Friend, read your questions, are you copying and pasting from Google? Sorry, but you are redoing several questions that have already been asked on the forum. Then take some time and check what other people have posted. You will learn a lot here on the forum.
It depends on the situation. QQ is a made hand and has a slight edge preflop against AK, but AK has more playability postflop and can dominate hands like AQ or AJ. If I'm deep-stacked, I might prefer AK since it has more potential to hit strong hands. But in a shove-or-fold scenario, QQ is more reliable.