Trending @Accenture; Is it possible to take resignation back after 70 or 80 days if no offers received?

Yes , keep good relation with your manager

Yes, it is possible. But you must think that you are so poor in skills that you are thinking these things. If yes, then don't wait for 80 90 days, go accept your defeat and take resignation back now. If no, then go ahead and work on the goal

Yes, but needs project approval

It needs your Manager approval, so if you are in good term, then only you can take back

Try it all depends on your performance, feedback & relationship with your manager, and hope they have not put you into PIP....

One more condition that they haven't found your replacement yet...