Hardware
The CPU and its registers, the fetch-decode-execute cycle, memory, storage and embedded systems, the topic where naming the register in the right order is the mark.
What this lesson covers
Hardware is a 7-part O Level Computer Science lesson. Each part makes one point and then hands over to the next, so it can be read in a sitting or picked up again at the part you stopped on. It defines the idea in plain words before using it, works through an example step by step, breaks the topic into its parts and compares them, names the mistakes that cost marks in an exam, ends with a recap of what to remember.
How it begins
The CPU processes instructions. Its parts: the ALU performs arithmetic and logical operations; the control unit coordinates and sequences everything; registers are tiny, extremely fast storage locations inside the processor.
The 7 parts
- Inside the CPU
- The fetch-decode-execute cycle
- Memory and storage, three distinct things
- Performance, input, output and embedded systems
- Where marks go
- What to remember
- Watch one worked through
Practise Hardware
Everything on QuizByt for O Level Computer Science that goes with this lesson: read it first, then test yourself while it is fresh.
🧠 5 quizzes on Hardware (2 easy, 2 medium, 1 hard)
Work up from easy to hard: the hard quiz asks the O Level exam-style questions on Hardware.
🖨️ Printable worksheet
Hardware on paper for O Level, with room to write the working out. Preview the first page free.
🎮 Games for O Level Computer Science
Memory and reasoning games at the right level for O Level. Passing a quiz on Hardware earns the credits that open them.
This topic needs a subscription
This lesson is part of a paid plan. Create a free account to start with our free lessons, or subscribe to open every topic.
- 🆓 Free lessons are open on any account
- 📗 Monthly: 5 paid topics a month
- 📘 Yearly: 7 paid topics a month
- ⭐ Premium, every topic, unlimited
- 🧺 Or buy this single topic, the lesson is included