An open book test also called an open-book exam, is a type of test in which you are allowed to have materials such as notes or books with you. These exams differ from regular exams because they do not focus on memorization but understanding or applying knowledge in different situations. In terms of the materials allowed, these depend on the type of exam and teacher but usually include your notes or notebook, books related to the subject of the exam, and other sources such as dictionaries or glossaries in need you need to check some concept. Thus, it is true dictionaries are considered a resource allowed in an open book test.
