How much software testing is sufficient?

Question

Technology has evolved and is continuing to envolve in such a way we are becoming increasingly depend on it our day to day lives. Software code is now present is almost all devices we use, such as games, mobile aps, and electronic control module in car. Share own thoughts on software testing.

Answer 1

An extensive test that finds hundreds of errors doesn’t imply that it has discovered them all. There could be many more errors that the test might have missed. The absence of errors doesn’t mean there are no errors, and the software is perfect. It could easily mean ineffective or incomplete tests. To prove that a program works, you’d have to test all possible inputs and their combinations.