Database-Management-System
November 9, 2023Software-Engineering
November 9, 2023Database-Management-System
| Question 724 |
E-R model uses this symbol to represent weak entity set?
| Dotted rectangle | |
| Diamond | |
| Doubly outlined rectangle | |
| None of these |
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.
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