If a field's data type is chosen carefully, can its security be managed?
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If a field's data type is chosen carefully, can its security be managed?
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- Exercise 3: school system Each subject is owned by a department and each department is managed by a teacher, called Head of Department (HOD). Each department has a name and a unique code number. Each subject has a name, unique number and credit value. All teachers have a unique ID. A HOD cannot manage more than one department at a time. Also, a HOD does not teach subjects. A subject cannot be taught by more than one teacher. Finally, the system needs to know each student's contact details, including, full ID, address, age and gender, as well as date of enrolment in the subject. name, studentHow do handler interfaces ensure data integrity during the processing of events?When building a data model, why is it sometimes preferable to leave out certain information?