Ruby on Rails Ruby on Rails MVC Architecture & Routing 2

Question 1

In Rails routing, what does `root 'pages#home'` specify?

Accepted Answer

The default route for the application's root URL '/'

Answer

`root 'pages#home'` maps the root URL (/) to the `home` action in the `PagesController`.

Question 2

How do you create a named route helper in Rails that generates a URL like `/about`?

Accepted Answer

get '/about', to: 'pages#about', as: 'about'

Answer

The `as:` option in a route definition creates a named route helper (e.g., `about_path` and `about_url`).

Question 3

What Rails convention determines which view template is rendered by default when no explicit `render` call is made?

Accepted Answer

The view matching the controller name and action name

Answer

Rails implicitly renders app/views//.html.erb when no explicit render is called.

Question 4

Which HTTP verb does Rails use for the `update` action in a RESTful resource by default?

Accepted Answer

PUT or PATCH

Answer

Rails maps the `update` action to both PATCH (preferred) and PUT HTTP verbs for RESTful resource routes.

Question 5

What is the role of the View layer in Rails MVC?

Accepted Answer

Presenting data to the user as HTML or other formats

Answer

The View is responsible for presenting model data to the user, typically as HTML using ERB or other template engines.

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