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39 39 votes

Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?

  1. Diamonds with double/bold border 
  2. Rectangles with double/bold border
  3. Ovals with double/bold border
  4. Ovals that contain underlined identifiers

4 Answers

Best answer
75 75 votes

Answer : $A$

Weak entity relationships are represented by diamond with double/bold border whereas weak entity set is represented by Rectangles with double/bold border.

• edited by
20 20 votes
weak entity set represented by Rectangles with double/bold border.

weak entity relationships represented by Diamonds with double/bold border.
5 5 votes

Option A 

The entity sets which do not have sufficient attributes to form a primary key are known as weak entity sets and the entity sets which have a primary key are known as strong entity sets.

Weak entity represented by rectangle double/bold border

Identifying relationship represented with Diamond double /bold border 

41 to 45

• edited by
1 1 vote

It is asking about the "many-one relationship" of a weak entity set..
It's not asking about the Weak Entity Set itselt.
So the answer would be B if they ask about Weak Entity set itself.
As they asked about the RELATIONSHIP, It's Diamon with double/bold border.
So, Option A is the correct.


TIPS : READ THE QUESTION VERY CAREFULLY.

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