Which of the following questions should not be asked on an employment application?

Asking about a candidate's birthday on an employment application can lead to potential age discrimination. Employers are encouraged to focus on qualifications and skills that are relevant to the job rather than demographic information that does not necessarily pertain to an individual's ability to perform the job effectively. The other questions—work experience, availability, and education level—directly relate to a candidate's qualifications for the role and help employers determine if the individual is a good fit for the position. In contrast, requesting a candidate’s birthday can raise concerns about bias and should be avoided to promote a fair hiring process.