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How many classification schemes have been developed for NFRs ?

a) Two
b) Three
c) Four
d) Five

Answer: d
Explanation: Software Quality Tree [Boehm 1976], Roman [IEEE Computer 1985], Process-Product-External considerations [Sommerville 1992], Mc Call’s NFR list and Dimensions of Quality–Components of FURPS+ are the five classification schemes for NFRs.

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