Related Clues:
- Unwritten exams
- Grad student's hurdle
- Doctorate exam hurdles
- Grueling grad tests
- Advanced degree tests
- Doctoral exams, e.g.
- Grad school hurdle
- Grad student's work
- Grad school grillings
- Grad student's rituals
- Think-on-your-feet challenges
- Some doctoral exams
- Postgraduate exams
- Trying period for a doctoral student
- Ph.D. requirements, often