One of the most challenging questions I faced in a job interview was "Tell me about a time when you had to deal with a difficult coworker or client and how you resolved the situation." I tackled this by discussing a specific example, highlighting my communication and problem-solving skills, and focusing on the positive outcome. My tip is to always be prepared with specific examples from your past experiences that showcase your skills and abilities. Practice answering behavioral questions and be honest and confident in your responses. Remember to stay calm, composed, and professional throughout the interview process.