Q. All methods must be implemented of an interface.

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Q. What type of variable can be defined in an interface?

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Q. What does an interface contain?

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Q. What type of methods an interface contain by default?

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Q. What will happen if we provide concrete implementation of method in interface?

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Q. What happens when a constructor is defined for an interface?

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Q. What happens when we access the same variable defined in two interfaces implemented by the same class?

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Q. Can “abstract” keyword be used with constructor, Initialization Block, Instance Initialization and Static Initialization Block.

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Q. Which of these package is used for graphical user interface?

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Q. Which of this package is used for analyzing code during run-time?

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Q. Which of this package is used for handling security related issues in a program?

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Q. Which of these class allows us to get real time data about private and protected member of a class?

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Q. Which of this package is used for invoking a method remotely?

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Q. Which of these type parameters is used for a generic class to return and accept any type of object?

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Q. Which of these type parameters is used for a generic class to return and accept a number?

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Q. Which of these is an correct way of defining generic class?

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Q. Which of the following is an incorrect statement regarding the use of generics and parameterized types in Java?

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Q. Which of the following reference types cannot be generic?

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Q. A java interface can contain _______.

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Q. Which of the following is a correct interface?

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