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      Question

      What is referential integrity?

      A Ensuring that all columns are non-null Correct Answer Incorrect Answer
      B Ensuring that foreign keys correctly reference primary keys in other tables Correct Answer Incorrect Answer
      C Ensuring that tables have unique names Correct Answer Incorrect Answer
      D Ensuring that all data is encrypted Correct Answer Incorrect Answer
      E Ensuring data is stored in JSON format Correct Answer Incorrect Answer

      Solution

      Referential integrity prevents orphan records and maintains consistency between related tables.

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