SAP ABAP Developer

1. What is SAP ABAP and where is it used? 2. What are the different types of ABAP programs? 3. What is an Internal Table? 4. Explain Standard, Sorted, and Hashed Internal Tables. 5. What is a Work Area? 6. What is a Field Symbol? 7. What is a Structure in ABAP? 8. What are Data Elements and Domains? 9. What is a Transparent Table? 10. What is a Primary Key? 11. What is a Foreign Key? 12. What is a Search Help? 13. What is a Lock Object? 14. What is a Function Module? 15. What is a BAPI? 16. What is an ALV Report? 17. What is the difference between SELECT SINGLE and SELECT UP TO 1 ROWS? 18. A custom report displays incorrect data. What basic checks would you perform? 19. An ABAP report is taking too long to execute. What basic performance checks would you perform? 20. A user receives an authorization error while executing a custom report. What would you check?