WordPress Interview Questions

Word press is the best Open Source CMS which allows it to be used free of cost. You can use it on any personal or commercial website without having to pay a single penny for it. It is built on PHP/MySQL (which is again Open Source) and licensed under GPL.

The word press is safe to operate, but still, it is suggested to keep updating with the latest version of WordPress to avoid hacking.

You can use WordPress for e-commerce sites, membership sites, photo galleries, and any other type of site you can think of. The website is created using the same HTML code as any other site, so there are no limitations there either.

WordPress was originally used as blogging software though it has since become popular for the website also. It is not necessary to have a blog to use WordPress. Still having a blog is commendable as it will help in search engine optimization.

It is one of the benefits of using WordPress; it has an inbuilt SEO search engine. Also, you can have an additional plug-in in WordPress to help with SEO and rank on a popular search engine like Google.

You need to quote the current version of WordPress available in the market along with the release date.

There are two types of hooks 1) Action hooks 2) Filter hooks

Hooks allow a user to create a WordPress theme or plugin with shortcode without changing the original files. Action hooks allow you to insert an additional code from an outside resource, whereas, Filter hooks will only allow you to add content or text at the end of the post.

The custom field is a meta-data that allows you to store arbitrary information in the WordPress post. Through the custom field, extra information can be added to the post.

Few positive aspects of WordPress are

• Easy installation and upgrade
• In-built SEO engine
• Easy theme system
• Flexibility
• Multilingual- available in more than 70 languages
• Own data- no unwanted advert on your website
• Flexibility and Easy publishing option

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

By default, wp_ is the prefix for WordPress.

MySQL is a widely available database server and is extremely fast. It is open-source, and it is available at no cost also it is supported by many low-cost Linux hosts so its easy for anyone to host their website.

• Yes, it is possible to rename the WordPress folder. If WordPress is already installed, you have to log in to the weblog as the administrator and then change the settings
• WordPress address (URI) :
• Blog address( URI) :
• After making the changes, you can rename the folder or directory with the WordPress file in it.

There are about 11 tables in WordPress by default. Note: With succeeding releases of WordPress this number will change. You need to check phpMyAdmin to determine the number of tables in a vanilla version of the latest WordPress installation.

2003

To display post WordPress use PHP code, this code is known as a loop.

If you go to the dashboard under options “discussion, there is a comment “ Allow people to post a comment” try unchecking the comment.

• Install security plugins like WP security
• Re-install the latest version of WordPress
• Change password and user-ids for all your users
• Check your themes and plug-ins are up to date

There are 11 table in wordpress, they are

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

wp_ is default prefix for WordPress.

• The use of multiple plugins can make a website heavy to load and slow
• Only utilizes PHP
• Sometimes updates can lead to loss of data, so you always need a backup copy
• Modifying Images and tables is difficult.

When a theme is activated it’s what’s controlling your site, while an installed theme is simply part of your theme library and available to activate.

Featured Image is the meta box that is not hidden by default on Post and Page screens.

The WordPress Address is where to look for WordPress files, while the Site Address is what will be used as the base for creating URLs for web pages.

Custom fields are also known as post meta. Post meta is a feature in WordPress which allows post authors to add additional information at the time writing a post. WordPress stores this information as metadata in key-value pairs. Users can later display this metadata by using template tags in their WordPress themes if required.

In WordPress, all objects are passed by value.

The Loop is PHP code used by WordPress to display posts.

To disable comments in WordPress, Please follow the below steps

• Step 1: Log in to your WordPress admin panel.
• Step 2: Go to the Settings menu.
• Step 3: Under the Settings menu click on Discussion.
• Step 4: Uncheck Allow people to post comments on new articles.checkbox
• Step 5: Click on the save changes button, you do

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 otherwise complex SQL queries. For more basic queries, such as selecting information from a table, see the other wpdb functions above such as get_results, get_var, get_row, or get_col.
Syntax

 $wpdb->query(query); ?>  

Read more from https://codex.wordpress.org/Class_Reference/wpdb#Running_General_Queries

Below are list of some Filter hooks functions

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

Below are list of some Action hooks functions

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