Why do we need hashset in java?
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Can a static block throw exception?
What is the largest long allowed by java?
which class to use when concatenating strings in a loop.
what is meant by Garbage collection?
What does int [] mean in java?
What is the purpose of javac exe?
how many design pattern r there? and wht design pattern u use and why ?
What is the differences between heap and stack memory in java? Explain
What is file class and what is its purpose?
explain the concept of virtual method invocation in polymorphism in detail?
What is the mapping mechanism used by java to identify IDL language?
How many types of constructors are used in java?