Attempting to write persistent or duplicated values in trace tables where empty cells are expected.

Only write values in a column when the variable actually changes value. Keep rows blank if variables are not updated.

Using high-level built-in collection methods (e.g. .pop(), .insert(), .remove() in Python) to delete/insert elements in arrays.

Manually shift array elements inside a fixed-size array structure using loops as requested in the program skeleton guidelines.

Subtracting binary numbers directly in binary or converting via decimal representation without showing binary two's complement conversion.

Convert the subtrahend into a two's complement bit pattern first, then show the carry-based binary addition clearly.

Forgetting to update index 0 of the program data array (the tracked list length) after executing line deletions or insertions.

Always decrement or increment the integer representing the count in the first cell of the parallel/source code data structure when structure size changes.

Believing that hexadecimal formats use less physical storage space in computer systems memory.

Hexadecimal is strictly an abstraction tool for humans to read and write binary representations easily; the data occupies identical memory space.

Omitting the carry row bits during binary addition steps on Paper 2.

Draw a clear carry row just below your operands to show carry bits that carry over to consecutive columns.

Assuming that a physical star network topology acts as a logical star topology by default.

Note that while devices physically wire to a central point, if that central device is a hub rather than a switch, it transmits packets to all nodes logically.

AQA AS-Level · 考试技巧

Computer Science 7516 考试技巧

Aggregated exam tips, time management strategies, and common pitfalls for AQA AS Level Computer Science 7516, detailing the specific patterns and practical traps from recent exam series.

阅读时间 4 分钟更新于: 2026年6月21日

试卷概览

卷数

总分

150

考试时间

3小时 15分钟

题型

试卷	时间	分数	题数	比重	题型
Paper 1: On-Screen Practical Programming	1小时 45分钟	75	18	50%	Algorithm Tracing, Conceptual Short-Answer, Direct Coding Implementation, Identifier Identification, Explain Code Subroutines, Object Composition & OOP, Design Outline, Program Modification (Standard), Program Modification (Complex Parameter-passing), Subroutine Authoring and Integration
Paper 2: Written Theory	1小时 30分钟	75	31	50%	選擇題 & Basic Representations, Binary Arithmetic & Conversions, Quantitative Hardware/Sound Calculations, Logic Circuit and Boolean Algebra, Processor & Stored Program Concepts, Assembly Language Program Writing, External Storage & Reading Technologies, Structured Evaluation Essay, Network Architecture & Protocols

评级

ABCDEU

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: Recall, describe and explain common computer science concepts and principles. (35%)
AO2: Apply computer science knowledge and understanding to solve practical and theoretical problems. (35%)
AO3: Design, write, test and evaluate computer programs. (30%)

根据历届试题与评分标准整理（2022–2024）。

计算器程序

Graph: zeros, intersections & turning points

Graphical calculator / GDC (exam mode)

用途: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.

使用时机: Checking solutions, sketching, or solving where an analytic method is hard.

步骤

Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.

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.

Numerical equation solver

Graphical calculator / GDC (exam mode)

用途: Solve an equation or find a variable numerically when an algebraic route is long or implicit.

使用时机: Iterative or implicit equations, or to confirm an algebraic solution.

步骤

Use the equation/zero solver, entering the equation and a sensible starting estimate.

Numerical integration & differentiation

Graphical calculator / GDC (exam mode)

用途: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.

使用时机: Checking calculus answers, or where only a numerical value is needed.

步骤

Use the GDC's numeric integral / derivative function with the limits or the point.

Statistics & probability distributions

Graphical calculator / GDC (exam mode)

用途: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.

使用时机: Statistics questions and hypothesis tests.

步骤

Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).

常见错误

1high涉及分数: 5Programming (Fundamentals of programming)
Attempting to write persistent or duplicated values in trace tables where empty cells are expected.
如何避免: Only write values in a column when the variable actually changes value. Keep rows blank if variables are not updated.
2high涉及分数: 12Data structures and abstract data types
Using high-level built-in collection methods (e.g. .pop(), .insert(), .remove() in Python) to delete/insert elements in arrays.
如何避免: Manually shift array elements inside a fixed-size array structure using loops as requested in the program skeleton guidelines.
3high涉及分数: 2Binary number system
Subtracting binary numbers directly in binary or converting via decimal representation without showing binary two's complement conversion.
如何避免: Convert the subtrahend into a two's complement bit pattern first, then show the carry-based binary addition clearly.
4high涉及分数: 4Programming (Fundamentals of programming)
Forgetting to update index 0 of the program data array (the tracked list length) after executing line deletions or insertions.
如何避免: Always decrement or increment the integer representing the count in the first cell of the parallel/source code data structure when structure size changes.
5medium涉及分数: 1Number bases
Believing that hexadecimal formats use less physical storage space in computer systems memory.
如何避免: Hexadecimal is strictly an abstraction tool for humans to read and write binary representations easily; the data occupies identical memory space.
6high涉及分数: 1Binary number system
Omitting the carry row bits during binary addition steps on Paper 2.
如何避免: Draw a clear carry row just below your operands to show carry bits that carry over to consecutive columns.
7medium涉及分数: 2Networking
Assuming that a physical star network topology acts as a logical star topology by default.
如何避免: Note that while devices physically wire to a central point, if that central device is a hub rather than a switch, it transmits packets to all nodes logically.

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