In previous desktop-based browsers that I've used, when activating their built-in Private Browsing mode I'm used to the fact that as soon as the Private Browsing window is closed, all of the tabs that were open during that session are immediately closed and cannot be re-opened. In iOS, however, the behaviour of Private Browsing in Safari seems slightly different in that even if Safari.app is killed from within the App Switcher and even after a full device reboot, the tabs previously opened within Private Browsing are still there.
So - my question. Is any data entered/saved during a Private Browsing session from within Safari saved to the iOS filesystem? Examples of data that I was thinking of would include form history, saved cookies, and visited links. Is this data then cleared when toggling Private Browsing off and then back on?