Final answer:
The statement is false because a shared lock on a database table allows multiple users to concurrently obtain their own shared locks to read from the table, but it prevents any modifications during this time. Other shared locks can be obtained, while exclusive locks are the type that prevent others from obtaining any lock on the resource.
Step-by-step explanation:
The statement, "If a user has a shared lock on a table, this will prevent any other user from obtaining a shared or exclusive lock on the same table," is False. In database management systems, shared locks are designed to allow multiple users to read from a table concurrently, but they do not allow any changes while the lock is in place. However, other users can still acquire their own shared locks and read from the table at the same time. An exclusive lock is different, as it prevents other users from obtaining either shared or exclusive locks on the same resource, because it is typically used to perform write operations that need to prevent other transactions from accessing the resource simultaneously.