How were your vacations should be accepted as a good answer
To me "holidays" refers to the holiday time in general whereas "vacations" would mean that the person did multiple holidays. Something that really isn't implied in the German sentence.
No native though, so I could be wrong.
You are exactly right .
I was given the translation for were = wart/warst beforehand, Anyone can explain ?
It's the different personal pronouns for "you": ihr wart, du warst