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      Question

      An RDBMS provides mechanisms for data integrity, such as

      primary keys and foreign keys, which are generally lacking in:
      A Object-Oriented Databases Correct Answer Incorrect Answer
      B NoSQL Databases Correct Answer Incorrect Answer
      C Hierarchical Databases Correct Answer Incorrect Answer
      D Flat-file systems Correct Answer Incorrect Answer
      E Network Databases Correct Answer Incorrect Answer

      Solution

      Flat-file systems

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