A logic control circuit is designed to manage a safety valve in a chemical plant. The circuit diagram is shown below:

Which of the following represents the simplified Boolean expression for the output YYY?
A‾+B‾\overline{A} + \overline{B}A+B
B‾⋅C‾\overline{B} \cdot \overline{C}B⋅C
A‾+B‾+C‾\overline{A} + \overline{B} + \overline{C}A+B+C
A⋅B⋅C‾\overline{A \cdot B \cdot C}A⋅B⋅C
Practise AQA GCSE Computer Science Boolean logic with exam-style questions for GCSE Computer Science. 83 questions, matched to the AQA GCSE Computer Science (8525) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.