How to convert string to byte array and vice versa?
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Explain OOPs concept.
Difference between object instantiation and construction ?
I don’t want my class to be inherited by any other class. What should I do?
What are the ways to instantiate the class class?
What is the difference between a method and a procedure?
What is a java applet? What is an interface?
Can we pass a primitive type by reference in java? How
What is thread synchronization in java?
What collections you have worked on? Internal working of Hashmap?
How many types of threads are there in java?
How to make a method thread safe without using synchronized keyword?
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What environment variables are required to be set on a machine in order to run Java programs?