Infosys Senior System Engineer interview questions

1. Diff b/w Abstract & Interface? 2.Class cannot override any other class? how? 3.Integer a = new Integer(null); What will be the o/p? 4.Diff b/w throw & throws? 5.Write a program reverse a string without using reverse function? 6.Write a program to remove duplicate element in a list by java program? 7.Dependency Injection 8.First level cache & Second level Cache in Spring 9.Overriding method with program 10.Sort the salary in Emp table by using Comparable 11.Name of hibernate configuration file 12.Singleton Example 13. Exception catch{} finally{} works without using try {} 14. SQL Query...