Ordinary level 2026 littoral regional mock computer science 2
Ordinary level 2026 littoral regional mock computer science 2
1. (a) Your Principal wants to purchase a printer for the school which will be used to print hard copy
documents such as report cards. She wants to determine which type of printer (Impact or nonimpact) is more cost effective. She had been advised that while impact printers are cheaper, print
quality and ink consumption are the most important factors to consider when purchasing a printer.
(i) Base on the given information, which printer type is she likely to select?
Justify your answer. (3 marks)
(ii) Define the following terms as mentioned above;
➢ Hardcopy
➢ Impact printer
➢ Non-Impact printer
➢ Print quality (8 marks)
(b) Consider the logic circuit in Figure 1 below:
Figure 1 Figure 2
(i) From figure 1 above,
➢ Give the output P in terms of X and Y.
➢ Give the output B in terms of X and Y
➢ What is the output R, in terms of P and B (3 marks)
(ii) Based on Figure 1, copy and complete the truth table in Figure 2. (3 marks)
(c) A double sided DVD has a capacity of 10.0GB. How many CDs of 700MB storage capacity are
required to store information in a full double-sided DVD? (3 marks)
2. (a)
(i) What do you understand by the term computer generation? (2 marks)
(ii) For each of the following computer generations state the components that were used for
inputs and outputs.
Generation Input Output
(4 marks)
(b) Humans interact with computer systems through user interfaces.
(i) What is a user interface? (2 marks)
(ii) Briefly describe the following user interfaces. For each interface, state the main hardware
device used.
➢ GUI
➢ Command Line Interface
➢ Voice recognition (6 marks)
(c) Differentiate between each of the following pairs with examples
(i) Multi-programming and Multi-processing computer system. (3 marks)
(ii) Batch processing and real time processing of data. (3 marks)
