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Class X defines method M1( ) as abstract. Class Y inherits from Class X and implements the method M1( ). Given the following code, explain why a reference to the abstract class X is allowed to refer to an object of the concrete class Y. Explain what happens when the reference to the abstract class X is used to execute method M1( ). X obj = new Y( ); obj.M1( );

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Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M9498426

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