Ordinary level 2026 Holy Infant school mock computer science 2
Ordinary level 2026 Holy Infant school mock computer science 2
1.(a) A mobile phone salesperson is explaining a new model’s specifications: “octa-core processor, 8GB
RAM, 256GB storage.”
| (i) Explain to a customer what octa-core, means and how it benefits daily use. | (2 marks) | |
| (ii) The customer asks, “Is 8GB of RAM or 256GB of storage more important for keeping many apps | ||
| open? Justify your answer. (iii) State one common type of port on this phone and a device that would connect to it. |
(2 marks) (2 marks) |
|
| (b) Convert the following number systems: | ||
| (i) The binary number 1000011 to decimal. (ii) The octal number 1738 to hexadecimal. (ii) Solve, 101010₂ – 1111₂ . Show your working clearly. |
(2 marks) (2 marks) (2 marks) |
|
| (c) A student complains their laptop is very slow when running video editing software. | ||
| (i) Suggest one software-based action to potentially improve performance. (ii) Explain how upgrading the RAM addresses this specific problem. (i) State two health concerns from prolonged computer use (ii) And suggest one ergonomic practice to prevent each. |
(2 marks) (2 marks) (2 marks) (2 marks) |
(d) |
2. (a) Consider the logic expression 𝐀. 𝐁 + 𝐀̅. 𝐁̅ = 𝐘
| (i) Draw the corresponding logic circuit. (ii) Produce the corresponding truth table (ii) Identify (label) three types of basic gates on the circuit. |
(3 marks) (3 marks) (3 marks) |
|
| (b) Give TWO examples of assistive technologies that can help visually impaired persons use computers. | ||
| (2 marks) | ||
| (c) A school’s online form for club registration includes an “Age” field. | ||
| (i) Define data validation. (ii) Design two specific validation checks for this field. (i) Briefly explain why computers use the binary number system . |
(2 marks) (2 marks) (2 marks) |
(d) |
(ii) Determine how many 700MB flash drives will be needed to backup a file size of 23.5GB. (2 marks)
3. (a) A business with a main office in Douala and a new branch in Buea needs to connect their computer
systems.
| (i) What type of network connects computers within the Douala office? (ii) What type of network is required to connect the offices in Douala and Buea? |
(1 mark) (1 mark) |
| (iii) The Douala office uses a Star Topology. Give TWO reasons to justify this choice over a Bus | |
| Topology. | (2 marks) |
