Electronics Paper 2, Nov/Dec. 2010  
Questions: 1 2 3 4 5 6 7 8 9 10 Main
General Comments
Question 9

(a) Define the term logic gates.
(b) Draw the combinational logic circuit for the following Boolean
(i) Y == AS + AC
(ii) Y == AB + AB


The expected answers were:
(a) Logic gate
Is a circuit that has one or more input signal but only one output signal.

The question was on Digital Electronics. The question was not all that popular with the candidates. Very few candidates correctly identified the number of outputs and inputs. No candidate was reported to have refered to the logical relationship that must
exist by design between input and output.

Powered by Sidmach Technologies(Nigeria) Limited .
Copyright © 2015 The West African Examinations Council. All rights reserved.