SURVEY ON QUESTION ANSWERING SYSTEM.

Question answering is an important technique in this new era of information. Question answering system comes under the branch of natural language processing. It works with full potential of information extraction and information retrieval in the area of text mining. Automatically answering repeated question will help us to answer repeated questions exactly ones and it will help to save wastage of resource. This method is very well suited for web based QA systems.This paper mainly aims different technique in answering repeated questions.