Which question is inappropriate to ask a prospective employee during an interview?

Asking whether a prospective employee has ever been arrested is inappropriate because it can lead to the disclosure of information that may not be relevant to the individual’s ability to perform the job. Many jurisdictions have laws regulating what employers can ask about an applicant's criminal history, especially when it comes to arrests that did not lead to convictions. Such questions can also inadvertently lead to discrimination or bias in the hiring process, as they may disproportionately impact certain groups of people.

In contrast, the other questions are directly related to the candidate's motivations, ambitions, and problem-solving abilities, all of which are pertinent to assessing their fit for the position. Asking about motivation can provide insight into the candidate's values and whether they align with the organization’s goals. Inquiring about career goals helps understand if the applicant’s aspirations align with the potential career path available through the company. Requesting a description of a challenge faced allows the interviewer to evaluate the candidate's critical thinking, resilience, and ability to overcome obstacles—qualities that are valuable in any employee.