SAP ABAP - Table Control Questions

SAP ABAP - Table Control Questions1) How to make columns fixed in table control :

2) Structure for table controls: SCXTAB_CONTROL    Type Group : CXTAB

3) how to know if screen values changed ?- SY-DATAR

4)  How to make a field disable in table control : - COL-INPUT = ' '

5) SM 50 - check current work processit can do following Tasks:
• End an ABAP program that is running.
• Debug an ABAP program that is running.
• Cancel a process (with or without core) – long running jobs
• End a session
• Activate/deactivate the restart option after an error
• Execute various functions for the process trace  DIA: Work process for executing dialog steps in user transactions.
• UPD: Update process for making U1 (time-critical) database changes.
• UP2: Update process for executing U2 (not time-critical) database changes.
• ENQ: For locking or releasing SAP lock objects.
• BTC: For processing background jobs. BDG
• SPO: For spool formatting processes.

6) SM36 and SM37 B:  - SM36 to schedule and SM37 is to monitor

7) Difference between conversion and interface ?- BDC, LSMW ---- IDOC , BAPI

8) Type Groups in SAP ABAP:- reusability.

9) Value Table and Check table:Only thing happened by specifying a Value table is: System proposes the value table name as the check table name when we try to create a foreign key relationship for the field and we can override this proposal.

10) to create your own data class:- Note 515968

11) JDBG - used in SM37 to debug a background job.

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