How to correctly configure path for the Realm DB-file (.realm) in iOS project?

Question

Sorry for my english.

I have developed a mobile application that needs its own local data store. I chose Realm as the database management system. In the process of study

Answer 1

1) and 2) does have very small effect on security and data integrity 3) if you are worry about security of you data, use Realm-level encryption like here