Multiple choice

Which of the following entity sets does not have a primary key?

  1. Composite entity set

  2. Weak entity set

  3. Strong entity set

  4. Derived entity set

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer. The entity set that doesn’t have sufficient attributes to form a primary key and relies on another for its identification is called a weak entity set. It doesn’t have a primary key. So, this is the correct answer.

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