Question: 6. Answer the following question on software testing. Briefly describe the three principal stages of testing for a commercial software system. (10 marks) 7. Answer

6. Answer the following question on software testing. Briefly describe the

6. Answer the following question on software testing. Briefly describe the three principal stages of testing for a commercial software system. (10 marks) 7. Answer the following questions on software evolution. a. Explain why a software system that is used in a real-world environment must change or become progressively less useful. (10 marks) b. Briefly describe the three main types of software maintenance. (10 marks)

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