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Hi,



Output is :30,30,10,20

What is going on in the program?
How the control is getting transfer in the program?
Please help me.

Thanks
 
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Objects 'o1' and 'o2' both refer to an object of type 'C', so m1() in class 'C' is invoked twice, because overridden instance methods invocation is determined at Runtime based on the object type.

Variable access is determined at Compile time based on the reference type.
 
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