Confronted with difficult questions in an interview, the job-hunters mostly will be at a loss about what to do.
Usually, you cannot prepare for these questions in advance and have to depend on your immediate performance.
Still, there are some rules to follow.
In this case, you should first keep calm and normal to the face.
Don't get nervous and freaked out.
Formulate a satisfactory answer based on your specific situation.
There should be neither too much silence nor hasty answers
Try to show the best of yourself with decent words and manners.
Don't be discouraged even when confronted with negative questions
You should admit your weakness frankly.
Anyway, what really matters is that you have tried your best.
You must have confidence in yourself.