Are more ashamed to be a failure or letting down?

Question

Many people feel ashaned when they fail an exam etc.
There are those who feel shame when they let others down.

Answer 1

Many feel ashamed if they fail when they are not giving their best.

If we give our all and fail, we tend to accept that outcome. But, when we don't try to succeed and fail because of this lack of diligence, we cannot maintain an acceptable level of self esteem.

Answer 2

If you did what you can for others you should never be ashamed.