Database-Management-System
November 9, 2023Software-Engineering
November 9, 2023Database-Management-System
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Question 724
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E-R model uses this symbol to represent weak entity set?
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Dotted rectangle
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Diamond
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Doubly outlined rectangle
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None of these
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Question 724 Explanation:
→ A weak entity is an entity that cannot be uniquely identified by its attributes alone.
→ It must use a foreign key in conjunction with its attributes to create a primary key.
→ The foreign key is typically a primary key of an entity it is related to.
→ It must use a foreign key in conjunction with its attributes to create a primary key.
→ The foreign key is typically a primary key of an entity it is related to.
Correct Answer: C
Question 724 Explanation:
→ A weak entity is an entity that cannot be uniquely identified by its attributes alone.
→ It must use a foreign key in conjunction with its attributes to create a primary key.
→ The foreign key is typically a primary key of an entity it is related to.
→ It must use a foreign key in conjunction with its attributes to create a primary key.
→ The foreign key is typically a primary key of an entity it is related to.