MVC architecture in Rails - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does MVC stand for in Rails?

MVC stands for Model-View-Controller. It is a design pattern that separates an application into three main parts to organize code and responsibilities.

beginner

What is the role of the Model in Rails MVC?

The Model handles data and business logic. It talks to the database, stores data, and enforces rules about the data.

beginner

What does the Controller do in Rails MVC?

The Controller receives user input, talks to the Model to get or change data, and decides which View to show next.

beginner

What is the purpose of the View in Rails MVC?

The View displays data to the user. It shows the user interface and presents information from the Model in a readable way.

intermediate

How do the Model, View, and Controller interact in Rails?

The Controller gets user requests, asks the Model for data or updates, then passes data to the View to display. The View shows the data, and the cycle repeats with new user actions.

In Rails MVC, which component directly communicates with the database?

A Model

B View

C Controller

D Router

The Model handles data storage and retrieval from the database.

Which MVC part in Rails is responsible for deciding which page to show next?

A Helper

B View

C Model

D Controller

The Controller processes user input and chooses the View to render.

What does the View in Rails MVC mainly do?

A Store data

B Display data to users

C Handle user input

D Manage database connections

The View presents data to the user in a readable format.

Which MVC component in Rails contains business rules and validations?

A Model

B View

C Controller

D Asset Pipeline

The Model enforces business logic and data validations.

In Rails MVC, what triggers the Controller to act?

A View rendering

B Database changes

C User input or requests

D Background jobs

User actions like clicking links or submitting forms send requests that the Controller handles.

Explain the responsibilities of each part in the Rails MVC architecture.

Think about who talks to the database, who decides what to show, and who shows it.

Describe how a user request flows through the MVC components in a Rails app.

Follow the path from user action to what they see on screen.