Ruby on Rails Technology & Digital Applications 3

Question 1

In Rails, which tool is commonly used to run JavaScript and CSS bundling in a modern asset pipeline?

Accepted Answer

jsbundling-rails with esbuild, rollup, or webpack

Answer

Rails 7 introduced `jsbundling-rails` to integrate modern bundlers (esbuild, rollup, webpack) into the asset pipeline.

Question 2

What does the `turbo_method: :delete` option do in a Rails link helper?

Accepted Answer

Sends a DELETE request via Turbo instead of a standard anchor GET request

Answer

Since HTML anchors only support GET, `turbo_method: :delete` makes Turbo intercept the click and send a DELETE HTTP request.

Question 3

Which Rack middleware does Rails include by default to protect against Cross-Site Request Forgery?

Accepted Answer

ActionDispatch::RequestForgeryProtection via ApplicationController

Answer

Rails includes CSRF protection via `protect_from_forgery` in ApplicationController, embedding an authenticity token in forms.

Question 4

When using Rails with a React frontend (API mode), which gem helps configure CORS headers?

Accepted Answer

rack-cors

Answer

The `rack-cors` gem adds Cross-Origin Resource Sharing headers to Rails API responses, allowing browsers to make cross-domain requests.

Question 5

How does Rails 7's importmap-rails gem differ from webpack-based asset bundling?

Accepted Answer

It uses browser-native ES module imports without a build step

Answer

Import maps let modern browsers load ES modules directly from URLs, eliminating the npm/webpack build step entirely.

Ruby on Rails Practice Test