My hukou is in Shandong, but the college entrance examination is in Shaanxi. Where will my file and account go after graduation?

You worry too much. After graduation, the household registration and files will be transferred to your work unit or local police station, unless you can't find a job, you will go back to your hometown. It has nothing to do with the place of origin filled in at the time of admission. When you graduate, as long as you don't owe tuition, you will be given the account, and you can move wherever you want. Before finding a job, some graduates will move to the talent market.