tell me why?

why use hashtable?
why use stringBuffer?

Interview help me to improves myself

through out this months, i had attended many job interviews from many companies which are from different background. These interviews made me to think about myself-improvements in some important areas. It also told me about my self. It did not lies about me... interviews help me to know who am I. where my level is ?. interviews also help me to find my real weakness. and telling me how to fix the weakness.. Besides that, interviews also help me to getting know what others people do. After these interviews, i really know about my self, and will do some improvements about my self. Thanks to whom gave very constructive advices and ideas.. thanks a lot to Stephan Brandt for giving the best interview session that i ever had. That interview took around 4 hours. we started with a very warming session. no test.. he just gave me the tricky job interview questions.. the answers are no wrong or right.. I hope i get the job.. the job sound like interesting.. the working environment is really interesting...