Pergunta de entrevista da empresa Cornerstone OnDemand

Questions OOPs(Pillars), Abstraction, Extension Methods, Garbage Collection Life cycle, Abstract class, Sealed class, Explain Object and Class, Why need Abstract class? Problems: - Swap Logic without using third variable, - sort function(implement such way that it should be able to sort ascending or descending with given flag) - Query Highest Salary from table of Emp(Name, Salary)