Question: how to overcome depression in life due to failure in exams? 

Answer: Exams only grade your knowledge in a specific area. Life is another thing, experience it, you will always get 100% no matter what. This is not something you should be depressed by. Be happy. Enjoy your life, you can always take the course or exam again.
This example question from the Yahoo Q&A forum is categorized in the topic: Education & Reference