ABAP Data Dictionary

DATA DICTIONARY

1. What is data Dictionary ?
   
2. What is the difference between open sql & native sql ?
   
3. Difference between Pooled, cluster & transparent tables?
   
4. What is Primary key, foreign key ? what is primary index?
   secondary index?
   
5. how many indexes can be created for a table?
   
6. what is a value table?
   
7. what are the components of a table?
   
8. what is a domain?
   
9. what is a data element?
   
10. what is data class?
    
11. can you create a table with out a data element?
    
12. can you create a field with out a data element?
    
13. What approach you prefer for creating a table?
    
14. Give few names of cluster tables in sap?
    
15. Give few names of pooled tables in sap?
    
16. give few names of transparent tables?
    
17. what is a buffer and how many types?
    
18. what is table maintenance generator and how to create
    that? What is the transaction code?
    
19. How to add new fields to a standard sap table ?
    
20. How many types of table joins are there?
    
21. difference between inner join & outer join?
    
22. Difference between "select * from mara" and "select
    single * from mara"?
    
23. what is a match code ? Lock objects ?
    
24. what are views?
    
25. what are logical tables/database?
    
26. what is the difference bet'n table and a structure?