He's dead for good sorry, although Harry does meet him at King's Cross Station/inside his head.
Snape killed Dumbledore because Dumbledore asked him to but no one knows except Harry who only finds out in the last book
no. dumbledore died in half blood prince and hagrid didn't die in the series
No. If they die they die.
yes
he will come back when you die.
no you come back as a cat of a fly
It is not known who exactly cast the spell that caused Ariana's death. Albus Dumbeldore, Aberforth Dumbeldore and Gellert Grindelwald have an argument, culminating with they fighting each other with wands. Amidst the confusion, Ariana comes and gets hit by one of the spells causing her unstable magic to spill out (she was a Squib), and destroy her.
In real life? No. Once you die, that's it. You never come back.
yes
It depends on what you believe in! Some people think that when you die well, you die. And others think that you can come back as an animal or a baby! So it really just depends on what YOU believe in!
After you die, if you have a happy life, you come back as a human. But if you have a bad life you come back as an animal.
he will come back very soon. Hindi cinema will never let him die.