1. What are Triggers? Explain and differentiate type of Triggers? 2. What are Views? Materialized View? 3. Explain Job role in the Current Company? 4. What is Index? Type of Indexes? Advantages and Drawbacks? 5. Difference in group by and having? 6. Write a query to get number of employee having same salary? 8. Mutating table error and Autonomous transaction? 9. Statement level and row level triggers?