What is a lock or purpose of locks in java?
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What is the default value of an object reference declared as an instance variable?
What is skeleton and stub?
Can list be null in java?
Can a class be defined inside an interface?
Can you give names of Container classes?
What is a type parameter in java?
What is size of int in java?
Can an interface have a class?
What is nullpointerexception in java?
Who developed java?
What is an object in java and how is it created?
what are class,constructor and primitive data types?