GE Software Engineer interview questions

For what purpose could you think that a software thread could be used in an avionics software?

Second Round(interview round): The duration of this round was almost 40 mins and interviewer asked following questions: 1.Runtime polymorphism 2.Database questions based on normalization. 3. Reverse a string. Third Round(HR) HR asked some of the general questions- 1. Tell me about yourself, about my projects and hobbies. 2. Do you have any location constraint? 3. Any questions about GE? Fourth Round(Telephonic interview round): The duration of this round was almost 15 mins and interviewer asked following questions: 1. OOPS concepts 2. Projects 3. Interest Area