Groovy and Grails Groovy and Grails Web Development & MVC 2

Question 1

How do you define a RESTful resource in Grails URL mappings?

Accepted Answer

"/books"(resource: 'book')

Answer

restful "/books" to BookController

Answer

"/books" REST BookController

Answer

resource('/books').controller(BookController)

Question 2

Which Grails annotation marks a controller action to respond with JSON automatically when requested?

Accepted Answer

@Responds

Answer

@JsonResponse

Answer

@RestController

Answer

@ResponseBody

Question 3

What does `params` refer to inside a Grails controller action?

Accepted Answer

A map of request parameters (query string + form data)

Answer

The list of controller actions

Answer

The currently logged-in user's attributes

Answer

The application configuration map

Question 4

In Grails, what does `redirect(action: 'index')` do inside a controller?

Accepted Answer

Sends an HTTP redirect response to the index action URL

Answer

Renders the index view in-place

Answer

Forwards the request server-side to index

Answer

Reloads the current page

Question 5

Which Grails artifact is used to create reusable custom GSP tags?

Accepted Answer

TagLib

Answer

Service

Answer

Helper

Answer

Decorator

Question 6

What is the purpose of the `flash` scope in a Grails controller?

Accepted Answer

To store data that persists for one additional request after a redirect

Answer

To cache static assets

Answer

To encrypt session cookies

Answer

To send WebSocket messages