Which statement about combinations of inputs and preconditions is true for a large system?

Explanation: Testing everything (all combinations of inputs and preconditions) is not feasible except for trivial cases. Instead of exhaustive testing, we use risks and priorities to focus testing efforts. Therefore

  • A. It is not possible to test any of them
  • B. It is easy to test them all in a short time
  • C. It is essential to test them all in order to do good testing
  • D. It is not practically possible to test them all

Answer: Option D