How is a Question/Answer community different from a typical forum?
A Question/Answer community is different from a typical threaded discussion forum because it focuses on finding answers to the questions of its members. A typical forum, by contrast, operates more like a discussion group, where people are free to give their opinions and topics tend to be more subjective.
By keeping more focus on questions and answers, this community ensures that finding answers to the existing questions - and getting answers to new questions - can be done without any distractions.
there we get the question and answer very quicly