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What are the most useful Java API methods for coding interviews and coding competitions?

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Suppose we not able to handle the runtime exception we can throw the exception to the caller Whether it is normal method or main method where u write ur connection coding Example In th main method Public static void main(String args) throws SQLException
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API’s doesn’t matter. I’ve encountered a lot of programming competitions and most of the problems requires an algorithm like sorting and searching, algorithm using a recursive function and a lot of mathematical problems. I would recommend that you study Data Structures and Algorithm Analysis.
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