Bean scope

it's of five type:
a)singleton
b)prototype
c)session
d)requests
e)global session

-> singleton is by default. so the hash code of all singleton object will be same.
    it can be changed in two ways: 
    1)In config file:  <bean class ="" name="" scope=""/>
    2)Under @Component
                @Scope("")    scope is only used with component.

->prototype: every time new object is give and has different hash code

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