Q1.Using the rules of Boolean algebra, simplify the following Boolean expression.
 
You must show your working.

								
(Total 4 marks)
Q2.The diagram shows a logic circuit.
 
(a)  Complete the part of the truth table for the circuit in the diagram that is shown below.
 
Inputs	 	Outputs	
A	B	C	D	E	F	G	H	
0	0	0	 	 	 	 	 	
0	0	1	 	 	 	 	 	
0	1	1	 	 	 	 	 	
1	1	1	 	 	 	 	 	
(3)
(b)  Using the diagram above, write a Boolean expression to show how the output G is calculated from the inputs A, B and C.

G =
(3)
(c)  Explain the purpose of the circuit.

(1)
(Total 7 marks)

Evil Questions from GOL sheet last year: