circuit (2) 2. Boolean expression — 2013 1. Number systems  2. Boolean expression 1. Combinational circuit (2) — 2012 1. Boolean function  2. K- Map 1. Number system  2. Combinational circuits — 2011 1. Sequential circuit  2. Logic gates 1. Boolean expression 1. Sequential circuit (2) 2010 1. Boolean expression  2. Multiplexes 1. Number system  2. Logic gates 1. Sequential circuit