EEC 331 Digital Electronics Exam 2026

About this paper

EEC 331: First Semester Examination for EEC331, Digital Electronics, University of Buea, Course Masters Dr ATEUAFACK and Dr MBIEDA, 05/02/2026, 2 hours. Exercise 1 (24 marks): D flip-flop naming/symbol, JK flip-flop synchronous modes, identifying toggle mode from an output pattern, tracing a JK flip-flop's Q output and mode of operation through an 8-pulse J/K waveform train, and sketching a JK flip-flop's Q output from J/K/CLK waveforms. Exercise 2 (16 marks): determining Q-bar from a clocked RS flip-flop's Q waveform, the Q output of a NAND latch from SET/CLEAR waveforms, and the Q output of a D flip-flop from D/CLK waveforms. Exercise 3 (30 marks): implementing two 4-variable Boolean functions, F=sum(1,2,6,7,9,11,12,14,15) and F=A'BD'+ACD+B'CD+A'C'D, using an 8-to-1 line multiplexer with A,B,C on the select lines and D-dependent data-input expressions derived from the truth table.