3i infotech questions

Tell about yourself 
Tell about your project
Delete duplicate records from table 
Joins and types
Write a query on 5th maximum salary 
Diff b/w delete,drop,truncate
Diff b/w views and materialized view
What is gtt
What is Stored procedure and example
What is compound trigger
Functions and purposes
When you used pragma autonomous transaction 
What is dynamic SQL?
Some queries asked