Question 3
- (a)(i) With the aid of a simple diagram, explain information processing.
(ii) Give one example of information transmission.
(b) Give one example of each of the following:
(i) single user, single tasking operating system;
(ii) single user, multitasking operating system;
(iii) multi user operating system.
(c) List four features of a Graphical User Interface.
Observation
The expected answers were:
3(a)(i)
Information transmission is the process of sending Information from one point to another through a channel.
(ii) Example: Printing of document; classroom instruction, receiving radio signals; DSTV signals, Telegraph, GSM, Photography, Facsimile, Town Crying, Smoke Message, Use of Birds, Story Telling, Signs/Signals, Internet, Satellite signals, Blowing Horns, Drum Beating, Fire Lighting etc.
(b) (i) DOS, OS 2, PC-DOS, Palm-OS.
(ii) MS Windows, Mac-OS, Linux
(iii) Xenix, Zenix, Unix, Linux, Mac OS, VMS, Mainframe OS
(c) Features of a Graphical User Interface (GUI)
(i) Windows
(ii) Icons
(iii) Menus
(iv) Pointing device (mouse)
Candidates were expected to answer question on the concept of information transmission. However, a good number of candidates lacked knowledge on the topic.