Why is singleton instance static?
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Can we write a class without main method in java?
What is the constructor?
Explain what is encapsulation?
What method is used to know the status of Checkbox(i.e it is checked or unchecked)?
What is the common usage of serialization?
What is the difference between yield() and sleep()?
What is a vararg?
What is string manipulation?
Different types of Layouts?
Are global variables initialized to zero?
what are class,constructor and primitive data types?
What are the two main uses of volatile in Java?