Have you seen the following information? It provides an overview of what you should expect at the interview:
During this interview you should be prepared to speak about what you have done during your visit to Manitoba and your plans for successful settlement in Manitoba including information about:
- the community in which you hope to reside, the places you have visited, the services you have learned about
- the occupation(s) in which you (and your spouse if relevant) intend to seek employment, the contacts you have made to explore potential employment opportunities and any feedback you have received about your employability
- why you believe that you can be a strong candidate for the Manitoba Provincial Nominee Program
http://www2.immigratemanitoba.com/browse/howtoimmigrate/beforeyouapply/pnp-visit.html