Creating Boolean Expressions from Logic Circuits (AQA GCSE Computer Science): Quizzes

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Creating Boolean Expressions from Logic Circuits
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What is creating Boolean expressions from logic circuits?

Writing a mathematical statement

Which direction should you trace signal flow when creating Boolean expressions?

Left to right

Why are brackets crucial in Boolean expressions?

They show which operations happen first

A OR B goes into a NOT gate, then OR with C. What is the Boolean expression?

NOT (A OR B) OR C\text{NOT } (A \text{ OR } B) \text{ OR } C

Input A goes to OR gate directly; B passes through NOT first. What is the expression?

A OR (NOT B)A \text{ OR } (\text{NOT } B)

What does (A OR B) AND C(A \text{ OR } B) \text{ AND } C mean?

Calculate A OR B, then AND with C

How are NOT gates represented on circuit diagrams?

Small circles

In the holiday example, happy if budget OK AND (pool OR USA). What is the expression?

A AND (B OR C)A \text{ AND } (B \text{ OR } C)

What method helps verify your Boolean expression is correct?

Creating a truth table

What is the first step when creating a Boolean expression from a logic circuit?

Identify all the logic gates

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