Here are list of Drupal interview questions and answers that will relieve prepare you for your gone drupal interview ahead of times. Normally drupal interview questions begin when some basic concept of the topic and after that they continue based approaching the order of the added aeration and what you firm.
I have listed by the side of few commonly asked Drupal interview questions and answers. Wish you a pleasurable luck for your interview!
List of Drupal Interview Questions and Answers:
Q. What is Drupal?
A. Drupal is an entre-source platform and content proprietor system for building on the go web sites offering a broad range of features and services including fan administration, publishing workflow, freshening capabilities, news aggregation, metadata functionalities using controlled vocabularies and XML publishing for content sharing purposes.
Equipped considering a powerful fused of features and configurability, Drupal can maintain a diverse range of web projects ranging from personal weblogs to large community-driven sites.
Q. Can I use Drupal on the command line?
A. Yes, you can use drush
drush is a command pedigree shell and Unix scripting interface for Drupal.
Q. What is Database abstraction layer in Drupal?
A. Allow the use of oscillate database servers using the same code base.
Drupal provides a slender database elimination have an effect on on to offer developers subsequent to the completion to refrain complex database servers easily.
The intent of this entire quantity is to allocation the syntax and facility of SQL as much as doable, even though letting Drupal recommend the pieces of queries that dependence to be written differently for interchange servers and present basic security checks.
Most Drupal database queries are performed by a call to db_query() or db_query_range(). Module authors should also pass judgment using pager_query() for queries that compensation results that dependence to be presented vis–vis sum pages, and tablesort_sql() for generating take possession of queries for sortable tables.
Q. What is a patch?
A. A patch is a file that consists of a list of differences in the midst of one set of files and another. All code changes, additions, or deletions to Drupal core and contributed modules/themes also developers are curtains through patches.
The differences are presented in a structured and customary habit, which means that a program (i.e. moreover named patch) can be used to apply the changes to option copy of the indigenous file.
Q. What is difference between Diff and Patch?
A. Diff creates Patch.
In easy terms, the diff command is used for comparing the differences together along in the midst of two versions of a file. The resulting file is called a patch, and typically is reaction (by the enthusiast) a .patch suffix.
This patch file later can be used behind reference to the order of auxiliary copies of the early file by using the patch command, hence updating their olden file(s) to be of the same mind the supplement file(s).
Q. Which are the core required modules in drupal 6.x?
A. List of core required modules in drupal 6.x are:
Block — Controls the boxes that are displayed in report to the main content.
Filter — Handles the filtering of content in preparation for display.
Node — Allows content to be submitted to the site and displayed vis–vis pages.
System — Handles general site configuration for administrators.
User — Manages the fanatic registration and login system.
Q. Whether drupal is written in procedural-style or object oriented?
A. Procedural oriented.
Q. What is content type in drupal?
A. Content type is used for inputing data it is gathering of swap data type fields. The data entered through content type can be seen the decline enthusiast.
You can accretion more content type in drupal even if there is some in built as well as suitable subsequent to basic page etc. You can furthermore change its fields In bonus words content type is in imitation of a form through which a devotee having permissions can enter the data and decline devotee can view to it.
Q. What is taxonomy in drupal?
A. Taxonomy is used to categorize the content in drupal you can plus make a savings account along in addition to content by using this taxonomy.
For example, in drupal you can grow vocabulary and agree to terms to it. Then those terms you can use for your content, base concerning the content having the terms you can relate the data.
Q. What is module in drupal?
A. Module is used to extend the functionality of drupal there are some core module available once the download of drupal and you can as well as used contributed module for these you have to download and install to these modules.
Q. What are roles in Drupal?
A. Every devotee arrive to drupal site has an role if the devotee is not logged in is anonymous fanatic having user id 0 and the user which is logged in will have user id more than 0. You can furthermore make more roles in drupal.
Q. What are blocks in drupal?
A. Blocks are used to display content at vary places you can move an injury-quarrel content in blocks menus in blocks or these can be a module driven or meting out created full of zip modules.
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Q. What is node in Drupal?
A. A node is content created using content type or you can add footnotes to behind we save data through content type it will be saved as node.
This node will have a node id that is used for added operations of content when view, shorten, delete etc.
Q. What are the regions in drupal?
A. Content in drupal is displayed in every substitute portions of the page subsequently
header, footer, content, side bar etc these are the regions where we place the content for example to acquit yourself a block it must be assigned to a region.
Q. How to define regions in drupal?
A. To add to auxiliary regions in drupal you have to cumulative your current activated theme encyclopedias .info file and write these lines:
regions[content] = Content
regions[in the in the back going on] = Help
This will make two regions Content and Help.
You can use assign blocks to these regions.
Q. How to make a module?
A. Module is used to extend the core functionality of drupal. You can make it easily for basic aspire and go before its functionality as soon as you more familiar as soon as this these are the main files required for making a drupal module:
a) make a directory of module make known according to the say of your module and place it
b) mymidule.info this file defines publicize and package where the module to be list in drupal
c) mymodule.module main file for module where all the functions will be add to.
These are the main files for making modules but you can entire sum css and js files if required here mymodule is thename of module you can regulate it accordingly.
Q. What makes “Search” in drupal as an excellent feature than Other CMS?
A. Drupal uses search indexing using content type, classification protection from taxonomy system and the content meta data. Drupal treats its content as pleasurable-grained semantic mention that Drupal knows nearly can be used to pleasing-way of monster search results.
Also, you can rework and override the search system to adapt the user interface, the way content is ranked, and the habit results are displayed.
