Confused CoupleFlickr / Brian TalbotYou'll want to be prepared.

Some job interviewers ask tough questions to trip you up or to get you to reveal information you may be trying to conceal. Others want to get a better sense of your thought process or see how you respond under pressure.

Whatever the reason, you'll want to be prepared.

In her book "301 Smart Answers to Tough Interview Questions," Vicky Oliver says in order to prevail, you need to "trounce your competition."

One of the best ways to stand out: have the smartest answers to the toughest questions.

Note: Many of these are examples of great responses to help guide you. They won't necessarily work for everyone, in every situation. You should never lie in an interview.

Vivian Giang contributed to a previous version of this article.