📚 Year 11 Edexcel Computer Science: High-Frequency Topics and Common Mistake Analysis | Year 11 Edexcel 计算机：高频考点与易错题分析
Preparing for the Year 11 Edexcel Computer Science exam requires more than just memorising facts—it demands a deep understanding of core concepts and the ability to avoid common traps. This article highlights the most frequently examined topics and analyses typical errors students make, helping you refine your exam technique and boost your grade.
备考 Year 11 Edexcel 计算机科学考试，仅靠死记硬背远远不够，更需要深入理解核心概念，并能够避开常见陷阱。本文梳理了最高频的考点，分析了学生常犯的错误，帮助你完善答题技巧、提升成绩。
1. Number Systems and Conversions | 数制与转换
Understanding binary and denary conversions is fundamental. You must be able to convert between binary (base 2), denary (base 10), and hexadecimal (base 16) fluently. Edexcel examinations often require you to show working clearly, especially for binary-to-denary conversion using place values (128, 64, 32, 16, 8, 4, 2, 1).
理解二进制与十进制的转换是基础。你需要熟练地在二进制（基数为2）、十进制（基数为10）和十六进制（基数为16）之间进行转换。Edexcel 考试常要求清晰地展示计算过程，尤其是使用位权（128、64、32
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