The sommelier exam is renowned for being extremely difficult, with a low pass rate of around 5-10%. It requires a comprehensive knowledge of wine, including grape varietals, wine regions, production techniques, and food pairing. The exam often includes blind tastings, where candidates must identify grape varietals, regions, and vintages with only their senses as a reference. The physical demands of the exam are also challenging, with candidates required to carry heavy wine bottles and master the art of opening them with precision. Therefore, the sommelier exam is no easy feat and requires a significant amount of study, preparation, and dedication.