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OOPs INTERVIEW QUESTION & ANSWERS

DOT Net
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16. How do objects communicate with one another?
  Objects communicate by sending each other messages. Calling a message is synonymous with making a method or procedure call.
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17. What is the use of base keyword?
  The keyword base is used to access members of the base class from inside a derived class.
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18. What is an accessor?
  An accessor is a behavior that gives you access to an object’s internal data.
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19. Define Inheritance?
  Inheritance is deriving the new class from the already existing one.
  Posted by Aswini Aluri. (Nov 20, 2013)
 

It used for code redundendcy.
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20. What is a delegate?
 
  • Delegate is a class that can hold a reference to a method or a function.
  • Delegate class has a signature and it can only reference those methods whose signature is compliant with the class.
  • Delegates are type-safe functions pointers or callbacks.
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