Discussion
Which of the following is a disadvantage of a centralized database ?
Answer: C
A disadvantage of a centralised database is that it may lead to a single point of failure.
All data is held at one site, so if that server or its network link fails, every user loses access, and a disaster there can lose the data unless backups exist.
Better security through limited access and real-time consistency are advantages of centralisation, and scaling a single central server is harder, not easier.
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