What do you mean by virtual function and virtual classes?
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Every object has : state, behavior and identity - explain
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What is inheritance?
Write about abstract base classes?
What are the types of polymorphism?
Why abstraction is important?
What is the difference between abstract & interface?
What is static and dynamic Binding?
What is single and multiple inheritance?
Define modularity?
What's the main difference between arraylist / hashmap and vector / hashtable?
What is bootstrap, extension and system class loader? Or can you explain primordial class loader?
Can you create an instance for an abstract class?