about multi tasking hurry plz

[yahoo]

if the task are swiched by softwarew i mean s/w task switching would it still be multitasking?
if i use the systemtimer i.e IRQ0 for the task scheduler for switching between task using the same software task swithing then wot type of multitasking it would be:preemptive or cooperative

[Dangamoose]

multi tasking is the process of managing more than one task anyway, so yes.

Preemptive means the task has no control of its execution.
cooperative means the task has full control of its execution.
So what do you think?