раскрыть скобки what mark she (to get) in her exam last

What mark did she get in the exam last week?

Past Simple, interrogative form. The marker of this tense is last week. The question expression is what mark.  It means the question about something that happened in the past at the particulate time.   

The auxiliary verb is did. It goes after a question expression and before a subject. Did is used for any subject in the question. The main verb is used in the basic form, which is an infinitive without the participle to: to get get, to swim- swim, to do do.