‹ Computer Science Essentials
Computer systems
The CPU and the fetch-execute cycle step by step, what makes a CPU fast, RAM, ROM and virtual memory, secondary storage, and system software.
Start: The CPU and the fetch-execute cycle About 7 min
Lessons
Practice and tests
By the end you can
Describe the parts of the CPU and the fetch-execute cycle Trace registers through a short program Explain clock speed, cores and cache Compare RAM, ROM, cache and virtual memory Choose secondary storage and calculate capacity and transfer times Describe what an operating system and utility software do Write 8-mark extended answers in the OCR style Helps with: GCSE (AQA, Edexcel, OCR)
Next unit: Boolean logic Previous unit: Data representation
AQA, Pearson Edexcel and OCR are registered trade marks of their owners. Brainlag Learn is independent: it is not affiliated with or endorsed by any exam board, and every question on it is original.
