1.Are you aware of design patterns, code for singleton. Where do we use it? 2. WAP to get a string and find out the letters repeated. 3.Sessions, how can sessions be used if some security concerns are raised- 4.Sql query to fetch list of employee names that has departments stored in another table, where the employees appear in more than one department. 5.Challenges that you have faced where you came up where others were not able to solve. 6. Question on n-tier architecture 7.Where are APIs hosted
