1. Different between Index Full Scan and Index Fast Full Scan? 2. How do joins work in an SQL and how do they impact the execution plan? 3. What are ITLs and why do you use them? 4. How to handle heavy concurrent environment in oracle? What architecting solutions can you provide to achieve exceedingly good performance? 5. How many oracle wait events do you know and how to resolve each of them? 6. Most recent Oracle related admin/performance issues that you faced and how did you resolve them?
