They mostly asked database questions

Automata : 1) Given a matrix and a target value,you have to tell how many numbers in the matrix are greater than the target value. No brainer. 2)Pattern : 11111112 23333333 33333334 45555555 Technical Round Questions(Random order): 1) What is a linked list? 2) Advantages of Linked list over arrays? 3) Why we use trees? 4)Can we have different types of data simultaneously in a node of a linked list? 5) What are different Opps concepts? 6) Different types of polymorphism ? 7) What are your technical interests ? 8) Are void fun(int a,int b) and int fun(int a,int b) overloaded ? What will happen if we call fun? 9) Pattern : * * * * * * * * * * 10) Projects ? Did you use ER diagrams in your projects? 11) Given a single table employee with columns emp_id, emp_name , manager_id write a query to return emp_name,emp_id and manager_name. 12)Why we use group by? Out of these questions i got stuck with the 11th and 9th. Probable reason of my rejection