Now i will be goin to make web based applications in java and would be using JSP. tell me which certification is most worth doing n how to prepare for that.
SCWCD 1.4, so you're in the good forum

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Links.
the company in which i work is an investment banking company so im makin projects that will be used by a bank to carry its work. does any particular certification can help me more.
Banks (or anything else) can use lots of different tools, so I don't think you can say "if you're going to work in a bank, do this java cert".