What is the use of hashmap in java?


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More Core Java Interview Questions

Can a list be null in java?

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What are the important methods of java exception class?

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Write down program for following scenario. Use java coding standard. You have array list with some words in it..we will call it as dictionary….and you have a arbitrary string containing some chars in it. You have to go through each word of dictionary and find out if that word can be constructed with the help of chars from arbitrary string given. If you find the word print it else print none.

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What are the advantages of exception handling?

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What is meant by throwing an Exception?

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Which collection allows duplicate values in java?

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What does system out println () do?

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Is there a case when finally will not execute?

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What the difference is between execute, execute Query, execute Update?

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How we create object in copy constructor?

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How do you replace all in word?

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What is an interface in java?

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