SDLC Interview Questions and Answers

Question: Explain when to use the Incremental model.

Answer: Incremental model should only be used when:
Requirements of the complete system are clearly defined and understood. 
Major requirements must be defined; however, some details can evolve with time. 
There is a need to get a product to the market early.
A new technology is being used
Resources with needed skill set are not available
There are some high risk features and goals.