3.4 Computer SystemsIntroduction

The Decision Makers Inside Computers

Part of Logic Gates · GCSE GCSE Computer Science revision

This introduction covers The Decision Makers Inside Computers within Logic Gates for GCSE Computer Science. Revise Logic Gates in 3.4 Computer Systems for GCSE Computer Science with 16 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 9 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 1 of 9

Practice

16 questions

Recall

20 flashcards

The Decision Makers Inside Computers

Logic gates are the tiny decision-makers inside every computer chip. They're like automatic doors with rules: AND gates only open when BOTH sensors are triggered. OR gates open when either sensor is triggered. NOT gates do the opposite - triggered means closed. These simple rules, combined by the billions, let computers make every calculation and decision. Your CPU contains billions of these gates working together!

Keep building this topic

Read this section alongside the surrounding pages in Logic Gates. That gives you the full topic sequence instead of a single isolated revision point.

Logic Gates Reference Deep Dive: The Three Basic Logic Gates The Three Basic Gates

Practice Questions for Logic Gates

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

A. 0
B. 1
C. Always 1
D. Always 0

1 markfoundation

Complete the truth table for an OR gate with two inputs A and B. | A | B | Output | |---|---|--------| | 0 | 0 | | | 0 | 1 | | | 1 | 0 | | | 1 | 1 | |

3 marksstandard

Quick Recall Flashcards

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