Hi amit.rajrappa,
Thanks for writing in. A 690 on its own should allow you to be in the mix at all the schools you mention, and probably most competitive at Darden and Cornell. As you likely know, the Indian male engineer category is usually quite large, so it will be important for you to differentiate yourself through leadership experience, post-MBA goals, and other non-work activities, to the best you can.
Good luck!
Daniel Richards
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