Which two models doesn’t allow defining requirements early in the cycle?
A. Waterfall & RAD
B. Prototyg & Spiral
C. Prototyg & RAD
D. Waterfall & Spiral
Explanation: Prototyg Model starts with a requirements analysis phase including techniques like FAST, QFD, Brainstorming.In case of Spiral model the first phase involves activities related to customer communication like determining objectives.