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Question: What is the difference between an Iterative model and the Waterfall model?
Answer: Waterfall Model is a flow based model, in which we pass every phase once, and can not go back to that phase again. Its most eminent drawback is that if there is any change in requirements, we cannot make any changes to the requirement section. Iterative Model is somewhat similar to waterfall model but herein we can always come back to previous phases, and make the changes accordingly.

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