What is the difference between confidence and over confidence?

Confidence: I can do the work with my hard work.

Overconfidence: No one can do this I can only do this, but he is not do something for his work, dreaming something.

For me, Confidence is the potential to achieve the goal with doing hard work.

Where Over Confidence is the ability to achieve the goal in dreams without any doing work?

Confidence: I can do, I will do with hard work, I have ability to do it.

Over confidence: I can only do it, no one can do better than me.

Confidence: Based up on struggle and Hardwork.

Overconfidence: Based up on attitude and negligence to others.

Confidence: Base is Hard work.

Over Confidence: Base is imagination/thinking.

Confidence is being comfortable in your own skin and expressing yourself without feeling insecure or nervous. It comes when one knows one's strengths as well as faults and accepts them to improve oneself.

Overconfidence is when a person 'believes' that he/she is right every single time and that there's nothing the others 'need' do, but follow him/her happily.

If the interviewer says something like, "If you can do it, there are hundred others who can do it too. Why should we choose you and not them?".

If you say because I can do it better than others, the interviewer might twist your reply to mean that you are over-confident.

What to say in such situations? Maybe you can say "Because I'm special! You will find it during my work and never regret your choice.

Shahith said: A person is confident when he know the fact better, a person is overconfident when he think that he know the facts better than others.

Confidence comes from knowledge.

Over confidence comes from attitude.

Confidence: I can do this work.

Over conference: No one can't do this work but only I can do this work.

I can win this game Confidence.

Only I can win this Game Overconfidence.

Confidence comes from your practice and hard work and from being practical and calculated.

Over confidence originates from your attitude and negligence of others.