Difference between abstract class and Interfaces?
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Answer Posted / taresh nama
• Interfaces provide a form of multiple inheritances.
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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