Final answer:
Master files contain static data with consistent field names, but individual field values differ among records.
Step-by-step explanation:
Master files contain static data. If you compare two records in the same master file, you find that the field names are the same, but the field values can be different. Master files are important in database management and information systems as they hold the core data that does not change frequently. In any typical database or record-keeping system, master files are used to maintain consistent reference information such as customer details, product information, or employee records. While the structure of a master file remains consistent, the data contained within each individual record can vary, reflecting the different attributes pertaining to each entity.