need some help

Hi Guru's.

Could u please let me know answers for these

1..Which system variable is used for tracking whether a program is

executed in Background or in Foreground?

3.How can you convert your SAPSCRIPT into it's PDF format?

4.Can you delete a field of a transparent table when data is already

recorded in that table?

5.what is parallel cursor method? How can be the nested looping be

replaced by parallel cursor method? Write one simple code to

illustrate this.

Thanks in advance