WordPress Masters

Top 60 WordPress Interview Questions and Answers

WordPress has become one of the most popular content management systems used by organizations and individuals around the world. With its ease of use, extensibility, and active open source community, WordPress offers a powerful yet user-friendly way to build websites and blogs.

If you’re preparing for a WordPress job interview, you need to demonstrate your knowledge and experience with this versatile platform. Review these 100 WordPress interview questions and answers to get ready to ace your next interview.

WordPress Basics

 

1. What is WordPress?

WordPress is an open source content management system based on PHP and MySQL. It allows users to easily build and customize websites and blogs without needing to know code. Some key features include user roles, post types, taxonomies, widgets, themes, plugins, and more.

2. What are the main differences between WordPress.org and WordPress.com?

WordPress.org is the self-hosted, open source WordPress software that users download and install on their own web servers. This offers more control and customization options compared to WordPress.com.

WordPress.com is a free, hosted version of WordPress provided as a service. Users don’t have to worry about web hosting, updates, or technical configuration, but have less control over plugins, themes, and customization.

3. What are some benefits of using WordPress?

Benefits of WordPress include:

  • Open source with a large community of contributors
  • Easy to install and use
  • SEO-friendly out of the box
  • Extensible with plugins and themes
  • Regular updates and security fixes
  • Scalable for sites of any size
  • Includes user roles and permissions
  • Custom post types, taxonomies, menus
  • Active support forums and documentation

4. How does WordPress handle post revisions?

WordPress automatically saves revisions as drafts while you’re editing. It stores all changes made to content as separate versions, allowing you to compare revisions, restore past versions, and revert to older drafts if needed. The number of revisions kept can be adjusted in Settings.

5. What is a WordPress theme and how does it work?

A WordPress theme controls the look and feel of the website. It includes template files that display the various pages, posts, and archives in a particular design and style. Theme files are a collection of PHP files, stylesheets, JavaScript, images, and other assets. Switching the active theme will change the appearance of the site.

WordPress Installation

6. What are the server requirements to run WordPress?

The requirements to run WordPress include:

  • PHP version 7.4 or greater
  • MySQL version 5.6 or higher (or MariaDB equivalent)
  • Apache or Nginx web server
  • HTTPS support
  • PHP extensions like cURL, GD, MBString, ZIP, XML, ImageMagick
  • At least 64MB RAM for WordPress alone

7. What files and folders make up the standard WordPress directory structure?

The main folders and files that make up WordPress are:

  • wp-admin – For the admin backend and dashboard
  • wp-content – Stores themes, plugins, uploads
  • wp-includes – Core libraries and functions
  • index.php – Main WP front-end page
  • wp-config.php – Core config file
  • .htaccess – Rewrite rules
  • license.txt – License info
  • readme.html, wp-*.html – Basic site pages and info

8. What information is contained in wp-config.php?

The wp-config.php file contains essential configuration like:

  • DB credentials – DB name, user, password, host
  • DB table prefix
  • Secret keys and salts
  • DB character set
  • Authentication unique keys and salts
  • Filesystem path
  • Multisite network details
  • Memory limits and debugging settings

9. How can you increase WordPress memory limit?

To increase WordPress memory limit:

  • Edit wp-config.php to set WP_MEMORY_LIMIT constant to a higher value
  • Add php.ini memory_limit setting of 128M or 256M
  • Use a php.ini override in .htaccess to raise memory limit
  • Install a plugin like WP Total Memory Usage for admin settings

10. What are the recommended PHP settings for running WordPress?

Recommended PHP settings for WordPress include:

  • Memory limit of at least 64-128 MB
  • Post max size of 8 MB or more
  • Upload max filesize of 2-8 MB or more
  • Max execution time limit of at least 30 seconds
  • Output buffering enabled
  • Register globals off
  • PHP version 7.4 or newer

WordPress Dashboard and Administration

 

11. How do you access the WordPress admin dashboard?

To access the WordPress admin dashboard, append /wp-admin to the WordPress site URL. For example, www.yourdomain.com/wp-admin. You will be prompted to log in using your WordPress username and password.

