Which of the following is considered illegal to ask for on a resume?

Requesting information about a person's religion on a resume is considered illegal because it can lead to discrimination and breach guidelines established by employment laws. Employers are prohibited from considering religious beliefs when making hiring decisions to ensure all candidates are treated fairly and equitably, regardless of their religious background. This is part of broader protections against discrimination based on religion, which are outlined in laws such as Title VII of the Civil Rights Act of 1964.

In contrast, asking about previous work experience, education history, and skills and certifications is standard practice in the hiring process. These elements are directly relevant to a candidate's qualifications and ability to perform a job, and employers have the right to assess them as part of evaluating applicants.