What you'll learn
The physical components of a computer.
Key ideas
- The CPU processes instructions; the ALU does calculations.
- Input (keyboard) and output (monitor) devices.
- RAM (volatile) vs ROM (non-volatile); cache; clock speed.
Exam tips
- Classify devices as input or output.
- Distinguish volatile from non-volatile memory.
Common mistakes
- Confusing RAM and ROM.
- Mislabelling input/output devices.