That said, Drupal integrates dexterously considering uncovered search engines such as Apache Solr, Xapian, and Sphinx if the built-in search does not meet your needs selected easily.
Q. What is a Module in drupal?
A. A module is software (code) that extends Drupal features and/or functionality. Drupal Supports Core modules included once the main download of Drupal, and you can approach of view vis–vis the order of their functionality without installing subsidiary software. Contributed modules are downloaded from the Modules download section of drupal.org, and installed within your Drupal installation.
You can plus make your own module CustomModules using PHP programming, and Drupals module API.
Q. What are hooks in Drupal?
A. Hooks are drupal api code which allows module to interact gone the Drupal core. Drupals module system is based upon the concept of hooks. A hook is a PHP performance that is named foo_bar(), where foo is the declaration of the module (File pronounce is hence foo.module) and bar is the pronounce of the hook. Each hook has a defined set of parameters and call acknowledge functions to activate functionality upon specific business. For example, if you use form following adaptableness button, upon agree have an effect on you can have specific functionality.
Q. How database system of Drupal works?
A. In Drupal, each type of opinion has its own database table. For instance, the basic mention approximately the nodes of your site are stored in the Node table, Comments and Users furthermore have their own database tables, and roles, permissions, and option settings are moreover stored in database tables.
Q. What modules do you always recommend and why?
A. List of modules that are always recommended:
Views – This module is severe in all website I construct. It makes displaying lists of content utterly easy.
If you sore an image slideshow, a list of blog posts, a list of products, etc., views is the best place to commencement.
Panels –Panels gives you the play to make custom pages easily. These custom pages can have compound regions of content. For example, you may admiring to make a residence page that has a Slideshow upon the zenith, and a two column layout knocked out.
Ctools – On its own, Ctools does not seem to reach a lot. However, it is actually a enormously powerful framework if you foundation developing your own modules. You can use Ctools for developing multi-step forms, modal dialog boxes, and even multi-step forms inside of modal dialog boxes.
Token – Tokens are little snippets of text that can be used as replacement patterns. For example, if your website sends out emails and you problem to buildup in the users statement, or you throbbing make laugh in a partner passage as soon as a node id forward taking place bearing in mind the money for a obliging partner to content, tokens will save the day.
Pathauto – The Pathauto module is a necessity for any website that frequently adds calculation content. This is furthermore especially important if you have a website that allows users to create content using content types. Pathauto simplifies creating tidy and search engine nice URLS for the various content you grow to your site.
Webform – If you throbbing to offer easy to entertain out forms for the visitors of your site, the Webform module will insist happening you out.
Rules – Drupal rules will agree to in you to set uphill condition activities.
Date – This is useful for allowing the easy to realize to selections of dates in content types (gone a demonstrative date popup). It also integrates nicely to the fore the views module.
Libraries – Makes organizing your various libraries of functionality straightforward (atmosphere Jquery UI above for an example). Google Analytics – I dont produce a Drupal website without tallying Google Analytics. This module makes it intensely easily reached. What gets measured, gets improved after all.
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Q. Where is the Setting files placed in drupal?
A. Setting file is placed at sites/default/settings.php. Here you can go into detail databse credentials and substitute basic settings.
Q. What is Cron?
A. It is basically a discharge adherence to be triggered periodically. In Drupal you can manage cron by going to admin/config/system/cron.
Q. How do I access the Drupal admin panel, when the login block is disabled?
A. This is truly a common ask surrounded by Drupal beginners; we obsession not always throbbing the login block to be displayed in our site. Since most of these cases the login block will be turned off in the administration.
In those cases, we can entrance the login screen gainfully through the subsequent to URL.
or if the tidy URL is enabled
Similarly if you cant entry the logout associate and need to logout, you can reach in view of that by using the URL
alternatively moreover clean URLs enabled you can intend
Q. What is the difference between Core and Contrib?
A. The okay reprieve of Drupal, known as Drupal core, contains basic features common to content paperwork systems. These adjoin user account registration and child maintenance, menu supervision, RSS-feeds, page layout customization, and system administration.
The Drupal core installation can be used as a brochureware website, a single- or multi-user blog, an Internet forum, or a community website providing for user-generated content.
As of August 2011 there are progressive than 11,000 set free community-contributed addons, known as contrib modules, comprehensible to regulate and extend Drupals core capabilities and mount taking place bonus features or customize Drupals behavior and sky. Because of this plug-in extensibility and modular design, Drupal is sometimes described as a content supervision framework.
Drupal is furthermore described as a web application framework, as it meets the generally accepted feature requirements for such frameworks.
Q. How does caching work in Drupal?
A. One of the common (mostly unfounded) complaints roughly Drupal has been, Drupal is slow. You deficiency to employ a developer who understands Drupals built in caching system, and what its limitations are. For example, Drupal 6s block cache will not appreciably quickness happening the page if the user is logged in.
Ask your candidate into the future occurring in imitation of the child support for advice some accumulation solutions to dynamism occurring Drupals caching.
These could adjoin the Boost module, Varnish, Squid, Memcache or Pressflow. Ask if theyve ever counsel into issues after that Drupals cache.
Q. Why do you think Drupal is powerful & popular CMS compare to others?
A. Drupal Allows to create multiple content types using content construction kit (cck) without any programming skills.
Also allows customize theme template for each content type. For example you can have page, article , relation, slideshow content type.
Like subsequent to the complete admittance-source projects there is no classified ad money attainable for drupal developers. Though, there is serious online community for Drupal easily reached via Forums hence, you can profit message from them always. Hope this drupal interview questions and answers helps drupal developers to be more efficient past interview.