Describe the terms: process before output (PBO) and process after input (PAI)

For an SAP exchange, the graphical portrayal of the screen and related handling rationale is known as a dynpro (dynamic program). Each dynpro comprises of a PBO/PAI module to get ready and procedure the information showed or entered on the screen.

Process Before Output (PBO): A preparing occasion which is called before the screen is shown. Its undertakings incorporate the introduction of the screen fields and supply default information esteems for the screen.

Process After Input (PAI): A handling occasion occurring after you leave a screen. Its assignments are to process the info information or start the update of the database.