Boolean Logic Exam Practice

This lesson brings together everything you have learned about Boolean logic and provides exam-style practice. It covers the key skills tested in GCSE Computer Science exams (AQA specification 3.3.2 and OCR specification 1.4.2): truth tables, Boolean expressions, logic circuits and simplification.

---

What the Exam Expects

In your GCSE Computer Science exam, Boolean logic questions typically ask you to:

1. Complete truth tables for given logic gates, expressions or circuits.
2. Write Boolean expressions from truth tables or logic circuits.
3. Draw logic circuits from Boolean expressions.
4. Trace values through a multi-gate circuit for given inputs.
5. Identify logic gates from their truth tables or symbols.
6. Simplify Boolean expressions using Boolean algebra laws.

Questions are usually worth 2–6 marks. Truth table questions often ask you to complete 4 or 8 rows. Expression and circuit questions may ask you to show a step-by-step process.

---

Quick-Reference: All Six Gates