If you have a unique index on attributes Name, Email, what causes a database exception when inserting data?

The correct choice involves understanding how a unique index works in a database. A unique index on the attributes Name and Email means that the combination of these two attributes must be unique across the dataset. This ensures that no two records can have the same pair of values for both the Name and Email fields.

In the chosen scenario where you attempt to insert (John, john@example.com, 555-33333) and (John, john@example.com, 777-99999), the database will raise an exception. This occurs because both records share identical values for the Name and Email attributes, although they may have different phone numbers. Since they violate the uniqueness constraint on the combination of Name and Email, the database treats this as an attempt to insert duplicate data, leading to a violation of the unique index requirement.

This understanding of unique indexes clarifies why the other options do not result in exceptions. In the first option, inserting (John, john@example.com) and (John, john.james@example.com) does not violate the unique index because the email addresses are different. The third option involves different names with the same email, which would also not trigger an exception due to the uniqueness being tied to the combination of both attributes. Lastly, the statement regarding