Cambridge A Level · 9618 · Paper 1 · Theory fundamentals
Computer Science 9618/11 Oct/Nov 2025 past paper
Cambridge A Level Computer Science (9618) Paper 1 (Theory fundamentals), variant 1, Oct/Nov 2025: the question paper and its official mark scheme, 10 questions worth 75 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 10
- Marks
- 75
- Grade A from
- 49
File names: 9618_w25_qp_11 · 9618_w25_ms_11
Grade thresholds for 9618/11 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 |
|---|---|---|---|---|
| 49 | 41 | 33 | 26 | 18 |
Topics in this paper
Which syllabus chapters 9618/11 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Communication | 1 | 14 |
| Databases | 1 | 13 |
| Hardware | 3 | 11 |
| Processor Fundamentals | 2 | 11 |
| System Software | 1 | 10 |
| Security, privacy and data integrity | 1 | 9 |
| Information representation | 1 | 7 |
Questions in 9618/11 Oct/Nov 2025
- Question 1
(a) (i) Convert the binary number into hexadecimal. 101100111010 (ii) Convert the denary number into Binary Coded Decimal (BCD). 108 (iii) Convert the 12-bit two’s complement binary integer into denary. Show your working. 111110111100 Working Denary value (b) (i) The …
- Question 2
A relational database, WORKEXPERIENCE, stores data about students and the companies where they complete work experience. Students can complete multiple work experience placements but can only complete one placement at a time. Students can complete more than one placement at …
- Question 3
(a) Draw a logic circuit for the logic expression: X = NOT ((A NAND B) XOR (NOT A OR NOT …
- Question 4
The table shows part of the instruction set for a processor. The processor has one register, the Accumulator (ACC). Instruction Explanation Opcode Operand AND #n / Bn / &n Bitwise AND operation of the contents of the ACC with the …
- Question 5
The Operating System (OS) is responsible for hardware and security management in a computer system. (a) (i) State two tasks that are performed by hardware management. 1 2 (ii) State two tasks that are performed by security management. …
- Question 6
(a) The processor uses several registers, including the Accumulator (ACC) and the Current Instruction Register (CIR). Complete the table by describing the role of each register. Register Role ACC CIR (b) Increasing the number of cores in a processor can …
- Question 7
Web browsers use Internet Protocol (IP) addresses. (a) Complete the table by describing the following types of IP address. Type of IP address Description Static Public (b) Consider the following IP address: 256.0.0.A Circle whether this IP address is IPv4, …
- Question 8
One ethical consideration for a student connecting their personal computer to the school network is the risk of spreading malware on the network. (a) Viruses and pharming are examples of malware. Explain what is meant by a virus and pharming. …
- Question 9
Describe the differences between a monitoring system and a control system.
- Question 10
An architect needs a model of a building. (a) Explain how the model will be printed using a 3D printer. (b) State why a 3D printer needs a buffer.
Other Computer Science papers from Oct/Nov 2025
- 9618/12 Theory fundamentals
- 9618/13 Theory fundamentals
- 9618/21 Problem-solving & programming
- 9618/22 Problem-solving & programming
- 9618/23 Problem-solving & programming
- 9618/31 Advanced theory
- 9618/32 Advanced theory
- 9618/33 Advanced theory
- 9618/41 Practical programming
- 9618/42 Practical programming
- 9618/43 Practical programming