Status of the Land Registrar

What is the status of the Land Registrar in your country:

a) Who is responsible for performing the act of registration of property rights?
b) In case of doubt/appeal, who decides?
c) Must he/she have a legal educational background?
d) Could you characterize the act of registration as a purely administrative duty or a quasi-judicial one?
e) Is the Land Registrar independent in his/her decision making? If yes, how does your legal system assures such functional independence (i.e. the decisions are only challenged before a court).