📚 Year 8 WJEC Computer Science: Exam Technique and Marking Criteria | Year 8 WJEC 计算机：答题技巧与评分标准
Introduction: Mastering exam technique is just as important as knowing the subject content. In Year 8 WJEC Computer Science, assessments test your understanding of key computing concepts and your ability to apply them. This guide breaks down the marking criteria and shows you how to structure your answers to maximise marks.
引言：掌握答题技巧与掌握学科知识同样重要。在 Year 8 WJEC 计算机课程中，考试不仅测试你对关键计算概念的理解，还考察你应用这些概念的能力。本指南详细解析评分标准，并告诉你如何组织答案以获得最高分数。
1. Understanding the Mark Scheme | 了解评分方案
Every WJEC assessment is designed with a specific mark scheme that rewards exact points. For a one-mark question, you usually need to state one correct fact. For two marks, you might need to give a fact and an explanation, or two separate facts. Knowing how the marks are allocated helps you decide how much to write.
每项 WJEC 考试都配有详细的评分方案，奖励精准的得分点。对于一分题，你通常需要陈述一个正确事实。对于两分题，你可能需要给出一个事实并加以解释，或者两个不同的事实。了解分数如何分配，有助于你决定答案的长短。
For example, a question asking "Name an input device" (1 mark) only requires a single word like "keyboard". However, "Explain why a keyboard is an input device" (2 marks) expects you to state that it allows data to be entered into a computer and possibly that it converts key presses into signals.
例如，如果题目是“说出一种输入设备”（1 分），只需回答“键盘”即可。但如果题目是“解释为什么键盘是一种输入设备”（2 分），则需要说明它可以向计算机输入数据，并可能提到它将按键转换为信号。
Always underline the command word and the number of marks in the question. This simple habit will guide your response and prevent you from wasting time on unnecessary detail or missing easy marks.
务必在题目中圈出关键词和分数。这个简单的习惯能引导你的回答，避免浪费时间写不必要的内容或丢失容易得的分数。
2. Command Words Decoded | 指令词详解
WJEC questions use specific command words that tell you exactly what to do. "State" or "Give" means provide a short answer without explanation. "Describe" requires you to write about what something is like or what happens. "Explain" means you must give reasons, using the word "because".
WJEC 题目使用特定的指令词，明确告诉你该做什么。“State”（陈述）或“Give”（给出）意味着提供简短答案，无需解释。“Describe”（描述）要求你写出某物是什么样或发生了什么。“Explain”（解释）则意味着你必须给出原因，使用“因为”一词。
"Compare" questions ask you to identify similarities and differences, often using linking words such as "whereas". "Justify" expects you to give reasons for a choice, backing it up with evidence. Memorising these command words and practising with past questions will make you more confident.
“Compare”（比较）类问题要求你找出相似点和不同点，通常使用“而”等连接词。“Justify”（证明）则要求你对某个选择给出理由，并用证据来支撑。熟记这些指令词，并通过历年试题进行练习，会让你更自信。
3. Multiple-Choice Strategy | 选择题策略
Multiple-choice questions often appear in the theory paper. Read all the options carefully, even if the first one seems correct. Eliminate obviously wrong answers to improve your chances. Be wary of distractors – options that look right but contain a subtle mistake.
选择题经常出现在理论试卷中。即使第一个选项看似正确，也要仔细阅读所有选项。排除明显错误的答案，以提高正确率。要警惕干扰项——那些看起来正确但包含细微错误的选项。
If you are unsure, mark the question and return to it later. Sometimes later questions provide clues. Never leave a multiple-choice answer blank; there is no penalty for guessing in WJEC assessments.
如果不确定，先标记该题，稍后再回来作答。有时后面的题目会提供线索。切记不要留空选择题；在 WJEC 考试中，猜测不会倒扣分。
4. Short-answer and Structured Questions | 简答题与结构化问题
Short-answer questions are marked positively; each correct point earns a mark. Write each point on a new line or in a bullet style to make it easy for the examiner to see the marks. Use technical vocabulary — for example, say "central processing unit" instead of "brain of the computer".
简答题采用正向评分；每个正确点都能得分。将每个要点另起一行或采用项目符号形式，以便阅卷老师看清得分点。要使用专业术语——例如，用“中央处理器”而不是“电脑的大脑”。
For structured questions with several parts, note that parts (a), (b) and (c) often build on each other. If you are stuck on (a), write what you think is right and move on, because (b) and (c) may still gain marks even if (a) is incorrect, provided your reasoning follows logically from your earlier answer.
对于包含多个部分的结构化问题，注意(a)、(b)、(c)部分往往是层层递进的。如果卡在(a)部分，写出你认为正确的答案然后继续，因为即使(a)答错了，只要(b)和(c)的逻辑与前面的答案一致，仍然可能得分。
5. Programming and Algorithm Questions | 编程与算法题技巧
In Year 8, you may be asked to write short programs using Scratch or pseudocode. Marks are given for correct structure (sequence, selection, iteration), accurate syntax and logical flow. Even if you forget a small piece of code, you can still earn marks for comments or a flowchart that shows the logic.
