Answer Posted / nupur
design patterns are the solution of a problem which arises
when developing software within particular context.
each pattern describes a problem which occurs over and over
again in our environment,and then describes a core solution
of that problem in such a way that this solution can be
used again millons of times .
category of design patterns:-
creational:-singleton,protype,abstract etc.
structural:-adapter,bridge,composite etc.
behavioural:-interpreter,iterator,command etc.
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