Which of the following must not be inquired about on job applications?

It is essential for employers to ensure that their hiring practices comply with anti-discrimination laws and regulations. Inquiring about marital status on job applications can lead to potential discrimination and bias. Such inquiries can reveal personal information that may not be relevant to a candidate's ability to perform the job and can introduce biases based on marital status. As a result, many organizations avoid questions regarding marital status to promote equality and prevent discrimination in the hiring process.

On the other hand, asking about previous work experience, educational background, and availability for work are standard practices. These factors are relevant to assessing a candidate's qualifications and fit for the position. Previous work experience helps employers gauge a candidate's relevant skills, while educational background provides insight into the candidate's formal qualifications. Availability for work ensures that the candidate can meet the scheduling requirements of the job. These inquiries are essential to making informed hiring decisions while remaining compliant with fair employment practices.