Is an empty arraylist null?
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difference between java ,c#&java,c++
What is variable and its types?
what is mean by String and StringBuffer? What is mean by Methooverriding and Overloading?
Lowest Common ancestor in a Binary Search Tree and Binary Tree.
What is a resource leak ?
Define packages in java?
transaction attributes ?
how to create multithreaded program? Explain different ways of using thread? When a thread is created and started, what is its initial state? Or extending thread class or implementing runnable interface. Which is better? : Java thread
What is the use of list in java?
What are the four integer types supported by java?
Explain try and catch keywords in java?
Is an integer an object?