WordPress is an open-source software licensed under the GPL. This means that __.

Which of these CSS classs naming convention is correct according to WordPress CSS Coding Standards?

Which folder in a WordPress install is not affected by an automatic WordPress update?

What are transients?

If you wanted to debug some JavaScript, which method would you use to display data in your browser console?

On a webpage, there are frequently navigation links, a search bar, or other elements that appear before the main content. For keyborad and screen reader users, it can be frustrating to get to the main content of a page because they have to tab through all these elements on every new page load. What can you add to a site to fix this?

Can you add custom meta boxes to the post editor page?

What is the default WordPress admin url?

I am backing up my WordPress website. At a minimum, I need to make copies of:

What is the maximum number of blogs that can be created in a WordPress network?

How much does it costs to host your plugin in WordPress plugin directory?