Cambridge IGCSE · 0478 · Paper 1 · Computer systems
Computer Science 0478/11 Oct/Nov 2025 past paper
Cambridge IGCSE Computer Science (0478) Paper 1 (Computer systems), variant 1, Oct/Nov 2025: the question paper and its official mark scheme, 7 questions worth 75 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 7
- Marks
- 75
- Grade A from
- 41
File names: 0478_w25_qp_11 · 0478_w25_ms_11
Grade thresholds for 0478/11 Oct/Nov 2025
The minimum raw marks Cambridge set for each grade on this component (out of 75). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|
| 41 | 31 | 22 | 18 | 14 | 11 | 8 |
Topics in this paper
Which syllabus chapters 0478/11 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Data Transmission | 3 | 34 |
| Software | 2 | 25 |
| The Internet and its Uses | 1 | 11 |
| Hardware | 1 | 5 |
Questions in 0478/11 Oct/Nov 2025
- Question 1
A student has an electronic calculator. The calculator has a screen that displays the result of calculations. The calculator has 8-bit registers. (a) State the highest denary number that could be stored in a single 8-bit register. (b) Denary numbers …
- Question 2
An employee of a company sells houses. He sends images of the houses to his company. (a) The employee compresses the image files using lossy compression before sending them. Lossy compression reduces the size of the image files. Give two …
- Question 3
A student has a portable device. He uses an on-screen keyboard to write messages to his friend. (a) Explain how the text the student writes is converted to binary to be processed. (b) The device has 4 gibibytes (GiB) of …
- Question 4
A computer game development company are reviewing their current security solutions. The company wants employees to be aware of how they can identify phishing. (a) Describe the process of phishing. (b) Give two ways an employee could identify phishing. …
- Question 5
A supermarket wants to start delivering groceries to local elderly people, using robots. delivery grocery (a) Describe the characteristics of a robot. (b) Explain one benefit to the supermarket of using robots to deliver groceries to elderly customers. (c) Explain …
- Question 6
A computer with a Von Neumann architecture has a central processing unit (CPU). (a) Complete the statements about the operation of the CPU. Use the terms from the list. Not all terms will need to be used. You should only …
- Question 7
A theatre has a microphone on stage that is connected by cables to several speakers around the theatre. A person speaks into the microphone and their voice is output from the speakers. Identify the most appropriate data transmission method for …
Other Computer Science papers from Oct/Nov 2025
- 0478/12 Computer systems
- 0478/13 Computer systems
- 0478/21 Algorithms, programming & logic
- 0478/22 Algorithms, programming & logic
- 0478/23 Algorithms, programming & logic