12. What are the main sections in the WordPress admin dashboard?

The main sections in the WordPress dashboard are:

  • Home – Displays overview stats
  • Posts – Manage blog posts and content
  • Media – Upload and manage media files
  • Pages – Manage static pages and menus
  • Comments – Manage and moderate comments
  • Appearance – Customize theme and design
  • Plugins – Manage plugins
  • Users – Manage user accounts and roles
  • Tools – Import or export content, empty cache
  • Settings – Configure core settings

13. What are the five default user roles in WordPress?

The main user roles in WordPress are:

  • Administrator – Can manage entire site plus themes, plugins, users, tools, settings. Highest level of access.
  • Editor – Can publish, manage, edit posts and pages plus all content.
  • Author – Can publish and manage their own posts but not others’.
  • Contributor – Can write and manage their posts but cannot publish them.
  • Subscriber – Can only manage their profile. Lowest level of access.

14. How can you create a new user in WordPress?

To add a new user in WordPress:

  • Go to Users > Add New in the admin dashboard
  • Enter the username, email, first/last name
  • Select the user role from the dropdown
  • Optionally, generate a strong password
  • Click Add New User

An email with login info will be sent to the user.

15. How do you reset your admin password if you forgot it?

To reset your admin password:

  • Access phpMyAdmin and the WordPress database
  • Find the user’s row in the wp_users table
  • Click Edit and reset the user_pass field to a new password hash
  • Save changes then try logging in with the new password

Or use the Password Reset Plugin by installing it via FTP and accessing the reset page.

Managing Content in WordPress

16. What are the main post types available in WordPress?

The main public post types are:

  • Post – For blog posts and article content.
  • Page – For static pages and site pages.
  • Attachment – For uploaded media files.
  • Revision – For auto-saved post drafts.

Private custom post types can also be registered by plugins and themes.

17. How can you create a new WordPress page?

To create a new page in WordPress:

  • Go to Pages > Add New
  • Enter page title
  • Add page content using editor
  • Select parent page from dropdown (optional)
  • Publish page
  • View under Pages in dashboard

18. What are the differences between pages and posts in WordPress?

  • Pages are for static content while posts are for blog content.
  • Pages have no comments by default while posts do.
  • Pages use a Page template while posts use Post templates.
  • Pages appear in site navigation while posts don’t.
  • Pages have hierarchical structure, posts are displayed chronologically.

19. How can you create a hierarchical page structure?

To create a hierarchical page structure:

  • Create top level parent pages like ‘About’
  • Add child pages under these top pages like ‘About -> Team’
  • The parent for a child page can be selected when creating the page
  • View the page hierarchy using the Order setting

20. What are custom post types and taxonomies?

Custom post types allow defining new content types beyond the default posts and pages. Custom taxonomies allow categorizing and grouping these new custom post types.

For example, a ‘Product’ custom post type with ‘Product Category’ and ‘Product Tag’ custom taxonomies for an ecommerce site. These can be created using the register_post_type() and register_taxonomy() functions.

21. How can you create custom menus in WordPress?

To create custom menus:

  • Go to Appearance -> Menus
  • Click create a new menu, name it
  • Select pages, posts, links, categories to add as menu items
  • Enable and set primary menu location
  • Save the menu

Menus can be displayed using wp_nav_menu() function anywhere.

22. What are widgets in WordPress?

Widgets allow you to display information in widgetized areas like sidebars and footers. WordPress has built-in widgets and many themes and plugins provide custom widgets. Widgets can be managed under Appearance -> Widgets. Examples include calendars, text, archives, meta, menu, tag cloud.

23. How can you feature an image in WordPress post or page content?

To add an image in post/page:

  • Upload the image via the media library
  • Insert the image into the content using the Add Media button
  • Choose alignment, size, inserts as captioned image
  • Provides CSS classes for styling

24. What multimedia files formats are supported in WordPress?

WordPress supports the following multimedia files natively:

  • Images – JPEG, PNG, GIF, TIFF, BMP
  • Video – MP4, WebM, Ogg
  • Audio – MP3, OGG, WAV
  • Documents – PDF

Other file types can be supported using plugins.

WordPress Plugins and Extendibility

 

25. What are plugins in WordPress?

Plugins extend the functionality of WordPress by adding new features and custom functionality. Thousands of free and paid plugins can be downloaded from the WordPress repository. They can be searched and installed right from within the admin dashboard.

