📚 Year 7 SQA Computing Mock Exam Walkthrough | Year 7 SQA 计算机：单元测试模拟卷解析
Mock exams are a brilliant way to check what you already know and find out which topics need a little more revision. This walkthrough takes you through a typical Year 7 SQA Computing test, explaining the answers step by step so that every question becomes a learning opportunity. By the end, you will feel much more confident about sitting the real thing.
模拟考试是检验已学知识、发现薄弱环节的绝佳方式。本文带你走一遍典型的苏格兰 SQA Year 7 计算机单元测试，逐步解析每一道题目的答案，让每道题都成为一次学习机会。读完后，你会对真正的考试信心倍增。
1. Understanding the Paper Structure | 了解试卷结构
A standard Year 7 SQA Computing unit test usually lasts 45 minutes and includes three sections: multiple‑choice questions, short‑answer questions, and a practical problem‑solving task. The multiple‑choice section tests basic recall; short‑answer questions check your understanding of key terms and processes; and the final task asks you to write a simple sequence of instructions or debug a small piece of code.
一份标准的 Year 7 SQA 计算机单元测试通常时长 45 分钟，分为三个部分：选择题、简答题和一道实践问题解决任务。选择题考查基本记忆；简答题检验你对关键术语和过程的理解；而最后的大题要求你编写简单的指令序列或调试一小段代码。
2. Question 1 – What Is Hardware? | 第 1 题 – 什么是硬件？
This multiple‑choice question asked: “Which of the following is an example of hardware?” The options were: A) Windows, B) Keyboard, C) Google Chrome, D) Scratch. The correct answer is B, Keyboard, because hardware refers to the physical parts of a computer that you can touch. Windows and Chrome are software – programs that run on the hardware – and Scratch is a programming language, also software.
这道选择题问：“以下哪项是硬件的例子？”选项有：A) Windows，B) 键盘，C) Google Chrome，D) Scratch。正确答案是 B，键盘，因为硬件指的是计算机中你可以触摸到的物理部件。Windows 和 Chrome 是软件，即运行在硬件上的程序；Scratch 是一种编程语言，也属于软件。
Many students confuse hardware with software. A helpful way to remember the difference is: if you can drop it on your foot and it hurts, it’s probably hardware!
许多学生容易混淆硬件和软件。一个有用的记忆方法是：如果你能把它砸在自己脚上还会疼，那它很可能就是硬件！
3. Question 2 – Input and Output Devices | 第 2 题 – 输入与输出设备
The short‑answer question said: “Identify whether a microphone is an input or output device, and explain your answer.” A microphone is an input device because it sends sound data into the computer. Input devices let you give information to the computer; output devices show or play the results back to you.
这道简答题要求：“判断麦克风是输入设备还是输出设备，并解释你的答案。”麦克风是输入设备，因为它把声音数据送入计算机。输入设备让你向计算机提供信息；输出设备则把结果展示或播放给你。
You could earn a full mark by writing: “A microphone is an input device because it converts sound into electrical signals that the computer can process.” Knowing the direction of data flow – from you to the computer, or from the computer to you – is the key to this topic.
要拿到满分，你可以这样写：“麦克风是输入设备，因为它将声音转换为计算机可处理的电信号。”掌握数据流动的方向——从你到计算机，还是从计算机到你——是这一知识点的关键。
4. Question 3 – Storage Units and File Sizes | 第 3 题 – 存储单位与文件大小
One common question asks you to order file sizes from smallest to largest: KB, MB, GB, Byte, TB. The correct order is: Byte, KB (kilobyte), MB (megabyte), GB (gigabyte), TB (terabyte). A single Byte can store one character, like the letter 'A'. There are roughly 1000 Bytes in a Kilobyte, 1000 KB in a Megabyte, and so on.
一道常见题目要求你将文件大小从小到大排序：KB, MB, GB, Byte, TB。正确顺序是：Byte, KB（千字节）, MB（兆字节）, GB（吉字节）, TB（太字节）。一个字节可以存储一个字符，比如字母 'A'。大约 1000 个字节等于 1 KB，1000 KB 等于 1 MB，以此类推。
A typical exam trick is to mix up abbreviations, so be careful: 'b' usually means bit (a tiny piece of data), while 'B' means Byte. In this test, always assume capital‑B Byte unless told otherwise.
