WordPress Theme Development Interview Questions & Answers

Looking for WordPress Interview Questions & Answers about WordPress Theme Development, Here is the list of Most Commonly Asked Interview Questions with their answers explained.

#1. What is WordPress Themes?

WordPress theme defines the look and appearance of your website at the front-end, controls the website’s functionalities and workflow, and store the data at the backend.

A WordPress theme is a group of files, which contains different types of files like stylesheets files, templates files, Images and theme’s functionality related files, etc.


#2. Can I use different layouts in a WordPress theme to display content?

Yes, you can use different layouts in a WordPress theme. You can simply create different layouts for different page templates in a theme.

For Example
Responsive Layout, Full-Width Layout, Page with Sidebar, Page without Sidebar, Different layout for category page, Different Layout for any specific page, Product listing layout for eCommerce website, Product detail layout…etc.


#3. What are the necessary files to create a WordPress theme?

As I said earlier, A WordPress theme can have different and multiple files based upon their layouts, appearance, and functionalities. But At the most basic level, you should have these files to create a WordPress theme.

index.php – Which is the main template file.
styles.css – Which is the main stylesheet file.
functions.php – Contains functions and theme’s programming stuffs.


#4. What are the template files in WordPress Themes?

A WordPress theme is built with the template files. A template file contains HTML tags, PHP code, and Template Tags.

Template files control how your site’s content to be displayed and how it should look.

A WordPress Theme can have different types of template files like Page templates, Category templates, Archive templates, Custom page templates, Custom post template …etc.

Page Template will only apply to the pages, Category Template will only apply to the category page and same goes with others template files.

If there is no template file, then by default index.php will be used to display the content.


#5. What are the Template Tags?

Template tags in WordPress, are the pre-built functions. We can use these functions to retrieve the data from the WordPress database and display within a template file or anywhere in the theme.

Eg:

the_title() – display the title of a page or post.
the_excerpt() – display the summary of a page or post.
the_content() – display the content of a page or post.
the_permalink() – display the URL of that page or post.


#6. What is the template partials?

A template partial is also a template file with a small piece of content, that we use to include within another template file.

Eg: We can create separate templates for header, footer or sidebar and then can include these template files or template partials within our main template file.

header.php – To generate the site’s header
footer.php – To generate the site’s footer
sidebar.php – To generate the site’s sidebar


#7. What are the most common template files in a WordPress Theme?

In a WordPress theme, there can be multiple template files based upon the design and functionality of that WordPress theme. But here is the list of some of the most common WordPress template files.

header.php – This is the header template file, which contains the site’s headers, meta info, title, etc.

footer.php – This is the footer template file, which contains the site’s footer info.

index.php – This is the main and most required template file of a WordPress theme. each theme should have this file.

style.css – This is the main and required stylesheet file which controls the design and looks of your site.

comments.php – This is comment template file.

page.php – This is the page template file, which is used when someone requests a page.

single.php – This is the single post template file, which is used when someone requests a single post.

category.php – This is the category template file, which is used when someone requests category page

archive.php – This is the archive template file, which is used when someone request archives page.

404.php – This is the page not found template file, which is used when WordPress not found any post or page or any user requested query.

These are the most common template files, that we can use to create a WordPress theme. Also, there are some other template files, that we can use to create WordPress theme according to the designs, layouts, and functionalities.


#8. What is post type in WordPress?

In WordPress, Post Type is a type of content. WordPress has different types of content and each content has its own post type.
Example:

  1. Posts has its own post type ‘post’.
  2. Pages has its own post type ‘page’.
  3. Attachments has its own post type ‘attachment’.
  4. Revisions has its own post type ‘revision’.
  5. Navigation menu has its own post type ‘nav_menu_item’.
  6. etc..

#9. What are the default post types in WordPress?

WordPress comes with 5 default post types, each one has its own post type.

  1. Posts
  2. Pages
  3. Attachments
  4. Revisions
  5. Navigation Menu

#10. What is the custom post types in WordPress?

Apart from the default post types, When we create a new post type it’s called custom post type. By using custom post types, we can create our own post types.


#11. What is the loop in WordPress?

The Loop in WordPress is the default way of retrieving data from the database then extract that data for each post and then displaying that data according to the template_tags or theme’s instruction.


#12. What is the use of functions.php file, why we use it?

A functions.php is a file, by using this file we can add or edit functionalities in our theme. This file works as a plugin. We can call any pre-built or custom-built functions within this file to add or modify any features in our theme.


#13. What are the Conditional Tags in WordPress?

Conditional Tags in WordPress are the pre-built functions, that we use to display content or perform any action within a specific condition.

Example:

is_home(); – this will check for home page.
is_single(); – this will check for single page.


#14. What is taxonomy?

Taxonomy in WordPress is a way of grouping content and data. By default, WordPress comes with 3 default taxonomies.

  1. Category
  2. Tags
  3. Post Formats

We can also create custom taxonomy like custom post types.


#15. What is Custom taxonomy?

Apart from default taxonomy, when we add another group or taxonomy to arrange content, its called custom taxonomy.


#16. What is Localization?

Localization is the process of translating a theme or plugin and internationalize it.


#17. What is Custom Headers in WordPress Themes?

Custom Headers in WordPress allow the site owner to add an image at the top of the page as header. We can change header image via Appearance > customize if the theme has custom header enabled.


#18. How to add custom header support in your WordPress Theme?

By adding add_theme_support( ‘custom-header’ ); in your theme’s functions.php file, we can easily enable custom header for our theme.


#19. What is Shortcode in WordPress?

Shortcode in WordPress is a piece of code that allows you to do effective things very easily.

Here I Explained What are Shortcodes and why you should use them in Detail


#20. Which are the default shortcodes that comes with WordPress?

WordPress comes with these built-in shortcodes :
[audio]
[video]
[gallery]
[caption]
[playlist]
however, we can create own shortcode through shortcode API.


#21. Why we use the shortcode?

To execute any code inside WordPress posts, pages, or widgets directly we use shortcodes.

Here I Explained What are Shortcodes and why you should use them in Detail


#22. How to escape shortcode?

Sometimes we just wanted to show shortcode as it is instead of executing it. To do this we can simply use Two Square brackets.
Example :

[dwp-video] – this will execute video code and display video.
[[dwp-video]] – this will display [dwp-video] as it is.

Escaping Shortcodes in WordPress – Explained in Detail


#23. What is Child Theme in WordPress?

A child theme is a theme that inherits all the functionalities, features and appearance from its parent theme.


#24. Why We Should Use Child Themes?

Child Theme is the safest way to edit any theme. By using a child theme, we can easily edit the functionalities, features, layout, and appearance of a parent theme without even touching the parent theme’s file. And when the parent theme will get updates, our edits in the child theme will be preserved and applied to the updated parent theme.


#25. What is Custom Fields in WordPress?

Custom Fields in WordPress is a feature that gives us an option to add additional information along with the posts.


#26. What is WordPress Multisite?

WordPress Multisite is a feature in WordPress, that allows us to create and run multiple sites on a single WordPress Installation.


#27. How to enable WordPress Multisite Network?

We can enable WordPress Multisite Network by adding this into the wp-config.php file.

/* Multisite */
define(‘WP_ALLOW_MULTISITE’, true);

To Be Continued…!


Keep Visiting, I will add more questions soon. If you guys have any questions, please put them in comment box to list.

And if you guys think there is something wrong info for any questions and answers and should be correct, feel free to share.

I would highly appreciate your feedback.

Thanks

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