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.
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!
Practice questions for Logic Gates
An AND gate has inputs A=1 and B=0. What is the output?
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 | |