Do you think that it is possible for a candidate to spot a bad boss during a job interview? If so, what are the main indicators that distinguish a good boos from a bad one during an interview?

yes by non direct questions you can know that

Sure if the candidate professional he will do that.

other indicators like : Silly questions, Bad comments on the candidate, Ironic environment

I don't think so. I think identifying a person in a right manner can only be over a period of time. so it's difficult to find out in the interview. I feel so. thanks.

Thanks

Agree with Moohammad Ashraf and Mohammad Shouman

Many thanks for your invitation to answer this question.

Bear in mind, bad or good is a concept in our mind about others, it might be Boss or anyone and it should be reflected in any interview, it is not good and no any professionals will do so.  Always be positive and faithful in any interview - No need to speak about anyone badly. Thanks 

When you keep in mind, bad or good is a concept in our minds all the others, and it may be a defect in the same personal or any other person and that should be reflected in an interview, it is not good, you will not any professionals to do so. Always be positive and faithful in any interview - no need to talk about what a bad person. Please accept my greetings

It is not exactly that the boss would be a "bad boss" it's more of an overall positive or negative experience for both ends.

Some situations happen when the interviewer may send negative signals to the person being interviewed and that may influence the interview process and make the candidate  nervous or distracted such as:

- not maintaining eye contact.

- not giving enough time to answer.

- Also, last minute updates or job or role requirements that can be surprising to the candidate and perhaps hard to fulfill. 

such behaviors can influence the flow of the interview negatively and make it complex for both ends to come up with the best interview result eventually. 

If you are a boss who wants to do great work, what can you do about it? Good Boss, Bad Bossis devoted to answering that question

There are numerous easy catching and noticeable signs that may occur from a toxic boss during an interview. A defensive body language from your boss is a sign that you as a candidate represent a threat to his position. For example, during the interview, he or she will avoid direct eye contact with you or may start rifling through papers. A bad attitiude such as exhibitting negative energy like being not enthusiastic, nor intrested in his company. Scanning you from head to toe means that your boss intuitively dispatching you a message that you are smaller than they are and thats propably a clear sign that your talents won't flourish in this new environment. Moreover, when your boss uses Fear as a motivator or exhibit lack of distrusting others, its a sign of a toxic boss. For example, he or she will bring up the words firing or layoff numerous times during the interview. An Excessive nervousness from your boss during the interview such as downing large cups of black coffee, eating lots of sugar is another caution sign. Being extreme friendly is a good thing, although it mightbe a tip that your boss disguise behind  it and will unmask his true personality that you may not like after you you get hired.