Hi, I'm going to have an interview on next week.
From the previous experience of interview, I came across these question and I don't know what to answer as to give a good impression to the interviewer.

1. How do you do well in your exam? (I'm taking professional qualification exam - ACCA and I failed quite many times)
- I straightly said failed quite few times........= =

2. How long would you work with us? Because train a staff is not easy.....

3. What should be done if I don't know the answer of some technical question

Help!