During an interview,the interviewer asks this question,how as a waiter should you deal with a customers complain in the restaurant?

The complaint should be taken seriously first

to handle the costumer complaints you should always be in the manner of calm and feel the attitude of the costumer, you must be  a good listener to let let complinant first to explain there side... always remember the costumer is always right...then take action of ther complaint it it is just minor that can the done by you that in the major complaints so must tell it to the supervisor all the datails about the costumer complaint so that the supervisor have already the knowledge before facing the coscumer to discuss about the problem...

always used yes i can attitude and making it rigth because guest is guest they need100% satisfaction. the best way to handle guest complaint is to be yourself act normally apologised for the enconvient and give complementary service to satisfy that guest complaint.simply by that