An expert-led exam preparation guide for the Pearson Edexcel IGCSE ICT (4IT1) qualification, focusing on common practical pitfalls, structured written question techniques, and calculator conversion math for the storage units.
阅读时间 4 分钟更新于: 2026年6月21日
试卷概览
卷数
2
总分
200
考试时间
4小时 30分钟
题型
5
试卷
时间
分数
题数
比重
题型
Paper 1: Theory
1小时 30分钟
100
5
50%
選擇題, Short Answer / Theory, Extended Written Discussion, Matching & Drawing
Paper 2: Practical
3小时
100
7
50%
Practical Execution
评级
987654321
计算器规定
A scientific or graphical calculator is permitted. Graphical calculators must be in exam mode with all stored programs and data cleared before the exam; the calculator must not be able to retrieve stored text or formulae.
AO1: Recall, select and communicate knowledge and understanding of ICT (35%)
AO2: Apply knowledge, understanding and skills to produce ICT-based solutions (45%)
AO3: Analyse, evaluate, make reasoned judgements and present conclusions (20%)
根据历届试题与评分标准整理（2023–2025）。
计算器程序
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用时机: Solving or sketching a function when you want to find where its graph crosses or turns.
步骤
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用时机: Any data-handling, statistics, or required-practical analysis question.
步骤
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用时机: Multi-step calculations where premature rounding loses the final accuracy mark.
步骤
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用时机: As a check only, after solving by hand.
步骤
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
常见错误
1high涉及分数: 2Connectivity
Confusing network content filters with firewalls, leading to irrelevant security-focused answers.
如何避免: Define firewalls as security barriers preventing unauthorized access, whereas network filters restrict specific web content, keywords, or website categories.
2high涉及分数: 4Practical Databases
Leaving data fields or column headers truncated (cut off) in database reports and spreadsheets.
如何避免: Adjust column widths in design view or layout view before taking screenshots or printing to ensure all text is fully visible.
3high涉及分数: 3Practical Spreadsheets
Failing to use absolute referencing ($) in spreadsheet lookup and calculation formulas during replication.
如何避免: Use the $ symbol to lock cell coordinates (e.g., $B$19) before dragging/copying formulas down columns.
4medium涉及分数: 2Digital Devices
Stating brand names of utility software (e.g., McAfee, Norton) instead of generic technical classifications.
如何避免: Always use generic software terms like 'anti-virus', 'anti-spyware', or 'defragmentation utility' in written explanations.
5medium涉及分数: 3Digital Devices
Using a decimal conversion factor of 1000 instead of the binary 1024 in computer storage conversions.
如何避免: Always use exactly 1024 when converting between KiB, MiB, GiB, and TiB (e.g., 1024^3 for GiB to bits conversion expressions).
6high涉及分数: 10The Impact of ICT
Failing to expand 2-mark 'Explain' questions, giving only a single point without a linked expansion.
如何避免: Write answers in two linked parts: state your point first, then describe its consequence or detailed technical mechanism.
7medium涉及分数: 2Practical Web Authoring
Omitting the mandatory 'mailto:' prefix syntax when creating required email links on web authoring pages.
如何避免: Write HTML links using the correct syntax: Send email.
8high涉及分数: 4The Impact of ICT
Failing to structure a balanced argument and a contextual conclusion in the 8-mark Discuss essays.
如何避免: Organize your essay with two paragraphs showing opposing viewpoints, followed by a final paragraph containing a reasoned concluding judgment.