HARMAN interview questions

1st Face to Face Interview (By Harman Employee) --------------------------------------------------------------- Explain four principles of OOPS Abstraction. Example What is the default access modifier of Class constructor Default access modifier Of Abstract class Encapsulation example Polymorphism Static Overloading scenarios Explain below try { exception } catch { throw exception }finally { 1/0 } LINQ: Acheive Left Join on List1 and List2 Solid principles : What does "L" stands for. He tried to confuse me around Liskov and Interface segregation to check understanding. Design pattern : Singleton We can use static class, why to go for Singleton class? Multi Threading question How do u protect Singleton in Multi threading. Client Interview: ---------------------- Difference between Abstract class and static class. Difference between Delegate and Event Delegate: What is Covariance How can you return Custom Data Type in LINQ (Using Select) Difference between abstract and interface IDisposable and Finalize WCF: Data Contract Vs MessageContract in WCF. SOLID principles: Explain any two. What will you do if you want more than one return value from a method? (A: out or ref).