Final answer:
In a job interview in the United States, it is illegal to ask about an applicant's age, race and ethnicity, and disability.
Step-by-step explanation:
In a job interview in the United States, it is illegal to ask about an applicant's age, race and ethnicity, and disability. These questions fall under the category of personal characteristics that are protected by the Civil Rights Act of 1964. The U.S. Equal Employment Opportunity Commission enforces federal laws that prohibit discrimination based on these protected characteristics.