Multiple choice

Which of the following entity set 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 does not have sufficient attributes to form a primary key, and relies on another for its identification,  is called a weak entity set. It does not have a primary key. So, this is correct answer.

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