Final answer:
The correct answer to which one is NOT a disadvantage of File Systems is d. Database administrators. Database administrators are crucial for the management of databases, not a disadvantage like data redundancy, data inaccessibility, or poor file management.
Step-by-step explanation:
Which one is NOT a disadvantage of File Systems? The answer is d. Database administrators.
File systems come with a fair number of disadvantages, which include issues like data redundancy, wherein the same pieces of data are stored in multiple places unnecessarily; poor file management, which can lead to disorganized and inefficient data storage; and data inaccessibility, which refers to the difficulty in retrieving data when stored across different files and formats and not integrated cohesively.
However, the database administrators are not a disadvantage but rather a role within an organization responsible for the management and maintenance of databases, ensuring data integrity, security, and performance.
They are an asset and a necessity for sophisticated database management systems, rather than a file system-specific concern.