- Explain caching in Drupal?
- Can you explain how the database system of Drupal works?
- What is a render array in Drupal?
- What is Drupal’s taxonomy system and what are some of its key features?
- Explain the concept of “nodes” in a Drupal system.
- What Are Hooks?
Are you trying to change your career in a better way by finding best job? Wisdom jobs take you on the right path to choose the best job you are searching for. Do you have a talent for Drupal? People who have Drupal skills and experience has plenty of employment options such as virtual employment and traditional jobs. Drupal is open source and CMS platform for web content management and great digital experiences. Drupal has wide database type support, Multisite, Multi languages, unlimited user roles and unlimited content type. Drupal jobs consist of many different positions as a web developer, web development consultant, digital media developer in many multinational companies in India and around the world. Drupal jobs interview questions and answers page designed by our professionals help you to overcome interview fear and to successfully clear it. Subscribe to www.wisdomjobs.com jobs portal to get latest job notifications on your email.
Drupal Interview Questions and Answers
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.
Explain how caching work in Drupal?Through caching Drupal allows to speed up website using different configuration like page caching, block caching and lifetime for cached pages.
Error Handling is a process of detection and finding the resolutions for the errors, this can be programming application errors or communicable errors. What is the use of twitter suffix option in advanced tab in druapl social networking?
It is used to set width of first sidebar and second sidebar and unit in % or px or em. What is the use of Media query for this layout field in the layout and general settings?
It defines the order status such as processing or pending or completed or cancelled. Which PHP compatibility is used for Drupal?
Drupal is a free and open source Content Management System (CMS) that allows organizing, managing and publishing your content. Why to use Drupal?
Media query defines different style rules for different media devices and by default for this layout will be 1025px. What is the maximum and minimum width for media query for Landscape tablet in tablet layout?
Toptal sourced essential questions that the best Drupal developers and engineers can answer. Driven from our community, we encourage experts to submit questions and offer feedback.
Name and describe the five conceptual layers in a Drupal system.
The five layers, starting from the bottom layer, are as follows:
What is Drupal’s taxonomy system and what are some of its key features?
Drupal comes with a built in taxonomy system that allows for categorization of the nodes on a site.
The taxonomy system allows for arbitrary definition of terms, as well as arbitrary organization of those terms into vocabularies. There is no limit to the number of vocabularies that can be created, nor is there any limit to the number of terms that can be included in a vocabulary.
A vocabulary can also have free tagging which means that, instead of entering specific terms ahead of time, users may enter tags freely at the time the content is created and those tags automatically become terms in that vocabulary.
Drupal’s taxonomy system is one if its most powerful and flexible features.
Describe the Field API that was introduced into core in Drupal 7.
The Field API allows custom data fields to be attached to Drupal entities and takes care of storing, loading, editing, and rendering field data. Any entity type (node, user, etc.) can use the Field API to make itself “fieldable” and thus allow fields to be attached to it. Other modules can provide a user interface for managing custom fields via a web browser as well as a wide and flexible variety of data type, form element, and display format capabilities.
The Field API defines two primary data structures, Field and Instance, and the concept of a Bundle. A Field defines a particular type of data that can be attached to entities. A Field Instance is a Field attached to a single Bundle. A Bundle is a set of fields that are treated as a group by the Field Attach API and is related to a single fieldable entity type.
For example, suppose a site administrator wants Article nodes to have a subtitle and photo. Using the Field API or Field UI module, the administrator creates a field named ‘subtitle’ of type ‘text’ and a field named ‘photo’ of type ‘’. The administrator (again, via a UI) creates two Field Instances, one attaching the field ‘subtitle’ to the ‘node’ bundle ‘article’ and one attaching the field ‘photo’ to the ‘node’ bundle ‘article’. When the node system uses the Field Attach API to load all fields for an Article node, it passes the node’s entity type (which is ‘node’) and content type (which is ‘article’) as the node’s bundle. field_attach_load() then loads the ‘subtitle’ and ‘photo’ fields because they are both attached to the ‘node’ bundle ‘article’.
Field definitions are represented as an array of key/value pairs.
Note that the above answer has been excerpted from the Drupal API Documentation, where more information can be found.
Apply to Join Toptals Development Network
and enjoy reliable, steady, remote Freelance Drupal Developer Jobs
Explain the concept of “nodes” in a Drupal system.
