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
Practise Edexcel GCSE Computer Science Binary with exam-style questions for GCSE Computer Science. 100 questions 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, matched to the Edexcel GCSE Computer Science (1CP2) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.