WordPress Developer Interview Questions and Answers

There is a list of top frequently asked WordPress interview questions and answers are given below.

1. What is WordPress?

Ans WordPress is a free open-source content management system (CMS) written PHP language. The first version of WordPress was released in 2003. It allows users to create dynamic websites from personal blogs to E-commerce.

2. What is a plugin in WordPress?

Ans In WordPress, Plugins are a piece of code that contains one or more functions written to extend and add to the functionality of an existing WordPress website. The plugin offers custom functions and provides many features so that each user can tailor their site to their specific requirements.

Example:
1. Akismet
2. Classic Editor

3. Where is WordPress Content stored?

Ans The WordPress contents are stored in the MySQL database on the server.

4. Differences between posts and pages in WordPress

Ans

Post
Page
1. Posts are dynamic content.1. Pages are static content.
2. Posts are timed entries.2. Pages are timeless entries.
3. Posts aren't permanent entries.3. Pages are permanent entries.

5. Why does WordPress use MySQL?

Ans WordPress uses MySQL because there are some following reasons:

i. MySQL is an open-source database server.
ii. It is a widely accessible database server.
iii. It is extremely fast than the database server.
iv. It supported by many low-cost Linux hosts.

6. How many default tables in WordPress?

Ans There are 12 tables in WordPress, those are:

i. wp_options
ii. wp_users
iii. wp_links
iv. wp_commentmeta
v. wp_term_relationships
vi. wp_postmeta
vii. wp_posts
viii. wp_term_taxonomy
ix. wp_usermeta
x. wp_terms
xi. wp_termmeta
xii. wp_comments

7. What is the prefix of WordPress default tables?

Ans wp_ is the prefix of WordPress default tables.

8. What is WordPress loop?

Ans In WordPress, The Loop is the PHP code used to display posts.

9. What is Child Theme in WordPress?

Ans The extension of a parent theme is called a child theme.

10. How to run a database query on WordPress?

Ans WordPress’s Query function allows you to execute any SQL query on the WordPress database. It is best used when there is a need for specific, custom or complex SQL queries. It has the following syntax:

$wpdp->query(‘query'); 

11. What do you mean by Custom field in WordPress?

Ans It is a feature in WordPress which allows users to add additional information when writing a post. It also referred to as post meta.

12. What is taxonomy?

Ans In WordPress, a taxonomy is a grouping mechanism for some posts. There are two types of default taxonomies in WordPress. Those are:
i. Category
ii. Tag

13. What are importers in WordPress?

Ans In WordPress, Importers are plugins that provide the functionality to import a bulk XML file with any number of records. It enables to import of Posts, Page, Custom Posts and Users data in an XML file.

14. How can you disable comments in WordPress?

Ans To disable comments in WordPress, there are some following steps:

Step1: Login to your WordPress Admin Panel.

Step2: Go the settings menu.

Step3: Under settings menu click on Discussion.

Step4: Uncheck Allow people to post comments on new articles.

Step5: Click on the save changes button.

15. What are hooks?

Ans Hooks are a generic term in WordPress that allow your plugin into the rest of the WordPress, by calling your custom functions at specific times.

16. How many types of hooks in WordPress? explain it.

Ans In WordPress, There are two types of hooks:

i. Actions Hooks: It is a PHP function that is executed at specific points throughout the WordPress Core.
ii. Filters Hooks: It allows us to get and modify WordPress data before it is sent to the database/browser, using our custom functions.

17. Difference between include and require.

Ans If an error occurs, the include() function generates a warning, but the script will continue execution.
The require() generates a fatal error, and the script will stop.

18. What are the template tags in WordPress?

Ans In WordPress, templates tags are PHP functions that are used to display information dynamically or customizing blog template.

Example:

i. get_header()
ii. get_footer()
iii. bloginfo()
iv. wp_title()
v. wp_enqueue_script()
vi. category_description()

19. Which function is used to get the website URL in WordPress?

Ans get_site_url() function is used to get website url in wordpress.

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

Ans There are some following rules to develop WordPress plugin

i. Create a unique name
ii. Create the folder of Plugin
iii. Create a sub-folder for PHP files, translations, and assets.
iv. Create the main plug-in file and fill up the header information.
v. Create activation and de-activation functions.
vi. Create an uninstall script.
vii. Create a readme.txt file.
viii. Detecting the paths to plug-in file, use proper functions and constants.

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