A yellow exercise book is a type of notebook that is typically used for writing or drawing. It is often made of paper and has a yellow cover. Exercise books are often used in schools and classrooms for taking notes, completing assignments, and organizing notes and class materials. They are also commonly used by individuals for personal or professional use, such as for keeping track of notes and ideas, planning projects, and organizing schedules and to-do lists. The yellow color of the cover may be chosen for its bright, cheerful appearance, or it may be chosen for its ability to stand out and be easily noticed.