I am a new user to this component of it, I am I have some queries

1- How can I import Articles and Categories of "Joomla Core" to " K2 component " and the opposite


2- What if I want to uninstall the K2 component . Will I lose all the articles and Categories i was created it by K2

Hi. Regarding your questions:

1. You can click the "Import content" button which can be found in K2 items administration list. This will import Joomla! articles to K2. For the reverse procedure you need to find an extension doing this. K2 does not provide such functionality.

2. Yes, when K2 is uninstalled all of it's data is removed.