Cambridge IGCSE · 0478 · Paper 1 · Computer systems
Computer Science 0478/13 Oct/Nov 2021 past paper
Cambridge IGCSE Computer Science (0478) Paper 1 (Computer systems), variant 3, Oct/Nov 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
- 45
File names: 0478_w21_qp_13 · 0478_w21_ms_13
Grade thresholds for 0478/13 Oct/Nov 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 |
|---|---|---|---|---|---|---|
| 45 | 37 | 29 | 23 | 18 | 13 | 8 |
Topics in this paper
Which syllabus chapters 0478/13 Oct/Nov 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Software | 2 | 27 |
| Data Transmission | 3 | 15 |
| Boolean Logic | 1 | 10 |
| Hardware | 2 | 8 |
| The Internet and its Uses | 1 | 8 |
| Data Representation | 1 | 7 |
Questions in 0478/13 Oct/Nov 2021
- Question 1
(a) Xia has three files stored on her computer. Tick (3) one box to show which is the largest file size. File size Tick (✔) 999 kB 1 MB 850 000 bytes (b) Denise has three files stored on her …
- Question 2
A sports stadium has an electronic counter that counts each person that enters the stadium. The count is stored as binary in a 16-bit register. A denary value of the count is displayed on a screen at the entrance. (a) …
- Question 3
Five statements are given about error-checking methods. (a) Tick (3) to show whether each statement applies to Automatic Repeat reQuest (ARQ), check digit or checksum. Some statements may apply to more than one error-checking method. Statement ARQ (✔) Check digit …
- Question 4
Frederick prints a document that he has typed. The printer begins to print the document, but then a message is displayed on Frederick’s computer to say that the paper has jammed. (a) Describe the role of an interrupt in generating …
- Question 5
In a Von Neumann model for a computer system, a Central Processing Unit (CPU) contains a number of different components. The table contains the name of a component or a description of their role in the fetch-execute cycle. Complete the …
- Question 6
The paragraph describes an MP3 file, MP4 file and a MIDI file. Complete the paragraph using the list of terms. Not all terms in the list need to be used. • can • cannot • compressed • image • microphone …
- Question 7
Julius creates a computer application that calculates how many years it will take to pay for a house. (a) Julius uploads his application to his website for people to download. Before he uploads the application, he translates the code using …
- Question 8
Consider the following logic statement: …
- Question 9
A parity check is used to check for errors after transmission on the four given binary values. All four values are transmitted and received correctly. Identify whether each 8-bit binary value has been sent using odd or even parity by …
- Question 10
(a) A denial of service (DoS) attack is a type of Internet security risk. State the purpose of a denial of service attack. (b) Phishing and pharming are also types of Internet security risk. They have the same purpose. State …
Other Computer Science papers from Oct/Nov 2021
- 0478/11 Computer systems
- 0478/12 Computer systems
- 0478/21 Algorithms, programming & logic
- 0478/22 Algorithms, programming & logic
- 0478/23 Algorithms, programming & logic