Is paraller processing possible in NetSuite

Schedulescript Status

Workflow action script and UserEvent Scripts?

What is the difference between fieldChange and PostSourcing function?

Field change function will trigger on after changing the value of field if you are moving from that field field change function will trigger.


PostSourcing function will trigger on after sourcing all the dependent fields on that field

what is the difference between userEventBeforeSubmit and userEventAfterSubmit?

It's based on requirement if you want to perform the operations before saving of the record then we will use the beforeSubmit operation.
If you want perform the operations after saving of the record then we will use the afterSubmit event.

What is the difference between onSave and Before Submit functions.

1.onSave function is used to do the validation purpose.By using onSave function we can stop the record save .
2.By using before submit function we can't stop the record saving

What is the difference between Client and User Event scripts

1.Generally client scripts are useful to do the validations on the record fields.
2. Userevent scripts are used to do  record level operations