Hello Venkrat,
To find the events, go to SE11 to display/change the view.
Once in the view, follow menu path Utilities->Table Maintenance Generator.
In the next screen, follow menu path Environment->Modification->Events.
Any events that have been customized will be listed.
Also, you can look at the drop down list for the table column "Table maintenance dialog event" for all possible events.
Regards,
Kim