Theory question 103
Information Transmission(a) (i) With the aid of a simple diagram, explain information transmission. (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.
Show the model answer
(a)(i) Information transmission is sending information from a sender (source) through a channel (medium) to a receiver. Diagram: SENDER → (encoder) → CHANNEL/MEDIUM → (decoder) → RECEIVER, with feedback from receiver to sender.
(ii) Any one: telephone call; e-mail; radio/television broadcast; SMS; fax; town crier or drum message.
(b)(i) MS-DOS (or Palm OS).
(ii) Windows (e.g. Windows 7/10) or Mac OS.
(iii) UNIX, Linux or Windows Server.
(c) Any four: windows; icons; menus; pointer (mouse); buttons; dialogue boxes; toolbars; scroll bars.
Draw a labelled block diagram: sender, medium, receiver.