(i) Computer Display (Monitor) (ii) Printers (iii) Plotters (iv) Speakers.
(c)(i) A Computer virus is a small software program that spread from one computer to another and interferes with computer operation.
A Computer virus might corrupt or delete data on a Computer, use an e-mail program to spread the virus to other computers, or even delete everything on the hard disk. (ii) Rootkit, Trojan horse, lavandos, worm, Agiplan, Agen a, A braxas and Sobig b.
(d) 2BC${}_{1}6$
(2 x 16${}^2$) + (Bx 16${}^1$) + (C x 16${}^0$)${}_{1}0$
(2 x 25${}^2$) + (11 x 16) + (12 x 1)${}_{1}0$
(512+ 176 + 12)${}_{1}0$
700${}_{1}0$ = 700 Is an hexadecimal number and it is represented as 0 X 2bc.
In decimal mode, 2bc is 700.
In Octal mode 2bc is 1274.