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

Using `resource: 'book'` in the Grails URL mappings DSL automatically maps all standard RESTful HTTP verbs to the corresponding controller actions.

Question 2

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

Accepted Answer

@Responds

Answer

The `@Responds` annotation (combined with `respond()`) declares the content types a controller action can return, enabling content negotiation including JSON.

Question 3

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

Accepted Answer

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

Answer

`params` in a Grails controller is a map containing all incoming request parameters from the query string and request body.

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

The `redirect` method sends an HTTP 302 (or 301) redirect response to the client, instructing the browser to request the specified action URL.

Question 5

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

Accepted Answer

TagLib

Answer

A Grails TagLib (Tag Library) class lets you define custom GSP tags accessible as `<g:tagName>` or with a custom namespace in views.

Groovy and Grails Practice Test

Groovy and Grails Practice Test

Groovy and Grails Groovy and Grails Web Development & MVC 2