Top 20 WordPress Theme Interview Question & Answers that You Should Know in 2023

WordPress Theme Interview Question & Answers

WordPress Themes are an integral part of the CMS. WordPress requires a theme to run its functions and features. By default, there is a theme added to every installation. In this post, we have collected the best 20 WordPress theme questions and answers to ease your career as a WordPress developer.

Best 20 WordPress Theme Interview Question & Answers 2023

Trying to pass an interview as a WordPress theme Developer? Here are the 20 most important and insightful interview questions that you must prepare.

1. What are WordPress themes?

A. WordPress themes are a set of files collection or templates that help you design the look and feel of your website. They provide you with a wide selection of design options, from minimalist to highly customized, so you can create a website that best reflects your brand and purpose. With thousands of themes available, you can easily find the perfect one to make your website look professional and inviting. There are both Free and Premium WordPress themes available to help individuals, business owners, and similar professionals to build online websites to represent their digital startups, e-commerce, and so on. 

2. What are WordPress template files?

A. WordPress template files define the layout, structure, and visual appearance of the website content from the database. They structure the visual presentation of the content on different pages such as the Home Page, Blog Posts, and Individual pages. 

There are several types of template files in WordPress, including:

Index.php – defaults templates to control the home page, archive page, and search results. 

Page.php – Controls the display of individual pages on a website.

Single.php – Controls the presentation of single blog posts.

Archive.php – Controls the display of archives files.

Header.php – Presents the header section of the website.

Footer.php – Controls the footer section of the website.

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

A. The functions.php in a WP theme is a template file. It contains custom PHP code that is further used to scale the functionality of the theme.

  • Add support for theme features.
  • Enqueuing scripts and stylesheets for the theme,
  • Creating custom shortcodes. 
  • Adding custom filters & actions.

4. What makes WordPress a popular content management system (CMS) for websites?

A. Several reasons make WP a top-tier Content Management System for websites.

  • It’s user-friendly. 
  • Highly customizable
  • Open source website builder and CMS. 
  • It’s SEO optimized. 
  • Secure
  • Community support while using & scaling.

5. What are the core components of a WordPress theme, and what are their functions?

A. The core components of a WordPress theme are:

  • Style Sheet: to define visual appearance.
  • Header: Sets up the header of the website. 
  • Footer: Defines the footer of the website. 
  • Sidebar: To design the Sidebar. 
  • Index: To show default content files on a website. 
  • Single: To display a single post. 
  • Page: Presentation of a single post. 
  • Archive: To show a list of posts divided into categories. 
  • Functions: To add new or modify old features. 
  • Template: To show specific content types. 

6. How do you ensure that a WordPress theme is optimized for search engines and provides a good user experience?

A.  To check whether a WP theme is optimized for a search engine or not, check the following factors. 

  • Mobile friendly
  • Fast page speed
  • SEO friendly
  • Easy Navigation
  • User Friendly
  • Clear Call to Action
  • Accessibility, and 
  • Security

7. What are the differences between a static website and a dynamic website built on WordPress?

A. A static website uses the database to show the content as they are written in the Database. In contrast, Dynamic websites use the database to store and retrieve content and present pages generated on the fly as a response to users’ calls. 

Here are the differences between static & dynamic websites.  

  • Dynamic Websites use CMS to update content, manage it, and create a consistent look. Static websites ask you to do all these manually. 
  • Dynamic Websites offer advanced interactivity such as social media but static websites don’t.
  • Dynamic Websites offer greater customization offers in comparison to static websites. 
  • Static websites are difficult to scale. On the other hand Dynamic website can easily scale itself. 

8. How do you test a WordPress theme for compatibility with different devices, browsers, and platforms?

A. Several ways are there to test the compatibility of your WP theme with different devices. Check them below. 

  • Test for responsiveness. 
  • Test for cross-browsing. 
  • Performance Test in different devices. 
  • User Experience Testing on different devices. 
  • Test for the Accessibility of the WP theme. 
  • Check for the security of the theme. 

9. What is the process for developing a WordPress theme from scratch, and what tools and technologies do you use?

A. Developing a completely new website theme is a complex process yet much rewarding for users. As this offers you better customization options & control over the functionality. You can design a new WP theme with this roadmap.

  • Plan your design first in your mind & paper. 
  • Set up Your website development environment and text editor. Use tools such as XAMPP, Flywheel, Sublime Text, Visual Studio Code, or Atom. 
  • Create a basic file structure including index.php, style.css, and functions.php. 
  • Define your header & footer. 
  • Build your template files. 
  • Add functionality with functions.php.
  • Test your theme. 

