Which of the following questions is illegal to ask in a job interview in the United States?

• Which university did you attend?
• Which state were you born in?
• Do you have a commercial driver's license?
• What salary would you expect for this position?

Correct Answer: Which state were you born in?

Explanation: In the United States, federal anti-discrimination laws make it illegal to discriminate against job applicants based on protected characteristics like national origin, citizenship, or birthplace. Directly or indirectly asking a candidate where they were born, such as asking "Which state were you born in?", is illegal because it can reveal these protected attributes. Conversely, inquiries about a candidate's education, specific licensing required for the job, or salary expectations are legally permissible.