考试中常设的陷阱是混淆缩写，所以要当心：小写 'b' 通常表示比特（极小数据单位），而大写 'B' 表示字节。在本测试中，除非特别说明，否则都按大写 B 即字节来理解。
5. Question 4 – Binary Basics | 第 4 题 – 二进制基础
The exam might show a table with headings '8', '4', '2', '1' you add up the headings that have a 1 underneath: 4 + 1 = 5. So binary 0101 equals denary 5.
试卷上可能会有一张表格，表头为 '8', '4', '2', '1'，要求你将二进制数 0101 转换为十进制。你把每个数字放在对应的表头下：0 放在 8 下面，1 放在 4 下面，0 放在 2 下面，1 放在 1 下面。然后把下方为 1 的表头值加起来：4 + 1 = 5。因此二进制 0101 等于十进制 5。
Always double‑check your place columns – it’s very easy to misalign a digit, especially in a timed test. Drawing a quick four‑column grid on your scrap paper can save you from careless mistakes.
一定要再三检查你的位值栏——尤其在限时考试中，数字非常容易对错位。在草稿纸上画一个快速的四列网格就能帮你避免粗心错误。
6. Question 5 – Software Types: System vs Application | 第 5 题 – 软件类型：系统软件与应用软件
You might see a question like: “Name one piece of system software and explain its purpose.” System software controls the computer’s hardware and allows application software to run. The most common answer is the operating system, such as Windows, macOS, or Linux. Its purpose is to manage files, memory, and processes, and provide a user interface.
你可能会遇到类似这样的问题：“举出一种系统软件，并说明它的用途。”系统软件控制计算机硬件，并让应用软件能够运行。最常见的答案是操作系统，例如 Windows、macOS 或 Linux。它的用途是管理文件、内存和进程，并提供用户界面。
In contrast, application software lets users perform specific tasks – like writing a document (Word) or browsing the web (Chrome). The exam often asks you to distinguish between the two, so remember: system software runs the computer, application software runs on the computer.
相比之下，应用软件允许用户执行特定任务，例如写文档（Word）或浏览网页（Chrome）。考试常要求区分两者，所以请记住：系统软件管理计算机，应用软件运行在计算机上。
7. Question 6 – Staying Safe Online: Phishing and Passwords | 第 6 题 – 安全上网：网络钓鱼与密码安全
A scenario‑based question may describe an email that looks like it comes from your school, asking you to click a link and enter your password. The task asks: “What type of online threat is this, and what should you do?” This is a phishing attack. Phishing tries to trick you into giving away personal information, often by pretending to be someone you trust.
一道情景题可能会描述一封看起来来自学校的电子邮件，让你点击链接并输入密码。题目问：“这是哪种类型的网络威胁？你应该怎么做？”这是网络钓鱼攻击。网络钓鱼试图引诱你交出个人信息，通常是通过冒充你信任的人。
A strong answer would say: never click suspicious links, check the sender’s email address carefully, and report the email to a teacher or parent. Also, always use strong passwords – a mix of letters, numbers, and symbols – and never share them.
一个出色的答案会写：绝不点击可疑链接，仔细检查发件人的电子邮件地址，并向老师或家长报告该邮件。此外，始终使用强密码——混合字母、数字和符号的组合——并且永远不要分享密码。
8. Question 7 – Simple Programming Logic (Scratch‑style Block) | 第 7 题 – 简单编程逻辑（Scratch 风格积木）
In the problem‑solving section, you might see a short Scratch script where a sprite says “Hello” if the user’s answer equals “Yes”, otherwise it says “Goodbye”. The question asks: “Explain what this block does in your own words.” The script checks a condition: if the condition is true, it runs the first set of blocks; if false, it runs the second set.
在问题解决部分，你可能会看到一段简短的 Scratch 脚本：如果用户的回答等于 "Yes"，角色就说 "Hello"，否则就说 "Goodbye"。题目要求：“用自己的话解释这段积木的功能。”这段脚本检查一个条件：如果条件为真，就执行第一组积木；如果为假，就执行第二组积木。
This is an “if‑else” block – a core concept in programming called selection. You can get full marks by identifying the condition (answer equals “Yes”), the outcome when true (say “Hello”), and the outcome when false (say “Goodbye”).