10. How do you ensure that a WordPress theme is accessible to users with disabilities and complies with web accessibility standards?


  • Choose a theme with accessibility guidelines WCAG 2.1. 
  • The theme must be compatible with assistive technologies. 
  • Check the color contrast.
  • Check for the Alt Texts feature in Images. 
  • Resizable Text feature. 
  • The theme must be navigable by keyword 
  • Provide a clear sitemap on the website. 
  • Do a speed test. 

11. How do you make a WordPress theme more secure and protect it from common vulnerabilities, such as SQL injection and cross-site scripting?


  • Keep all your plugins and themes up-to-date. 
  • Use only secured hosting. 
  • Implement secure coding practices. 
  • Use a secure plugin. 
  • Limit your user access. 
  • Disable file editing. 
  • Use HTTPS. 
  • Validate user input to prevent cross-site scripting. 

12. How do you maintain a WordPress theme over time, and what strategies do you use to keep it up-to-date and secure?

A. You must maintain your WP theme to keep it smooth and secure. 

  • Update your WP theme regularly. 
  • Use a child theme to save the customised changes. 
  • Backup your website. 
  • Monitor your website for security. 
  • Use a reputable theme. 
  • Remove unused themes & plugins. 

13. What are some best practices for designing a WordPress theme that is both visually appealing and easy to use?

A. Follow the below-given practices carefully to design a visually appealing and user-friendly WordPress Theme.

  • Make it simple. 
  • Use responsive designs.
  • Focus on the Typography. 
  • Under colour psychology. 
  • Ensure an easy navigation system. 
  • Optimise for speed. 
  • Test the theme.

14. What are the most common mistakes that WordPress theme developers make, and how can they be avoided?

A. Several developers fail to develop a WordPress theme as they make several common mistakes as follows. 

  • Not following the WP coding standards. 
  • Overuse of Plugins. 
  • Not optimising performance themes. 
  • Not making the theme responsive. 
  • Leaving the accessibility guidelines at the corner. 
  • Not securing the theme. 

15. What are the advantages of using a child theme in WordPress, and how do you create one?

A. A child theme inherits all the functionalities of its parent theme. It allows you to customise your website without affecting the parent theme. 


  • Easy Updates. 
  • Greater customization options. 
  • Safe Development

How to Create- 

  • Create a new folder in your WP theme directory. WP> Content > Themes. 
  • Create a new file named Style.css to add the necessary customization child theme codes. 
  • Create a new file named functions.php to enqueue the parent’s theme styles & scripts. 
  • Activate the theme from your WP dashboard.

16. What are WordPress hooks, and how can they be used to extend the functionality of a WordPress theme?

A. WordPress hooks are filters or predefined functions. They allow developers to modify the functionality or add custom functions to WP themes & plugins without making any changes to their core files. 

In other words, Hooks are building blocks of WP allowing developers to use them to meet certain specific needs.

17. How do you ensure that a WordPress theme is compatible with popular plugins, such as WooCommerce and Yoast SEO?

A. Ensuring compatibility with popular plugins such as WooCommerce & Yoast SEO is important to make your website a success. This way you can scale your business whether it is a content creation or a product/service selling website. 

  • Research the Theme’s documentation & features.
  • Cross-check the reviews. 
  • Test the theme’s functionality with popular themes. 
  • Use a plugin compatibility checker. 
  • Contact your theme developer for assistance.

18. What are the core components of a WordPress theme, and what are their functions?

A. The core components of a WordPress theme are as follows. 

  • Stylesheet: style.css
  • Template files. 
  1. Index.php
  2. Header.php
  3. Footer.php
  4. Single.php
  5. Page.php
  6. Archieve.php
  • Functions.php
  • Images & Media files. 
  • Java Scripts & other scripts. 

19. How do you ensure that a WordPress theme is optimised for search engines and provides a good user experience?

A. To ensure the optimization of a WordPress theme for search engines & better user experience, you can check the following factors. 

  • The coding of the theme must be well-written. 
  • It must be mobile-responsive. 
  • The theme should feature a clear structure. 
  • It should be SEO optimized. 
  • Check whether it supports Schema Markup. 
  • Easy customization should be its core power.


Prepare these questions & answers for your next interview round and chances of you getting selected will be much higher than before. All the best! 

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