what is virtual function and pure virtual function ?
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Difference: 'uses', 'extends', 'includes'
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Explain basic concepts of OOPS?
Define a good interface?
Explain method overriding.
What are different ways to create string object?
What is composition? Explain the purpose of composition.
What is the syntax of object oriented method call?
If a class inherits an interface, what are the 2 options available for that class?
What is a functional interface? What is sam interface?
Why is C not an OOP language?
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If there is a conflict between base class method definition and interface default method definition, which definition is picked?
Explain the term constructor
Design Patterns 
