There are lots of Q&A site on Stack Exchange.
I asked a question on Programmers. But it was migrated to Stack Overflow.
There are many questions about data structures and algorithms asked on Stack Overflow, but some are downvoted, and I don't know why.
Is there a specific Stack Exchange site to post algorithm (data structure) questions? Or, more precisely, do we have stack exchange site for people who face interviews?
Which Stack Exchange site is meant for what?