Differentiate between a class and a method.
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Why is class hierarchies managed in object-oriented programming?
What is an interface?
Classes and structs support inheritance. Is this statement true or false?
What are virtual functions, base class pointer, derived class pointer, biding references?
0 Answers HPCL, Hughes Systique Corporation,
How to define an abstract class?
Is it possible to provide method implementations in java interfaces? If possible, how do we provide them?
Explain the purpose of composition.
Difference: 'uses', 'extends', 'includes'
7 Answers Cognizant, Protech, TY, University,
What is a constructor in class?
explain the difference between operator overloading and function overloading.
Which OOPS concept is used as a reuse mechanism?
What is meant by “abstract interface”?
Design Patterns 
