Question about Front End User Fields and Forms

I have 2 specific questions here:

1. if I make a custom user registration form, is the data submitted stored in the db and associated with that user's profile? I ask b/c you have 2 separate User addons, and one if for backend fields only. Please clarify and thanks!
2. If I make multiple groupings of user profile fields using User Meta addon, will all of those meta be stored in the single user's profile?

Thanks!