You can study from any device; computer, tablet or phone. Previous exams, by chapter, preparation for the final exam. You can review the content and previous exams as many times as you want. Allergens exam can be supervised at your home or office and in person or remotely. You only need to get 70% of the 90 questions right If you fail your first exam attempt, you will get two additional attempts at no charge. Allergens certification: valid for 3 years Nationally accredited certification by ServSafe. Classes and exams are available in English and Spanish. All sales are final