I have been facing this question very frequently, please help me : my question is..
WHAT IS THE BUSINESS LOGIC LAYER AND WHAT IS THE IMPORTANCE OF BLL
Then i replied as bll is used to communicate the ui layer and dal and bll contains methods and properties.
Then interviewer said , What methods and properties which are used in BLL , directly you can use those methods and properties in ui layer instead of BLL. " Then what is the importance of BLL? ". Please help me on this question.