A specialized telemetry unit on a weather satellite uses a 9-bit register to encode the operational mode of its environmental sensors. Each distinct bit pattern corresponds to a unique system state. What is the maximum number of unique operational states that can be represented by this register?
181818
512512512
102410241024
818181
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.