Page 7 - Home Exercise Logic Gate_050719_Jawapan

b. A student is given a merit certificate if he gets a pass in all subjects or obtains an overall average
of 60 in his annual exam.

i. Draw a logic circuit that would allow a computer to decide which students should get a merit
certificate.

[1 mark]
P= pass all subjects
A= overall average of 60
S=merit certificate

P
S
A

ii. Produce the truth table for this circuit.
[4 marks]

P A S
0 0 0
0 1 1
1 0 1
1 1 1

c. For the following circuits, find the Boolean Expression and construct the truth table.

Y

i. Boolean expression Y= (A+B)’ + (AB) [1 mark]

ii. Construct truth table.
[4 marks]

A B (A+B) (A+B)’ AB (A+B)’ + (AB)

0 0 0 1 0 1
0 1 1 0 0 0

1 0 1 0 0 0
1 1 1 0 1 1

@bm1920