这是一个“如果‑否则”积木——编程中的核心概念，称为选择结构。要拿满分，你需要指出条件（回答等于 "Yes"）、条件为真时的结果（说 "Hello"）以及条件为假时的结果（说 "Goodbye"）。
9. Question 8 – Debugging a Sequence Error | 第 8 题 – 调试顺序错误
The test gives a set of instructions meant to draw a square: move 100 steps, turn right 90°, move 100 steps, turn right 90°, move 100 steps, turn right 90°, move 100 steps. The drawing only shows three sides. The student must identify the missing instruction: a final “move 100 steps” after the last turn? Actually, the sequence is correct for a square – but maybe the last move was missing. The correct debug would be to add the missing “move 100 steps” before the final turn, or to check that all four sides are drawn. Often, the error is a missing step or an extra turn.
测试给出一组绘制正方形的指令：移动 100 步，右转 90°，移动 100 步，右转 90°，移动 100 步，右转 90°，移动 100 步。但绘图只显示了三条边。学生必须找出缺失的指令：最后一次转弯后是否缺少最后的“移动 100 步”？实际上，该序列对于正方形是正确的——但可能少了一次移动。正确的调试方法是补充缺失的“移动 100 步”，或者检查是否绘制了所有四条边。通常情况下，错误就是遗漏了一步，或者多了一次转弯。
Debugging is a vital skill – it means finding and fixing mistakes in a program. Always read the code carefully, and act out the sequence on paper if you’re stuck. Matching each move to a drawn side helps spot the gap.
调试是一项关键技能——它意味着找出并修复程序中的错误。务必仔细阅读代码，如果卡住了，就在纸上模拟执行序列。将每一步移动与绘制的边对应起来，有助于发现缺口。
10. Question 9 – Data Representation: Boolean and Simple Queries | 第 9 题 – 数据表示：布尔值与简单查询
ou might be given a small database table of pupils and their favourite sports, then asked: “Write a query to find all pupils who like football AND are in Year 7.” Boolean logic, AND means both must be true. The answer could be written in plain English: “Select pupils where sport = 'football' AND year = 7.”
试卷可能会给出一个关于学生及其喜爱运动的小型数据库表格，然后问：“编写一个查询，找出所有既喜欢足球又属于 Year 7 的学生。”这组合了两个条件。在布尔逻辑中，AND 意味着两者都必须为真。你可以用简单的英语写答案：“选取运动 = 'football' 且年级 = 7 的学生。”
Boolean operators (AND, OR, NOT) are used in search engines and databases to narrow results. The exam checks whether you understand how to apply them to real‑life data. Using AND makes a query more specific; using OR broadens it.
布尔运算符（AND、OR、NOT）在搜索引擎和数据库中用于缩小结果范围。考试考查你是否理解如何将它们应用于现实数据。使用 AND 能让查询更具体；使用 OR 则扩大范围。
11. Time Management and Checking Your Work | 时间管理与检查作业
Many students lose marks simply because they rush or leave questions blank. A useful strategy is: spend the first 10 minutes on multiple‑choice, 20 minutes on short‑answer, and the last 15 minutes on the programming task. If you get stuck on a question, put a star next to it and come back later – never spend 10 minutes on one 2‑mark question.
许多学生仅仅因为匆忙答题或留空题目而丢分。一个有用的策略是：花前 10 分钟做选择题，20 分钟做简答题，最后 15 分钟完成编程任务。如果在某道题上卡住了，就在旁边打个星号，稍后再回来——绝不要在一道 2 分题目上花 10 分钟。
In the last 5 minutes, re‑read your answers, especially the short‑answer ones. Check for silly mistakes like calling a speaker an input device, or writing “1024” instead of “1024 MB”. These tiny fixes can turn a grade B into an A.
在最后 5 分钟，重新阅读你的答案，尤其是简答题。检查有没有愚蠢的错误，比如把扬声器说成输入设备，或者把“1024 MB”写成“1024”。这些微小的修正可能让成绩从 B 提升到 A。
12. Final Tips from the Examiner | 阅卷老师给你的最后建议
Use the correct technical vocabulary – words like “binary”, “algorithm”, “debug”, and “input” show the examiner that you really understand the subject. Never leave a question blank; even a partial answer can earn a mark. And remember, the practical programming question is usually worth the most points, so give it your best effort.
使用正确的术语——像“二进制”、“算法”、“调试”和“输入”这样的词汇，能让阅卷老师知道你真正理解了这门学科。永远不要留空任何一道题；哪怕只是部分回答也有可能拿分。还要记住，实践编程题通常分值最高，所以一定要全力以赴。
When you sit down to the real test, take a deep breath, read each question twice, and trust the work you’ve put in. You’ve got this!
当你坐到真正的考场时，深呼吸，每道题读两遍，相信自己的付出。你一定能行！
Published by TutorHao | Computing Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图