All content on a Drupal website is stored and treated as “nodes”. A node is any piece of individual content (e.g., a page, article, forum topic, blog entry, etc.). Note, though, that omments are not stored as nodes but are always connected to a node.
The ability to create different “content types” is a way Drupal allows you to have different kinds of nodes for different purposes. For example, an “article” is one content type, a “book page” is another, and a “blog entry” yet another. You can also create new content types of your own.
Treating all content as nodes provides a great deal of flexibility that facilitates and simplifies creating new types of content. It also makes it easy to apply new features or changes to all content of a particular type.
Describe the features and uses of the Views module.
Using the Views module, you can fetch content from the database of your site and present it to the user as lists, posts, galleries, tables, maps, graphs, menu items, blocks, reports, forum posts etc. Different content types including nodes, users, and other bundles can be displayed.
Views UI, a submodule within Views, provides a graphical interface underneath which lies a powerful SQL query builder that can access virtually any information in your database and display it in any format.
Different displays can present the query results as pages with fixed URLs on your site (or URLs accepting arguments), blocks, feeds, or panel panes.
You can also use Views to present related content or implement contextual filters. For example, you can display a list of users along with links to the content they have created and/or you can display customized content to a user according to their user ID.
More information is available in the Views documentation on the Drupal site.
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.
Explain the “hook” system in Drupal. How and why would you use it?
Drupal’s hook system is essentially a mechanism for implementing custom features without needing to make any modifications to the Drupal core. There are specific places where the Drupal core can invoke custom functions defined in modules to enhance the functionality of core. These places are referred to as “hooks” and have a well-defined interface.
Hooks make it possible, for example, for a module to define new URLs and pages within a site (hook_menu), to add content to pages (hook_block, hook_footer, etc.), set up custom database tables (hook_schema), and so on.
Let’s say you want to change the core “Contact” form. To do so, you can implement hook_form_alter in your custom module and provide any cuistom functionality that you’d like in that function. Drupal will check all form_alter hooks in all modules, so your hook will be picked up and your custom code will be applied to the “Contact Form”.
So overall, Drupal hooks are just functions defined per the Drupal standards that allow you to extend Drupal and alter or extend core functionality without modificing any core code.
There is more to interviewing than tricky technical questions, so these are intended merely as a guide. Not every “A” candidate worth hiring will be able to answer them all, nor does answering them all guarantee an “A” candidate. At the end of the day, hiring remains an art, a science — and a lot of work.
Tired of interviewing candidates? Not sure what to ask to get you a top hire?
Let Toptal find the best people for you.
Our Exclusive Network of Drupal Developers
Looking to land a job as a Drupal Developer?
Let Toptal find the right job for you.
Job Opportunities From Our Network
Submitted questions and answers are subject to review and editing, and may or may not be selected for posting, at the sole discretion of Toptal, LLC.
Stephen has been a software engineer for over 30 years. From developing software for the Unix platform in the 1980s to producing enterprise-level financial and eCommerce software on PHP, JS, and the C language family, he prides himself on being meticulous and developing high quality software. He is a dedicated, efficient individual and a great communicator, and looks forward to contributing valuable skills to your project!
With over a decade of experience behind him, Richard is a seasoned software engineer and manager—leading engineering and product teams to build multiple products in payment and eCommerce fields. He recently has served as the head of engineering for GO VIET, an Uber-like platform, and as a CTO of a fintech that he co-founded. Richard also has a solid CS background, so he’s passionate about software system architecture and cloud computing.
Vasil is a senior front-end developer with experience in building modern, fluid websites, and single-page applications with the most used frameworks. Working for a large US finance company as a lead developer has also given him the overall big picture of all the processes—not only development but also management and planning. His preferred working methodology is Agile.
Looking for Drupal Developers? Check out Toptal’s Drupal developers.
Toptal Connects the Top 3% of Freelance Talent All Over The World.
FAQ
What is the difference between Drupal 8 and Drupal 9?
- 1) Explain Drupal. …
- 2) What are some most commonly used PHP based CMS? …
- 3) Why Drupal is so popular and called a powerful framework? …
- 4) What are system requirements for Drupal installation? …
- 5) Explain Drupal’s features. …
- 6) What is module in Drupal?
What is the latest Drupal version?
What language is used in Drupal?
Supported until (at least) November 2023. Use this version for sites already running Drupal 7.
