Predicted grades (IB)

Hi everyone

I'm planning on applying for cambridge Natsci (physical), and was just wondering wether my predicted grades would be ok - I got 777 for my higher level subjects and 776 for my standard level. Overall, I was given a 43 ( 2 on core) - do these grades make it seem doable? I have often heard how cambridge place more emphasis on the interviews and entrance exams - is this true?

Thank you for your help!