No one can inform you on the specific questions that may be asked concerning your individual case.

In general terms the Embassy staff will want to hear from you in your own words those answers you provided on the visa application form.
They will most likely ask you to explain further such things as:-
- Who you live with and why
- who is providing financial support, how, how much and how often
- What family relatives do you have living in Philippines and where do they live
- are you in full time education or working
- what contact you have with your mother

They'll want to establish who has 'sole responsibility' (search on the forum for that), and if you are living an independent life.

What would happen to you if you would be unable to settle in UK

As others have said you need to be honest in your answers.

I strongly suggest you review the answers you provided on the application form and be prepared to provide further details in your own words at the interview.