A central processing unit (CPU) is built from millions of tiny electronic switches called transistors.
Explain why this physical architecture means that computers must process and store data in a binary format.
117 exam-style questions on Edexcel GCSE Computer Science Binary, covering Binary representation and number of states, Unsigned and two's complement integers, Converting denary and 8-bit binary, Binary addition and binary shifts, Concept of overflow, and Hexadecimal notation and conversion. Each one has a worked solution and a mark scheme showing where the marks go.