📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

  • google app store apple app store
  • ✖

      Question

      What is a primary key in the context of the ER

      model?
      A A key attribute that uniquely identifies an entity Correct Answer Incorrect Answer
      B A key attribute that is used for data encryption Correct Answer Incorrect Answer
      C A key attribute that is derived from other attributes Correct Answer Incorrect Answer
      D A key attribute that is optional in the database Correct Answer Incorrect Answer

      Solution

      A key attribute that uniquely identifies an entity    

      Practice Next

      Relevant for Exams:

      ask-question