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Drupal Interview Questions and Answers

1
Explain what is Drupal?

Drupal is a Content Management System (CMS). It’s an open source content and free CMS framework written in PHP. It enables you to organize, manage and publish content with ease and comes with a variety of customization option.

2
Name and describe the five conceptual layers in a Drupal system.

The five layers, starting from the bottom layer, are as follows:

  1. Data (nodes, etc.). Before anything can be displayed on the site, it must be input as data.
  2. Modules. Modules are functional plugins that are either part of the Drupal core or are contributed modules that build on Drupal’s core functionality.
  3. Blocks and menus. Blocks can be used to present anything, so just about any piece of content on a Drupal site (other than main content, breadcrumbs, and primary/secondary menus) is usually a block. Blocks are an extensible core feature of Drupal with a simple API provided by the block module. Blocks are similar to “widgets” in content management systems, but are highly generalized. Menus are a collection of links (menu items) used to navigate a website. The Menu module provides an interface to control and customize the menu system that comes with Drupal. By default, new menu items are placed inside a built-in menu labeled Navigation, but administrators can also create custom menus.
  4. User permissions. User permissions are defined for various roles and users are assigned to these roles in order to grant them the defined permissions.
  5. Themes and templates. The top conceptual layer of the drupal architecture is the theme. This consists primarily of XHTML and CSS, with some PHP variables intermixed, so Drupal-generated content can go in the appropriate spots. Also included with each theme is a set of functions that can be used to override standard functions in the modules in order to provide complete control over how the modules generate their markup at output time. A theme may contain one or more templates, depending on the complexity of the site and the way it has been designed.
3
List out the SEO modules available in Drupal?

Some of the SEO modules available in Drupal are

  • Pathauto
  • Meta tags/ Node words
  • Service Links
  • Google Analytics
  • Related Links
  • Search 404
  • Site map
  • Url list
4
What are appropriate use cases for Drupal as opposed to a lower-level framework like Ruby on Rails?

Rails is a general purpose web application framework for Ruby. It’s designed to help programmers be more productive in building web sites of all types, not just CMSs. And note that it’s for “programmers”. Unless you intend to write server-side code, you can’t hope to get much done with just Rails alone (but if you do intend to write code, both Ruby and Rails are known to be very productive).
Drupal is a Content Management System, of which there are hundreds. It happens to be written in PHP, but it’s modular design and large collection of available modules and themes make it possible to design and implement a large variety of web sites without writing a line of code. Most importantly, though, it is fundamntally a CMS. The further your site’s needs are from the CMS sweet-spot, the less likely it is that Drupal will be your best choice.

5
Why Drupal is considered powerful CMS compare to other CMS system?

Using content construction kit Drupal allows you to create multiple content types without any programming skills. And for each content type it allows customize theme template. You can have an article, story, slideshow, content type and so on.

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