If required, will you be able to relocate or travel?
Again, your answer must be truthful. If you agree, only for the sake of getting the job you will end up in murky waters.
Certain companies have multi city/national setup. You may have to relocate for a project or on promotion, as the case is. Some profiles include extensive travelling. You must talk about these possibilities with your family before coming for the interview and give an honest answer.