Sometimes, because of the complex professional background, there may be some advantages in job hunting. For example, some economic colleges will give priority to graduates with science and engineering backgrounds when recruiting.
However, if there is no certain supporting relationship between the undergraduate major and the cross-examination major, it may not add points to your job search. Moreover, there are also some positions that require graduate students to be consistent with undergraduate majors.
If you cross the exam, you can try to rank high in the postgraduate stage (for example, you can indicate the percentage of top professional achievements in the future on your resume). In addition, some certificates related to the postgraduate entrance examination or some papers published are helpful for finding a job.