Master the Pearson Edexcel GCSE (9-1) Computer Science (1CP2) exam with this examiner-backed guide. Learn time-saving strategies, expression-building techniques for Paper 1, practical Python tips to avoid automated runner failures in Paper 2, and crucial flowchart standards.
阅读时间 5 分钟更新于: 2026年6月21日
试卷概览
卷数
2
总分
150
考试时间
3小时 30分钟
题型
5
试卷
时间
分数
题数
比重
题型
Written Paper (Theoretical)
1小时 30分钟
75
32
50%
選擇題, Short Answer & Formula Construction, Extended Response, Flowchart / Diagram Construction
Workstation Practical On-Screen Paper
2小时
75
6
50%
Code Correction (Debugging), Code Selection (Caesar Cipher), Logic and Sequence Completion, Algorithmic Translation (Flowchart to Code), Modular Subprograms & Arrays, File I/O and Record Tables
评级
987654321U
计算器规定
A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.
AO1: Demonstrate knowledge and understanding of key concepts and principles of computer science (40%)
AO2: Apply knowledge and understanding of key concepts and principles of computer science to some contexts (40%)
AO3: Analyse, evaluate, make judgements, design, program and evaluate computer systems (20%)
根据历届试题与评分标准整理（2022–2024）。
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 under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
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 under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
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 under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
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 under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
常见错误
1high涉及分数: 2Algorithms
Failure to label 'Yes' and 'No' (or 'True' and 'False') branches on decision diamonds in flowcharts.
如何避免: Always write clear, legible labels on all outgoing pathways originating from every decision diamond.
2high涉及分数: 1Data types and structures
Forgetting to cast inputs to the correct numeric types (such as float or int) prior to calculations in Python.
如何避免: Wrap your input() calls with int() or float() immediately, e.g. weight = float(input("Weight: ")), to prevent runtime errors.
3medium涉及分数: 1Develop code
Hard-coding constants inside calculations rather than using the pre-declared CONSTANTS in Paper 2.
如何避免: Look at the top of the code file for pre-declared variables (in UPPERCASE) and use them directly in your equations (e.g. MIN_CHEESE, PRICE_PER_KILOGRAM).
4medium涉及分数: 2Subprograms
Referencing global lists or variables instead of the local parameter (such as pTable) inside Paper 2 subprograms.
如何避免: Ensure all operations within your functions target the variables supplied in the subprogram arguments list (e.g., pTable) to secure modularity marks.
5medium涉及分数: 1Input/output
Forgetting to strip trailing newline characters (\n) when reading lines from raw data text files.
如何避免: Use the .strip() function on lines read from files prior to splitting or printing, to avoid formatting and indexing errors.
6medium涉及分数: 1Operators
Confusing floor division (//) with modulus (%) or standard division (/) in arithmetic expressions.
如何避免: Use standard division (/) for real division, floor division (//) for integer quotients, and modulus (%) for remainders.
7medium涉及分数: 1Networks
Defining LAN and WAN differences solely by geographic scale rather than specifying infrastructure ownership.
如何避免: State clearly that LANs use self-owned network infrastructure, while WANs rely on third-party telecommunications infrastructure.