Confidence means you right and over confidence means you are always right.
Confidence is the real determination and hard work by which he can reach the success. But over confidence is just only a feeling without considering his real potential.
Confidence is nothing but a strong determination which helps us in success where as over confidence is nothing is impossible for me.
I can do this work is called "Confidence".
I am the only persons to do this work is called "Overconfidence".
I hope that I will get a job in your company is "CONFIDENCE".
I am the only person to get the job in your company is "OVER CONFIDENCE".