A smart home automation controller uses an 18-bit binary address field in its communication protocol to identify individual device nodes on its local wireless network.
Determine the maximum number of unique device nodes that can be directly addressed by this controller.
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.