Computer Science for IGCSE & O level - Data Transmission (Section 7 - No. 7)
What is the purpose of an ISBN-13 check digit?
To encrypt the book information.
To identify the book's title.
To prevent errors in data entry.
To measure the book's weight.
Объяснение
The ISBN-13 check digit is calculated to validate the preceding numbers, helping to detect data entry errors.