National University of Computer and Emerging Sciences, Lahore Campus
Course: Digital Logic Design Course Code: EL-1005
Program: BS (Data Science) Semester: Fall 2022
Duration: 20 minutes Total Marks: 20
Paper Date: 07-October-22 Weight 5%
Section: E1 Page(s): 3
Exam: Quiz 1 Reg. No.
Q1. You have to design a digital system with 4-bit binary number as input. This system displays the total
number of 1’s present in the input.
a) Make a truth table for the circuit
b) Find the expression in the form of Min-terms
c) Reduce the expression using KMAP
d) Draw the reduced circuit of the expression in part (c)
Q2. Design a logic circuit whose output 1 is high only when a majority of inputs A, B, C and D are low
and output 2 is high when majority of the inputs A, B, C and D are high?
a) Make a truth table for the circuit
b) Find the expression in the form of Min-terms
c) Reduce the expression using KMAP
d) Draw the reduced circuit of the expression in part (c)
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