Drupal classifies its content which is called taxonomy and is implemented in the core Taxonomy module.
Drupal Interview Questions
The Sections module allows applying different themes to different pages in a Drupal site.
Be default, Drupal doesn’t allow the insertion of PHP codes in its pages. To embed PHP codes, you need to activate a Drupal module called PHP filter. By default, this module remains disabled.
There are three ways to interact with Drupal search system by implementing: nodeapi (update index) hook_search() hook_update_index()
Hooks are Drupal API code which allows module to interact with Drupal core. Its module system is based on the hooks concept.
Drupal integrates well with external search engines such as Xapian, Apache solr if the built-in search engine does not meet your needs properly.
The template.php file in the theme directory allows you to override a theme function.
Drupal treats all the stored content on its web site as nodes. Any piece of content like blog, article, page, etc is considered as node. Although, the comments are not stored as nodes but they are always connected to a node.
The field API allows custom data fields to be attached to Drupal entities. Any entity type can use field API to make itself “fieldable” means allows fields to attach to it.
Data (nodes, etc) Modules Blocks and menus User permissions Themes and templates