Which SDLC model is described as repeating four phases (requirements gathering, design, build, evaluation)?

Which SDLC model is described as repeating four phases (requirements gathering, design, build, evaluation)?

• A. Waterfall
• B. Spiral
• C. V-Model
• D. Agile

Answer: (B)

This question focuses on how different SDLC models handle iteration. The model described repeats four activities—requirements gathering, design, build, and evaluation—in successive cycles. That pattern is characteristic of the Spiral model, which conducts iterative loops where each cycle defines objectives, analyzes and mitigates risks, develops and tests the product, and then evaluates results to plan the next iteration. Waterfall is a linear sequence with no looping back to earlier stages. The V-Model mirrors Waterfall but emphasizes corresponding testing activities for each development phase rather than repeating a four-phase cycle. Agile emphasizes short, collaborative iterations with flexible requirements rather than a fixed four-phase loop in every cycle.

This question focuses on how different SDLC models handle iteration. The model described repeats four activities—requirements gathering, design, build, and evaluation—in successive cycles. That pattern is characteristic of the Spiral model, which conducts iterative loops where each cycle defines objectives, analyzes and mitigates risks, develops and tests the product, and then evaluates results to plan the next iteration.

Waterfall is a linear sequence with no looping back to earlier stages. The V-Model mirrors Waterfall but emphasizes corresponding testing activities for each development phase rather than repeating a four-phase cycle. Agile emphasizes short, collaborative iterations with flexible requirements rather than a fixed four-phase loop in every cycle.