Real Time questions ..in sap ABAP

1. Which client number you use for the current
   project?
   
2. You are running a report. It is taking long time for
   execution. What steps will you do to reduce the
   execution time.
   
3. After running a BDC program in background, next
   day morning when you see the results, few records
   are not updated(error records). What will you do
   then?
   
4. You are given functional specs for a BDC program
   and you need to decide whether to write a method
   call transaction or a session. How u will decide?
   
5. What is the difference between report and script?
   
6. what are the differences between scripts & smart
   forms?
   
7. what are enhancements?
   
8. what are user-exits?
   
9. what is badi?
   
10. what is the difference between user-exit & BADIs?
    
11. what is the difference between user-exit &
    customer-exit?
    
12. how do you get functional specs when you are
    assigned some object? (specs through email..??)
    
13. How do you write technical specs?
    
14. How do you write UTP?(unit test plan)