26. How can you install and activate a WordPress plugin?

To install and activate a plugin:

  • Go to Plugins > Add New
  • Search for the plugin
  • Click Install Now
  • Activate the plugin after installation
  • Configure plugin settings if any

27. What are must have WordPress plugins for any website?

Some must have WordPress plugins include:

  • Yoast SEO – For SEO optimization
  • Contact Form 7 – To add contact forms
  • Google Analytics – Integrate Google Analytics
  • Wordfence – Security and firewall
  • BackUpWordPress – For backups
  • Akismet – For spam protection

28. How can you manage and delete plugins in WordPress?

To manage plugins:

  • Go to Plugins > Installed Plugins
  • Activate/deactivate plugins
  • Click delete to uninstall
  • Use bulk actions to activate, delete multiple plugins

Take backups before deleting plugins.

29. What are WordPress hooks and filters?

Hooks and filters allow you to tap into WordPress events and modify data. Action hooks fire at specific points letting you execute custom functions. Filters modify content before it is saved or outputted. This allows extending and building on WordPress without editing core files.

30. What are custom post types and taxonomies?

Custom post types allow defining new content types beyond the default posts and pages. Custom taxonomies allow categorizing and grouping these new custom post types.

For example, a ‘Product’ custom post type with ‘Product Category’ and ‘Product Tag’ custom taxonomies for an ecommerce site. These can be created using the register_post_type() and register_taxonomy() functions.

WordPress Themes and Templating

 

31. What is the purpose of WordPress themes?

The main purposes of WordPress themes are:

  • Provide website design, layout, styling
  • Output markup for different template pages
  • Allow customization via theme options
  • Support for widgets in sidebars and other areas
  • Separate presentation from content
  • Allow using different themes to change site appearance

32. What files make up a basic WordPress theme?

The main files in a WordPress theme include:

  • style.css – Main theme stylesheet
  • index.php – Blog posts index
  • single.php – Single blog post template
  • page.php – Default page template
  • header.php – Site header template
  • footer.php – Site footer template
  • functions.php – Theme functions and settings
  • comments.php – Comments template
  • archive.php – Archives template
  • screenshot.png – Theme screenshot

33. What information goes in the comment header of style.css?

The comment header in style.css contains theme details like:

  • Theme name
  • Author name and URI
  • Description
  • Version number
  • Text domain
  • Tags
  • License details
  • Resources like CSS files

34. What are the recommended image sizes to use in WordPress?

Recommended image sizes include:

  • Thumbnail – Used in image galleries. 150×150 or 250×250.
  • Medium – Attachment pages or medium sized images. 300×300 or 500×400.
  • Large – Full size large image. 1024 or higher width.
  • Full – Full original image. No scaling applied.

Sizes can be registered using the add_image_size() function.

35. How can you create custom WordPress theme templates?

To create custom templates:

  • Make a page template like page-contact.php
  • Add Template Name header with name
  • Use get_header(), get_footer()
  • Override default page.php template
  • Create other templates like page-fullwidth.php

36. How can you modify or override parent theme templates in a child theme?

To override parent templates:

  • Create a child theme that extends parent
  • Copy templates from parent to child theme folder
  • Make changes to templates in child theme
  • Templates in child theme get priority and override parent

37. What functions are used to enqueue scripts and styles in WordPress?

To enqueue scripts and styles:

  • wp_enqueue_script()
  • wp_enqueue_style()

Place enqueues in functions.php.

  • Specify dependencies and version
  • Use wp_head() and wp_footer() hooks

38. What is the difference between get_template_part() and require()?

get_template_part() is used to include a template part in WordPress theme. It will locate the file from the child or parent theme.

require() simply includes and executes the specified file directly. It should not be used for including theme template files.

