There is no doubt that “multitasking” is one of the best features of iOS 4. But I would like to call it an excellent task switching than using the word multi tasking . Unfortunately, many people have a misconception abt it.So let's dig in.
On your desktop, multitasking means that any application or process can run at the same time as another. Technically, there’s no reason why the same can’t be done on a mobile device. However, from a more practical point-of-view, there is one good reason why you don’t want this: a running app uses energy that decreases your battery life. Running fewer apps means you can listen to music longer, make more phone calls, or call up Maps at the end of the day to find a place for dinner.
But in iPhone when you double-tap on the home button and start another application, the previous application is “paused”(popped out) and put into a state where it’s not running but can be restarted quickly. A part of the freezing process also reduces the amount of memory being used: allowing more applications to fit in the queue stack.
The next time you tap on the app’s icon, it is “jumped out”(pushed in) and put back on your iPhone’s screen while the previous app is frozen. This process is repeated each time you launch an app.
Don't believe me then chk urself by listening to Pandora and the iPod apps at the same time! :)
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