在 Year 8，你可能会被要求使用 Scratch 或伪代码编写简短程序。评分点包括正确的结构（顺序、选择、迭代）、准确的语法和逻辑流程。即使忘记一小段代码，如果你添加了注释或流程图展示逻辑，仍然可以得分。
Always read the question to know whether you need to draw a flowchart or write code. A flowchart should use the standard symbols (oval for start/stop, parallelogram for input/output, rectangle for process, diamond for decision). Line up the symbols neatly and label them clearly.
一定要仔细读题，明确要求画流程图还是写代码。流程图应使用标准符号（椭圆表示开始/结束，平行四边形表示输入/输出，矩形表示处理，菱形表示判断）。符号要排列整齐，并清晰地标注。
When debugging your code on paper, trace the values of variables step by step in a trace table. Many marks are awarded for correct use of variables and operations. In pseudocode, use indentation to show blocks inside loops and if statements.
在纸上调试代码时，使用跟踪表逐步追踪变量的值。正确使用变量和操作往往能获得不少分数。在伪代码中，通过缩进来展示循环和条件语句中的代码块。
6. Data Representation and Binary | 数据表示与二进制
Questions on binary, denary conversion and data units are common. Show your working clearly; even if your final answer is wrong, method marks can be awarded. For example, when converting the denary number 13 to binary, write down the place values (8,4,2,1) and then put 1s and 0s.
关于二进制、十进制转换和数据单位的问题很常见。清晰展示你的解题步骤；即使最终答案错误，也可以得到方法分。例如，将十进制数 13 转换为二进制时，写下位值（8,4,2,1），然后填入 1 和 0。
Remember the units: bit, nibble, byte, kilobyte, megabyte. One byte equals 8 bits. You may be asked to calculate file sizes or data transfer times. Always write down the formula, substitute the numbers and calculate stepwise. Marks are for each correct step.
记住数据单位：比特、半字节、字节、千字节、兆字节。1 字节等于 8 比特。你可能需要计算文件大小或数据传输时间。务必写下公式，代入数字并逐步计算。每一步正确都能得分。
7. Hardware and Software Knowledge | 硬件与软件知识
Be ready to name and describe the function of common hardware components: CPU, RAM, ROM, hard disk, SSD, input and output devices. Marks are often given for using precise language: “RAM stores data and instructions currently in use” is better than “RAM is memory”.
准备说出并描述常见硬件组件的功能：CPU、RAM、ROM、硬盘、固态硬盘、输入和输出设备。使用准确的语言往往能得分：“RAM 存储当前正在使用的数据和指令”比“RAM 是内存”更好。
For software, distinguish between system software (operating system, utilities) and application software (word processor, web browser). The operating system manages hardware resources, provides a user interface and allows applications to run. These key points can be expanded for higher-mark questions.
对于软件，要区分系统软件（操作系统、实用程序）和应用软件（文字处理器、网页浏览器）。操作系统管理硬件资源、提供用户界面并允许应用程序运行。这些关键点可以在高分题目中展开。
8. Networks and the Internet | 网络与互联网
Know the difference between LAN and WAN, and the basic advantages of networking (sharing files, sharing hardware like printers, sharing internet connection). When asked to "describe" a network, mention the hardware needed: switch, router, network interface card, cables or wireless access points.
了解局域网和广域网的区别，以及网络的基本优点（共享文件、共享打印机等硬件、共享互联网连接）。当被要求“描述”一个网络时，要提到所需的硬件：交换机、路由器、网卡、网线或无线接入点。
Security questions may ask about firewalls, encryption and strong passwords. For "explain how a firewall protects a network", state that it monitors incoming and outgoing traffic and blocks unauthorised access based on rules. Always link the explanation to a "because" statement.
安全问题可能涉及防火墙、加密和强密码。对于“解释防火墙如何保护网络”，说明它监控进出流量并根据规则阻止未授权访问。将解释与“因为”语句关联起来。
9. E-safety and Digital Citizenship | 数字素养与安全
WJEC Year 8 tests often include questions on staying safe online. You should be able to identify risks such as grooming, cyberbullying and identity theft. For each risk, describe what it is and give a practical prevention method. A simple structure is "Risk X happens when… To prevent it, you should…".
WJEC Year 8 考试经常包含网络安全问题。你应该能够识别诱骗、网络欺凌和身份盗窃等风险。对于每种风险，描述它是什么并给出实用的预防方法。一个简单的结构是：“风险 X 发生在……要预防它，你应该……”。
Copyright and plagiarism also feature. Understand that copying someone else's work without permission is illegal and
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