Final answer:
Master files store records with a consistent structure but varying content. Records share the same fields but differ in the specific data they carry, analogous to student databases where individual details vary.
Step-by-step explanation:
Master files contain records of persistent data. If you compare two records in the same master file, you find that the structure or format of these records are the same, but the content or specific data contained can be different. For instance, in a database of student records, the structure would include fields like student ID, name, course, etc. However, the content – that is the specific student ID, names, and the courses in which they are enrolled – will differ between records.