Java interview questions: - 20 Basic Interview questions on Java? Part: -3.

·          What is Upper bounded wildcards in generics?

·          What is JAR file?

·          What are different types of inner classes?

·          Can we declare an anonymous class as both extending a class and implementing an     interface?          

·          What is the difference between a static and a non-static inner class?

·          How does Java handle integer overflows and underflows?

·          Does garbage collection guarantee that a program will not run out of memory?

·          What is the purpose of finalization?

·          Can an unreachable object become reachable again?

·          What is a reflection package?

·          What do you mean by immutable? How to create an immutable object?

·          What is class loader in java?

·          What is a weak reference?

·          What is object cloning?

·          What is object pooling?

·          What are marker interface /tag interface?

·          What is the difference between Comparable and Comparator?

·          Does a class inherit the constructors of its superclass?

·          What are annotations used for?

·          What are the annotations used by compiler?

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