20 WordPress Interview Questions

1. What is WordPress?

WordPress is an open-source CMS anyone can download for free. It is based on PHP paired with MySQL. 

2. Since when is WordPress in the market?

The first version of WordPress was released in year 2003. The latest version v5.5 was made public in August 2020.

3. What are some top features of WordPress?

WordPress is the most popular CMS in the market. Thus, it obviously has excellent features. Some I particularly like are:

• Its simplicity: Anyone, whether tech-illiterate or tech-literate, can use it.
• SEO-optimization: The software itself is well optimized to rank on search engines. Moreover, with the help of WordPress plugins like Yoast, one can easily optimize their website for search engines such as Google.
• Its flexibility: With WordPress, anything and everything is possible. Blogs, portfolio sites, e-commerce stores, business sites ⁠— you name it!
• Plugins: On the WordPress marketplace, there are plugins available for everything ranging from SEO to security and tables to image optimization.
• Themes: 1000s of ready-made themes, meant for every possible website, are available in the market. One can simply download it and use it.

4. List some of your favorite WordPress plugins?

I like the plugins that get basic yet fundamental things done. Some I download instantly on any of my WordPress sites are:

• Wordfence for security.
• W3 Total Cache for caching.
• Autooptimize for optimized backend & faster loading speed.
• ShortPixel to down-scale images.
• WPForms to create forms.
• UpdraftPlus for backups.
• And Elementor as a site builder.

5. How is wordpress.com different than wordpress.org?

With wordpress.com, WordPress hosts your site, and you do not have as much as the flexibility you have with wordpress.org. For wordpress.org, you have to choose the host. You can add all the plugins, themes, and codes you want with WordPress Org.

6. Which DBMS does WordPress use, and how many tables are added by default?

WordPress uses MySQL. There are 11 tables created by default when you install WordPress on your server:

• wp_options
• wp_users
• wp_links
• wp_commentmeta
• wp_term_relationships
• wp_postmeta
• wp_posts
• wp_term_taxonomy
• wp_usermeta
• wp_terms
• wp_comments

7. List some disadvantages of WordPress?

• To make it accessible for everyone, WordPress’s plugin-based style is a curse in disguise. Adding plugins make the site heavy and loading speed slow. Also, it makes it vulnerable to security threats.
• One can lose data in the process of updating WordPress.
• It only uses PHP

8. What are WordPress taxonomies?

Taxonomies are used to classify content and data in WordPress. Category, Tags, and Post Formats are default WordPress taxonomies.

9. How secure is WordPress?

Unless you are using an outdated version of WordPress or have poor/nulled plugins on your site, WordPress is fully secure.

10. Which CMS holds the largest market share? Why?

Currently, WordPress dominates the CMS market with more than 60% market share. A lot of its success is because of its simplicity and community of developers.

11. Are objects passed by value or by reference, in WordPress?

All objects are passed by value.

12. What are the rules that you have to follow for WordPress plugin development?

To develop a WordPress plugin, create:

• a unique name
• the plugin’s folder
• a sub-folder for PHP files,  translations, and assets
• the main plug-in file and fill in the header information
• activation and de-activation functions
• an uninstall script
• a readme.txt file

13. What are some CMS alternatives to WordPress?

WordPress is #1 CMS in the market by the number of users. The second and third (that come with its own pros & cons) are Drupal and Joomla.

14. What are hooks? Mention the two types of hooks?

With Hooks, one can create a WordPress plugin or theme without changing the original files and with shortcode. 

The two types of hooks are Filter hooks and Action hooks.

15. List some filter hooks functions?

• has_filter()
• add_filter()
• apply_filters()
• current_filter()
• remove_filter()
• doing_filter()

16. List some action hooks functions?

• has_action()
• add_action()
• do_action()
• did_action()
• remove_action()
• doing_action()

17. List template tags in WordPress?

• get_header()
• get_sidebar()
• get_bookmarks()
• wp_title()
• wp_register()
• wp_enqueue_script()
• wp_list_authors()
• get_the_author()
• category_description()

18. What are template tags in WordPress?

As WordPress.org defines it, “Template tags are used within your blog's Templates to display information dynamically or otherwise customize your blog, providing the tools to make it as individual and interesting as you are.”

19. Give five reasons why WordPress uses MySQL for database management?

• It’s widely used.
• It’s fast.
• It’s an open-source RDBMS.
• Zero cost.
• Supported by low-cost & premium hosts alike.

20. What is “loop” in WordPress?

WordPress uses PHP code to display posts. That code is called “loop”.

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