1. Explain What are the differences between RowClass and RowSet in PeopleSoft?

Row class is the component object where it binds all the row's in all level will be in the buffer

Row set is the set of rows that are in the level one from there for every rowset you can access the data in the level two

4. Do you know What Record Changes does not affect Database?

Change in List box in Record Field properties (correct)