39. How can you make your custom WordPress theme translatable?

To make a theme translatable:

  • Use text domains on all output strings
  • Load .mo/.po translation files
  • Use __(), _e(), _x(), _n() for translations
  • Generate .pot file with translatable strings
  • Enable language support in functions.php

40. What is the purpose of functions.php in a WordPress theme?

functions.php is used to add custom functions and hook into WordPress in a theme. Typical uses:

  • Enqueue scripts and styles
  • Register menus, sidebars, custom post types
  • Add theme support for features
  • Implement hooks and custom functions
  • Load files, external libraries
  • Set WordPress constants

Advanced WordPress Concepts

 

41. How can you add custom WordPress rewrite rules?

To add rewrite rules:

  • Use add_rewrite_rule() function
  • Define rule regex, substitution, position
  • Flush rules for rules to take effect
  • Add rules to init action hook

For example:

 

add_action('init', 'custom_rewrite_rules');
function custom_rewrite_rules(){
  add_rewrite_rule('^expl/([^/]*)/?', 'index.php?page_id=$matches[1]', 'top');
}

42. What are transients in WordPress?

Transients allow you to temporarily cache and store data in the WordPress database between requests. The transient is automatically deleted after expiration time. Used to cache results from remote API requests or expensive database queries.

To use transients:

 

$value = get_transient( ‘key’ );

// If expired/not set
if( false === $value ) {

// Expensive operation
$value = slow_database_call();

// Cache for 1 day
set_transient( ‘key’, $value, 24 * HOUR_IN_SECONDS );

}

43. How can you allow shortcodes in WordPress text widgets?

To enable shortcodes in text widgets:

  • Add the filter: <!—->

 

add_filter('widget_text','do_shortcode');
  • This will interpret shortcodes like

    , [contact-form] in widget text.

 

44. What are custom fields in WordPress? (continued)

To use custom fields:

php

// Get custom field
$value = get_post_meta( $post_id, 'field', true );
// Add custom field
update_post_meta( $post_id, 'field', 'value' );
// Display fields in meta box
add_meta_box( 'fields', 'Fields', 'display_fields', 'post' );
function display_fields(){
// Output custom fields
}

Custom fields add flexibility for developers to store custom data without changing database schema.

45. How can you optimize WordPress sites for speed and performance?

Some WordPress performance optimizations:

  • Enable caching using a plugin
  • Minify and concatenate CSS/JS files
  • Optimize images and media
  • Use a CDN for assets
  • Deactivate unused plugins
  • Follow caching best practices
  • Avoid heavy queries and scripts
  • Use a more lightweight theme
  • Optimize the MySQL database
  • Enable GZIP compression
  • Leverage browser caching

46. What are some best practices for WordPress security?

WordPress security best practices:

  • Strong passwords and role management
  • Limit login attempts to prevent brute force
  • Update WordPress core and plugins
  • Avoid publically exposing wp-config.php
  • Disable file editing from WordPress admin
  • Use authorized OAuth for remote POSTs
  • Disable XML-RPC if not used
  • Scan for malware and change compromised passwords
  • Use strong SSL/HTTPS everywhere

47. What are some alternatives to WordPress?

Some alternatives to WordPress include:

  • Joomla
  • Drupal
  • Magento – Ecommerce focused
  • Wix – Drag and drop website builder
  • Weebly
  • Squarespace
  • Ghost – Blogging platform
  • Medium

48. How can you migrate an existing WordPress site to a new host or domain?

To migrate a WordPress site:

  • Install WordPress on new host
  • Use plugin like Duplicator to package files and database
  • Export database and download files via FTP/SFTP/SSH
  • Import database, add files to new site
  • Update wp-config.php values for new host
  • Run search replace on database for URLs
  • Update hardcoded URLs in files if needed
  • Test site and settings after migration

49. What are some must have skills for a WordPress developer?

Key skills for a WordPress developer include:

  • PHP programming and OOP
  • MySQL and database skills
  • HTML/CSS knowledge
  • JavaScript, jQuery
  • Version control with Git
  • REST API integration experience
  • Knowledge of plugins/hooks architecture
  • Understanding of templates and themes
  • Security and performance best practices
  • Debugging and problem-solving ability

50. What are some new features added in the latest version of WordPress?

Some new features in the latest WordPress 5.9:

  • Automatic plugin and theme updates
  • New widgets screen
  • Global styles customization
  • Pattern directory
  • Full site editing
  • Block theme support
  • Block patterns, style variations
  • Twenty Twenty-Three default theme
  • Editor layout options
  • Undo/Redo in customizer
  • Dashboard navigation menu

WordPress Interview Questions: Expert Level

51. How can you debug and log in WordPress?

To debug and log in WordPress:

  • Enable WP_DEBUG and WP_DEBUG_LOG in wp-config.php
  • Errors will display on-screen and get added to debug.log
  • Use error_log() and file_put_contents() for custom logs
  • Leverage debug tools like Debug Bar, Query Monitor, Log Viewer
  • Check PHP and server error logs
  • Use var_dump() and print_r() to inspect variables

52. How does WordPress handle caching?

WordPress has multiple levels of caching:

  • Object cache – Stores DB queries, external HTTP requests
  • Transients – Simple key-value store for cached data
  • Post meta cache – Caches post meta fields
  • Fragment caching – Cache portions of output
  • Page cache – Entire page output caching
  • CDN for media assets

Plugins can also implement caching systems.

