The optional /wp-contents/mu-plugins/ folder is used to add what type of plugins to a site?

What action is used to modify the post query before it is run?

When using WordPress multi-site, how you can get the ID of the current blog?

Where can the size limit for uploaded files be set?

If you are writing a custom query that will not be paginated, you should:

If pagination is not needed, which should be included in the array of arguments passed to WP_Query()?

update_post_meta can be used in place of add_post_meta.

To remove all the html tags from a string, so that only plain text is left, you'd rather

What is the preferred way to programmatically make an HTTP API GET request from within WordPress?

How can one determine the post format of the current post in the loop?

How do you turn on debugging in WordPress?