What is your greatest achievement?Answer 1 - The underlying agenda is to know what personal qualities were required to achieve it. Don’t go back too far to answer this question as this might give an impression that you have not achieved anything since then. Find a relevant answer in the recent past for this question. If you are a fresher and have been a topper of your college or university, you can say that during the interview.
Answer 2 - An answer to this question should be more professional oriented rather then personal. Mention about achievements that happened at work. Something related to the past projects and applications you worked on for which you were rewarded. Mention about an achievement that boosted you at work. An achievement that made you confident something related to a module you worked on or got your company some revenue.