iPod touch I-pod touch 4g 8gb multi tasking?

yes since it has the same specs as the iphone 4

why not, yes

It has the same specs as the other two (32, 64), so yes.

Now how can we tell when the apps are closed during multitasking? Or do they close and the "multitasking" is just quick switching?

Derkatwork said:

Now how can we tell when the apps are closed during multitasking? Or do they close and the "multitasking" is just quick switching?

Click to expand...

The latter, sort of. You really aren't supposed to care if apps are actually closed or running in the background. The multitasking switcher will list apps you've recently used, whether they are currently running or not.

Just let the OS decide how to manage running/closing apps, and you should be fine.