How can you retrieve all options at once?

To create a string with 12 random alphanumeric characters, in WordPress I can use this function

Which one is NOT a built-in WP cron event recurrence?

What to use to import a parent theme stylesheet?

You can convert Hex ecncoded characters to ASCII using the following WordPress function

Which one is NOT a transient time constant?

What feature allows you to attach additional non-standard information to posts?

If a theme is not acting as anticipated after loading a plugin, what should you do?

These are provided in the Plugin API and enable your plugin to call functions at specific times during the loading of WP.

Under WordPress Coding Standards, you should NEVER use shorthand PHP start tags and always use full PHP tags.

Template file sidebar.php must be included in every theme