Cambridge IGCSE · 0478 · Paper 1 · Computer systems
Computer Science 0478/13 May/June 2021 past paper
Cambridge IGCSE Computer Science (0478) Paper 1 (Computer systems), variant 3, May/June 2021: 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
- 41
File names: 0478_s21_qp_13 · 0478_s21_ms_13
Grade thresholds for 0478/13 May/June 2021
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 | 33 | 25 | 21 | 17 | 13 | 9 |
Topics in this paper
Which syllabus chapters 0478/13 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| The Internet and its Uses | 3 | 19 |
| Data Transmission | 2 | 18 |
| Data Representation | 1 | 13 |
| Hardware | 2 | 12 |
| Boolean Logic | 1 | 7 |
| Software | 1 | 6 |
Questions in 0478/13 May/June 2021
- Question 1
Greta has a computer that she uses for schoolwork and leisure. (a) The computer has the Media Access Control (MAC) address: 00:A0:C9:14:C8:29 (i) Tick (3) to show whether the MAC address is initially assigned to the computer by the network, …
- Question 2
Jolene displays videos on her website. She uses lossy compression to reduce the file size of the videos. (a) Describe how lossy compression reduces the file size of the videos. (b) State two reasons why Jolene would use lossy rather …
- Question 3
An optical mouse is a type of input device that can be used to input data into a computer system. (a) Complete the paragraph about the operation of an optical mouse, using the most appropriate terms from the given list. …
- Question 4
Spencer finds out that his online music account has been accessed by an unauthorised person. He believes his personal details for the account were obtained using phishing. (a) Explain how the personal details could have been obtained using phishing. (b) …
- Question 5
Six statements are given about programming languages. Tick (3) to show whether each statement applies to high-level language, assembly language or machine code. Some statements may apply to more than one type of programming language. Statement High-level language (3) Assembly …
- Question 6
Four 7-bit binary values are transmitted from one computer to another. A parity bit is added to each binary value creating 8-bit binary values. All the binary values are transmitted and received correctly. (a) Identify whether each 8-bit binary value …
- Question 7
Marco uses his computer for work. The data he uses on a daily basis is valuable to his business. Marco is concerned about his data being accidentally damaged. Human error, such as incorrectly removing external storage devices, is one way …
- Question 8
Consider the following logic circuit: …
- Question 9
An underground car park has a system that checks the height of vehicles. A vehicle can be no higher than 1.8 metres to enter the car park. The system also counts the number of vehicles that have entered the car …
- Question 10
Several components are involved in processing an instruction in a Von Neumann model for a computer system. Three of these components are the arithmetic logic unit (ALU), control unit (CU) and random access memory (RAM). (a) Six statements are given …
Other Computer Science papers from May/June 2021
- 0478/11 Computer systems
- 0478/12 Computer systems
- 0478/21 Algorithms, programming & logic
- 0478/22 Algorithms, programming & logic
- 0478/23 Algorithms, programming & logic