Logic gates and truth tables: practice

Question 11 mark

Spec and skills

Paper scope: AQA Paper 2 · OCR Papers 1 and 2
Topic spec AQA 3.4.2
Topic spec OCR 2.4.1
Skill: gate-tables
Learning check
AQA 8525 Version 1.3, 16 June 2025 (exams from June 2027); OCR J277 Version 3.1, May 2026

When is the output of an AND gate 1?

Question 21 mark

Spec and skills

Paper scope: AQA Paper 2 · OCR Papers 1 and 2
Topic spec AQA 3.4.2
Topic spec OCR 2.4.1
Skill: gate-tables
Learning check
AQA 8525 Version 1.3, 16 June 2025 (exams from June 2027); OCR J277 Version 3.1, May 2026

An OR gate has inputs A = 0 and B = 1. What is the output?

Question 31 mark

Spec and skills

Paper scope: AQA Paper 2 · OCR Papers 1 and 2
Topic spec AQA 3.4.2
Topic spec OCR 2.4.1
Skill: gate-tables
Learning check
AQA 8525 Version 1.3, 16 June 2025 (exams from June 2027); OCR J277 Version 3.1, May 2026

A NOT gate has input 1. What is the output?

Question 41 mark

Spec and skills

Paper scope: AQA Paper 2 · OCR Papers 1 and 2
Topic spec AQA 3.4.2
Topic spec OCR 2.4.1
Skill: evaluate-expression
Learning check
AQA 8525 Version 1.3, 16 June 2025 (exams from June 2027); OCR J277 Version 3.1, May 2026

P = (A AND B) OR C. What is P when A = 1, B = 0 and C = 1?

Question 51 mark

Spec and skills

Paper scope: AQA Paper 2 · OCR Papers 1 and 2
Topic spec AQA 3.4.2
Topic spec OCR 2.4.1
Skill: evaluate-expression
Learning check
AQA 8525 Version 1.3, 16 June 2025 (exams from June 2027); OCR J277 Version 3.1, May 2026

In the truth table for P = NOT (A OR B), how many rows give P = 1?

Question 61 mark

Spec and skills

Paper scope: AQA Paper 2 · OCR Papers 1 and 2
Topic spec AQA 3.4.2
Topic spec OCR 2.4.1
Skill: truth-tables
Learning check
AQA 8525 Version 1.3, 16 June 2025 (exams from June 2027); OCR J277 Version 3.1, May 2026

How many rows does a truth table for a circuit with three inputs need?