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I am bit confused for the use of will & would, still not understanding where is it necessary or where we can use one or other.

Following examples for your kind perusal:

A) What will be your answer?     (indicates casual manner)
B) What would be your answer? (indicates formal manner)

I believe both are correct and can be used as per the situation.

marked as duplicate by Laure, Hellion, choster, tchrist May 24 '17 at 1:57

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