53. What is nonce security in WordPress and how does it work?

WordPress nonces are unique one-time tokens used to verify intent and prevent CSRF attacks.

When generating forms, nonces are added to the action URL. On form submission, WordPress checks if the submitted nonce matches the generated one to verify the request is authorized. Any request without a valid nonce will get rejected.

54. Explain the WordPress database structure.

Some key WordPress database tables are:

  • wp_posts – Stores all posts, content and metadata
  • wp_postmeta – Post metadata and custom fields
  • wp_terms – Terms like categories and tags
  • wp_term_taxonomy – Term taxonomy and relationships
  • wp_term_relationships – Relates posts to taxonomies
  • wp_comments – Stores all the comments
  • wp_users – User accounts and usermeta
  • wp_options – Stores site options and settings

There are also tables for links, terms, taxes, comment meta etc.

55. How can you run multiple WordPress installations on a single server?

To run multiple WordPress sites on one server:

  • Use a separate database for each site
  • Install WordPress in a subfolder like example.com/site1
  • Set a unique table prefix via wp-config.php for each site
  • Use separate app pools or accounts where possible
  • Leverage caching and performance optimization
  • Monitor resource usage and configure server limits

56. What are the disadvantages of using WordPress?

Some potential disadvantages of using WordPress:

  • Can be resource intensive for large scale sites
  • Often needs plugins and custom code for complex logic
  • Sites can slow down without proper optimization
  • Have to manually update core, plugins, themes for security
  • Difficult to customize and extend compared to custom code
  • Limited control if using WordPress.com hosting

57. How can you embed custom data in each WordPress page?

To embed custom data:

  • Use the wp_head action hook
  • Call a function to output custom meta tags, schema, etc
  • Values can come from options or external sources
  • Can make dynamic using is_page(), content_url() etc
  • Useful for SEO microdata, Facebook tags, Pinterest images etc

58. What are some best practices when working with a WordPress theme and child themes?

Best practices with WordPress themes:

  • Avoid modifying core theme files directly
  • Use a child theme to safely make changes
  • Only override parent template files in child theme
  • enqueue scripts and styles properly
  • Make child themes portable and reusable
  • Use version control like Git
  • Follow WordPress coding standards and documentation

59. Explain the plugin development architecture in WordPress.

Main components of a plugin:

  • Main plugin PHP file with header docs, hooks
  • add_action() and add_filter() for integrating plugin
  • Settings pages using Settings API and option values
  • Custom post types, taxonomies, shortcodes if needed
  • Hook into actions and filters
  • Follow proper security practices
  • Use namespaces and autoloading for organization
  • Follow WordPress plugin development guidelines

60. How can you migrate a WordPress multisite network?

To migrate a WordPress multisite:

  • Backup main site database
  • Backup each subsite database and files
  • Set up new multisite on destination server
  • Import main site database
  • Import subsites as new networks
  • Copy over wp-content and other files
  • Update paths in wp-config.php
  • Perform search and replace on URLs
  • Reconfigure any custom domains
  • Test network functionality

Conclusion

I hope these WordPress interview questions and answers have given you a comprehensive guide to prepare for your next big WordPress job opportunity. Mastering both the technical and conceptual aspects of how WordPress works will help you succeed.

In your interview, focus on demonstrating your hands-on experience building with WordPress along with best practices you follow. Highlight your ability to troubleshoot issues, work with clients, and quickly learn new things as that is key for any developer role. All the best! 

Our Courses

WordPress Training

We offer live online training for WordPress, as well as offline training in Hyderabad.

Rate this post
Open chat
1
Scan the code
Hello 👋
Chat with us Now