CC313 Lesson 4 Set 4 — Comparisons and Application Flow

MVC Login Example

The View displays the login form; the Controller handles the login request; the Model represents user data and rules.

Three-Tier vs. MVC

Three-tier describes broad system layers; MVC describes how application responsibilities are organized.

Can Three-Tier and MVC Be Used Together?

Yes. An application may use three-tier architecture and MVC at the same time.

Tracing a User Action

A user action passes through the interface, controller or backend, model or data access, and then returns a response.

View Grades Example

A student clicks View Grades; the frontend sends the request, the backend processes it, data is retrieved, and the result is returned.

Frontend Does Not Mean HTML Only

Frontend refers to user-facing interaction, not just one programming language or markup technology.

Backend Does Not Mean Database

Backend includes processing, business rules, and services, not merely database storage.

Server Misconception

A server is a role that provides a service; it does not necessarily mean one physical computer.

Architecture Misconception

Software architecture is the organization of responsibilities and relationships, not merely drawing diagrams.

Online Food Ordering Frontend

Menus, food listings, buttons, forms, cart display, and order status shown to users.

Online Food Ordering Backend and Database

The backend processes orders and business rules; the database stores products, accounts, orders, and related information.

Main Software Architecture Takeaway

Architecture organizes application parts; clients request services, servers respond, frontend handles interaction, backend processes requests, three-tier separates layers, and MVC separates Model, View, and Controller.