Bhawan cyber tech 
2nd round.
1) what is view 
2) what is m.view 
3) table 1 having two columns col 1 number data type having data empty , col 2 string data type having number ..how can change data type both columns ?
4) what are joins you know?
5) table 1 having 15 rows table 2 having 10 rows 
Common data is 5 .
(1)Inner join how many return 
(2) right join table 1 = table 2
(3) left join table 1= table 2
6) table having  1000 records , date formats is (dd,mm,yy) how to change entire format (dd,mm,yyyy)
7) IN () and BETWEEN () having how many number of elements
8) what is pls error 
9) index
10) one table having 2 column both are indexed , now two tables are drop ..what will happen indexes