Drupal Interview Questions and Answers

It is a very useful tool as it helps you perform various admin tasks using one or two commands in the terminal, replacing the need for many clicks and page refreshes in the UI. "DRUSH" is an awesome shell interface for managing Drupal right from our cloud server using command line.

Drupal consists of multiple layers for execution. Hence, caching is a vital aspect of Drupal to measure performance accurately.

Here are the various ways of caching in Drupal:

• DRUPAL INTERNAL CACHING
• CUSTOM CACHE USING DRUPAL’S CACHE API
• DRUPAL VIEWS CACHE:
• MEMCACHE
• OPCODE CACHE
• REVERSE PROXY - VARNISH
• BOOST Caching
• Using Content Delivery Networks(CDN)

It is a piece of individual content such as a page, poll and article. Most content on a Drupal website is stored/treated as "nodes".

To install JQuery in Drupal, follow these steps carefully:

• Start with downloading the jquery_ui Drupal module by using the stable version available (6.x-1.5). Now, move it to your modules folder (e.g. sites/all/modules/jquery_ui)
• Now, go to the jQuery UI and then download the "Legacy" 1.7.x version. Not the 1.8.x version or any other later branch!
• After completing the above step, inside a temporary directory, extract the directory "development-bundle" collected from the archive and finally rename it to "jquery.ui".
• After renaming, start copying the renamed directory, (jquery.ui) into the sites/all/libraries folder (create a separate folder like this if it should look like sites/all/libraries/jquery.ui.)
• Finally activate the jquery_ui module in Drupal version 8.

While there are many methods to enable Twig Debug, this is one of the easiest and simple way

• Step 1: Navigate to the \sites\default in the Drupal 8 dashboard.
• Step 2: Now, start the process by making a copy of the default.services.yml file and renaming it to services.yml (if services.yml does not already exist).
• Step 3: Next, open the file and search for this phrase 'twig.config'.
• Step 4: Once you’ve got the phrase, set the debug mode to true, auto_reload mode to true and cache to false mode.
• Step 5: Finally, go to the bottom of the file and copy the following code block as it is:

Parameters

twig.config:
debug: true

To create a theme in Drupal 8 from scratch, use the following steps:

• Create a theme folder inside Drupal 8 to store your theme in a .info.yml file and libraries file.
• Create the .info.yml file
• Create the .libraries.yml file.
• Start creating the stylesheets
• Now, create designs and then, you have your own theme in Drupal 8.

• New Theme Engine : It includes a brand new theming engine called Twig. It is PHP-based, flexible, fast, and secure.
• Drupal 8 is mobile first now
• It has extensive multilingual features right out of the box.
• It has configuration management built into it at the file-system level so that carrying over configuration elements in Drupal 8.
• Easy Authoring : It bring unprecedented power into the hands of the Content Editor, with WYSIWYG editor CKEditor now bundled with the core.
• Views Now Part of its Core :
• Better Support for Accessibility
• Web Services in-Built in Drupal 8
• In Drupal 8 it has Guided Tour
• JavaScript Automated Testing in Drupal 8
• Loading Speed improvement in Drupal 8.

Adding regions to a theme requires two things that's are given below :-

• Adding region meta-data to your THEMENAME.info.yml file.
• Please edit your page.html.twig file then print new regions.

Default Regions

• page.header
• page.primary_menu
• page.secondary_menu
• page.highlighted
• page.help (It has dynamic help text for admin pages)
• page.content (main content of current page)
• page.sidebar_first
• page.sidebar_second
• page.footer
• page.breadcrumb

It is a powerful core module, gives our sites use of the organizational keywords known in another systems as categories or tags, or metadata. Taxonomy allows you to connect, relate and classify your website's content. These terms are gathered within "vocabularies". It is the practice of classifying content.

It allows you to override a theme function. It is available in the theme directory.