a) Yes, but only in case of an application for a higher semester. Please read all information about the application deadlines here (on the bottom right side).

As for first semester applications, applicants with a German degree apply directly via FU Berlin. Applicants with a foreign degree apply via uni-assist.

b) No, if you want to apply for the first master semester and your first degree (Bachelor or equivalent) does not comprise at least 60 ECTS credit points in sociology.

The legal basis and rules set for the admission of students only allow to count ECTS-Points (or equivalent courses) from your first course of studies (Bachelor or equivalent).