Explain the rationale behind object oriented concepts?
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Describe the Diamond problem. Where does this problem occur?
Explain persistence?
What is the difference between new and override?
Explain about inheritance?
What is difference between class and interface?
What's the main difference between arraylist / hashmap and vector / hashtable?
Why use oops?
What is meant by inheritance? what are the advantages of inheritance?
Can an interface implement or extend another interface?
Comment: C++ "includes" behavior and java "imports"
Is iterator a class or interface? What is its use?
What are abstract classes?