This function allows you to export a complete category (and all its subcategories) of questions to a text file.
Please note that in many file formats some information is lost when the questions are exported. This is because many formats do not possess all the features that exist in Moodle questions. You should not expect to export and import questions and for them to be identical. Also some question types may not export at all. You are advised to check exported data before using it in a production environment.
A number of file formats are supported. See in the individual help files and the Moodle Docs for details.
Import and Export formats are a pluggable resource. Other optional formats may be available in the Modules and Plugins database.