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Message: [QUOTE="Murali Krishna, post: 2565780"] yes I agree Rolf. I have a query. In an interview, they asked my friend about shallow and deep copy. he could not explain because we never heard about that. After that some one said.. deep copy happens through default constructor and shallow copy is thru copy constructor. I think I did not match them correctly. plz correct which is deep and shallow. and also said.. Copy constructor is dangerous. While programming with pointers, it may lead to exception. and shallow (copy constructor) will not have that problem. Plz tell about this. -- Murali Krishna. [/QUOTE]