What is a key issue related to file processing systems?

A key issue related to file processing systems is data dependency and duplication issues. In these systems, data is often stored in multiple files and formats, which can lead to significant challenges in managing and maintaining the data. This situation arises when the structure of the data storage is closely tied to the applications that use it. If an application's requirements change, it may necessitate alterations to the data structure, which can be complex and time-consuming.

Moreover, because data can be duplicated across different files, this can lead to inconsistencies. Updates made in one location may not be reflected in others, causing discrepancies that can compromise data integrity. This redundancy not only consumes additional storage resources but also complicates data management, as ensuring that all copies are current and synchronized becomes increasingly difficult.

In contrast, the other options do not represent primary issues inherent in file processing systems. For example, real-time accessibility is often seen as a desired feature and can be implemented in various systems; easy data sharing is generally more effectively achieved through database management systems rather than file processing systems; and separation from physical storage is not a key issue, as file processing relies on a direct connection to how data is stored. Overall, the issue of data dependency and duplication encapsulates the significant limitations faced by file