Cameroon GCE ordinary level June 2025 computer science 2
Cameroon GCE ordinary level June 2025 computer science 2
1. (a) (i) State any three (03) health concerns associated with prolonged use of the computer.
(ii) Briefly describe measures that can be taken to reduce or prevent each of the health concerns
you identified in a(i) above.
(b) Briefly explain what is meant by;
(i) Database normalization. .
(ii) Data consistency.
(iii) Data redundancy.
(c) Briefly describe the following computing terminologies.
(i) Client-server network
(ii) Peer to peer network
(d) (i) What is a biometric system?
(ii) Describe any two examples of biometric data.
(3 marks)
2. (a) Identify a suitable networking device and briefly explain its role in solving the following networking problems.
(i) Linking a LAN to the Internet.
(ii) Linking two large LANs of an institution.
(iii)Controlling the communication signals in and out of an institution’s extranet.
(iv) Collecting TV signals from different sources and then channelling them to local TV sets.
(b) In each of the following scenarios, identify the Data Transmission Mode and explain how it applies in the given context.
(i) John watching a TV and listening to the commentaries of a football match in his house.
(ii) John and Mary carrying out a conversation using cell phones.
(iii) Paul and Peter sharing information through a walkie talkie.
(c) (i) State the reason why technicaily, lkilobyte (KB) = 1024 Bytes (210 bytes) instead of 1KB = 1000 Bytes. (2 marks)
Hence convert 10GB to,
(ii) Megabytes (MB)
(iii) Kilobytes (KB)
3.(a) Briefly explain why an operating system,
(i) Should be the first software to be installed in a computer system.
(ii) Should be able to carry out multitasking.
(iii) Creates virtual memories.
(b) Identify and briefly describe the role of any five (05) basic hardware components (or devices) that are involved
from the moment data is input to a computer system until, when a hardcopy is generated from the system. (10 marks)
(c) Convert each of the following showing clear working,
(i)The hexadecimal (base 16) number B2Aj6 to Binary (base 2).
(ii)The octal (base 8) number 62578to Hexadecimal (base 16).
4. (a) (i) What is cloud computing?
(ii) Describe any two (02) basic requirements of cloud computing.
(iii) Explain any two advantages of cloud computing.
(b) Briefly describe each of the following file protection mechanism,
(i) Backup
(ii)Data encryption
(iii) Archiving
(c) A project team consisting of persons living in different localities, decides to hold an online meeting.
During the meeting each person is to do a presentation of work progress.
(i) State a technology that will enable the team members to hold a successful meeting.
(ii) State and explain the roles of any two tools that will enable each team member to participate effectively
in the meeting.
(iii) Describe any one advantage of using the technology or means you stated in c(i) above to the participants. (1 mark)
