List out all the similarities/difference between an Abstract class and Interface?
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List out all the similarities/difference between an Abstract class and Interface? 
07-24-2007, 03:16 AM
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 Re: List out all the similarities/difference between an Abstract class and Interface? Differences are as follows: Interfaces provide a form of multiple inheritance. A class can extend only one other class. Interfaces are limited to public methods and constants with no implementation. Abstract classes can have a partial implementation, protected parts, static methods, etc. A Class may implement several interfaces. But in case of abstract class, a class may extend only one abstract class. Interfaces are slow as it requires extra indirection to to find corresponding method in in the actual class. Abstract classes are fast.     |
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