3-tier

I am contemplating about using an MVC pattern in my new project and I can clearly see the main advantage of being able to put the data layer (the model) a little closer to the presentation layer (the view), which will allow a little increase in application speed. But apart from performance stand point are there any other advantages of MVC over the view-logic-data layered type pattern? EDIT: For those who's interested I just uploaded a sample PHP code that I created to test the use of MVC. I purposly omitted all the security checks to make the code a little easier to read. Please don't

I read many articles talk about 3 tiers architecture in c# but i see that: Almost use Bussiness Logic Layer(BLL) as a object mapping corresponding table in database. This BLL object has some methods like these: + GetData() : return this; + Update(this) ; + Insert(this) ; + Delete(this) ; This BLL object calls corresponding DAL(Data Access Layer) to execute to corresponding table of database. I think if with above methods, we can oly get a record and update it. But if we have got many records and want to put it into a dataset, how can we update all records changed? Must we use loop for all

What is difference of developing a website in MVC and 3-Tier or N-tier architecture? Which one is better? What are pros and cons? They're pretty much the same, however in 3-Tier, the top level (presentation) never directly communicates with the bottom layer (data persistence). In model-view-controller, theoretically the Model is supposed to 'notify' the View that it has changed so that the View can update. However, this is usually not an issue in most web applications because they are stateless. I'm not sure if any well-known PHP MVC architectures have Views that directly communicate with

I went for an interview, and was asked to show up my Business layer architecture. I have some idea about 3 tier architecture but really no idea, to what to write in front of interviewer. So suppose my project deals with Employees of an organization, then what would i have written there. Will it be any kind of diagrams i should have made or some coding part. I worked in C# framework 3.5. I really don't understand what else to mention in this question, so please let me know if something is required.Thanks. Edit I worked in winforms. I know what Business layer is, but was not sure what to tell