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OO Concepts

 
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What is the meaning of following exam obective under OO Concepts:
"State the effect of encapsulation, inheritance, & use of interfaces on architectural characteristics "
 
Vishakha Ahuja
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I only want to know what architectural characteristics are they referring to here ?
 
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Flexibility, manageability, scalability etc
HTH
 
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Also for developing OO frameworks, components that publish contracts etc.
 
Vishakha Ahuja
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Hi,
I still don't understand how will 'encapsulation and inheritance'
affect the Flexibility, manageability, scalability etc. ?
And Ajith, I'm sorry I didn't get what you mean.
 
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Well, I'll take a shot at part of this. I thought this was a rather vague objective.
Encapsulation helps improve flexibility & extensibility because you hide the details of how things are done behind an interface. As long as you don't change the interface you don't break anything. Inheritance is a mechanism for implementing polymorphism. So if you design your interfaces correctly and use inheritance you can add classes to your system and everything will continue to work. You can even add new behavior to your system in this fashion.
Hope that helps some.
John
 
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