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what is waterfall model?explain? what is v model? explain
all phase?and the difference between two model?

Answer Posted / preeti

waterfall model model follows the folowing steps:
requirement-->analysis-->Design-->coding-->Testing--
>Maintainance-->final product.testing is the fifth step
after the coding been performed.

V Model-Verification&Validation model.
customer requirement<------------->Acceptance testing
specification <-------------->System testing.
High level design<--------->Integration Testing.
Low level design<------->Unit Testing.
Coding

as given here in V model testing is done at every
stage.right from Initial Requirement phase till end phase.
Verification & validation are performed end to end.

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