NCR Corporation Software Developer interview questions

sell yourself to me, dont talk about your cv. how do you learn? which technology did you learn in the last 6 months? how do you choose it? explain this technology. where do you see yourself in 2/5 years? how did you fix a problem on production phase? tell about the most interesting project you have worked on and assume that a new colleague has just started and explain the design of your project to this colleague. how can you improve this design? definition of polymorphism, interface and abstract classes and give examples. definition of Overloading and Overriding and give examples. definition of singleton and abstract factory design patterns and write code snippets. correct a question by changing string to StringBuilder. Explain why. what is hastable? compare performance with other structures. explain why. what is garbage collector and how does it work. how does it find the objects that are no longer being used? correct a Stream question by using "using". explain why. what is disposible object? how unmanaged objects are cleaned? write an sql script by using outer join. correct an sql index by changing sort of the columns in the index. in the same question correct the stored procedure by removing hardcoded scripts. write a short program which takes an integer and outputs the number of 1`s in this integer`s equivalent in binary system by using bit shift operator >>. For example 5 is 101 and there are 2 times "1" in it. question about [ThreadStatic] attribute and ThreadPool.QueueUserWorkItem method. question about yield keyword and IEnumerable interface. correct a polymorphism question by changing struct to class.