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1. Why is changing only the return type insufficient for method overloading?

A. Java does not support return values B. It creates ambiguity when selecting the method C. Return types are ignored during compilation D. Methods cannot have different return types

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2. What is method overloading?

A. Same method name with different parameter lists B. Same method name and identical parameter lists in parent and child classes C. Multiple classes with the same name D. Changing only the return type of a method

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3. Which form of Singleton creates its instance when the class is loaded?

A. Lazy instantiation B. Early instantiation C. Dynamic binding D. Runtime instantiation

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4. Which design pattern ensures that only one instance of a class is created?

A. Factory Pattern B. Adapter Pattern C. Singleton Pattern D. Observer Pattern

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5. What is the purpose of a private constructor?

A. To force every class to be inherited B. To restrict object creation C. To make every method static D. To enable method overriding

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6. Which interface must a class implement to use the standard `clone()` mechanism described for object cloning?

A. `Serializable` B. `Runnable` C. `Cloneable` D. `Comparable`

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7. Which OOP principle involves wrapping data and code into a single unit?

A. Inheritance B. Encapsulation C. Polymorphism D. Association

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8. Which concept focuses on hiding implementation details while exposing functionality?

A. Abstraction B. Inheritance C. Association D. Coupling

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9. Which construct can provide both abstract and non-abstract methods?

A. Abstract class B. Primitive type C. Array D. Package

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10. Which statement about Java interfaces is correct?

A. An interface can only be extended by a class B. An interface cannot participate in multiple inheritance C. An interface can support multiple inheritance D. An interface must always contain instance variables

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