Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Consider the following statements:S1: The ide...
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Consider the following statements:
S1: The identifying relationship is many-to-one from the weak entity set to the identifying entity set, and the participation of the weak entity set in the relationship is total.
S2: It is possible to have a weak entity set with more than one identifying entity set.
The number of correct statements are ______
Correct answer is '2'. Can you explain this answer?
Verified Answer
Consider the following statements:S1: The identifying relationship is ...
Both the given statements are true.
It is possible to have a weak entity set with more than one identifying entity set. A particular weak entity would then be identified by a combination of entities, one from each identifying entity set. The primary key of the weak entity set would consist of the union of the primary keys of the identifying entity sets, plus the discriminator of the weak entity set.
Most Upvoted Answer
Consider the following statements:S1: The identifying relationship is ...
Understanding Weak Entities and Identifying Relationships
In database design, weak entities and their relationships with identifying entities are crucial concepts. Let's analyze the two statements provided.
Statement S1 Analysis
- The identifying relationship is indeed many-to-one from the weak entity set to the identifying entity set.
- This means that each weak entity must relate to one and only one identifying entity.
- Additionally, the participation of the weak entity in the relationship is total, signifying that every instance of the weak entity must participate in the relationship.
Thus, S1 is correct.
Statement S2 Analysis
- A weak entity set can have more than one identifying entity set.
- This is because the weak entity can depend on multiple strong entities for its identification.
- For instance, consider a scenario where a weak entity represents a "Dependent" associated with both "Employee" and "Project." Here, the dependent could be tied to both entities, making it possible to have multiple identifying relationships.
Therefore, S2 is also correct.
Conclusion
Both statements are valid:
- S1 is correct because it describes the nature of the weak entity's relationship with the strong entity accurately.
- S2 is correct as it illustrates a scenario where a weak entity can relate to multiple strong entities.
Thus, the number of correct statements is 2.
In database design, weak entities and their relationships with identifying entities are crucial concepts. Let's analyze the two statements provided.
Statement S1 Analysis
- The identifying relationship is indeed many-to-one from the weak entity set to the identifying entity set.
- This means that each weak entity must relate to one and only one identifying entity.
- Additionally, the participation of the weak entity in the relationship is total, signifying that every instance of the weak entity must participate in the relationship.
Thus, S1 is correct.
Statement S2 Analysis
- A weak entity set can have more than one identifying entity set.
- This is because the weak entity can depend on multiple strong entities for its identification.
- For instance, consider a scenario where a weak entity represents a "Dependent" associated with both "Employee" and "Project." Here, the dependent could be tied to both entities, making it possible to have multiple identifying relationships.
Therefore, S2 is also correct.
Conclusion
Both statements are valid:
- S1 is correct because it describes the nature of the weak entity's relationship with the strong entity accurately.
- S2 is correct as it illustrates a scenario where a weak entity can relate to multiple strong entities.
Thus, the number of correct statements is 2.
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Consider the following statements:S1: The identifying relationship is many-to-one from the weak entity set to the identifying entity set, and the participation of the weak entity set in the relationship is total.S2:It is possible to have a weak entity set with more than one identifying entity set.The number of correct statements are ______Correct answer is '2'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the following statements:S1: The identifying relationship is many-to-one from the weak entity set to the identifying entity set, and the participation of the weak entity set in the relationship is total.S2:It is possible to have a weak entity set with more than one identifying entity set.The number of correct statements are ______Correct answer is '2'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:S1: The identifying relationship is many-to-one from the weak entity set to the identifying entity set, and the participation of the weak entity set in the relationship is total.S2:It is possible to have a weak entity set with more than one identifying entity set.The number of correct statements are ______Correct answer is '2'. Can you explain this answer?.
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