In the figure below there exists a relationship between the Employee and the Dependent Relations. What type of relationship is shown?

Question

BlackTom AI · Accepted Answer

When analyzing the diagram, we observe that the Dependent entity cannot stand alone and relies on the Employee entity for its identity. 
Option 1: 'A Strong and Weak Entity Relationship.' This is consistent with a weak entity (Dependent) that has a partial key and an identifying relationship to its owner (Employee). The circle and double-line notation typically indicate that the dependent's identity is derived from the employee, which matches a strong (Employee) and weak (Dependent) entity pair.
Option 2: 'A Composite Foreign Key Relationship.' While the dependent may reference the employee via a key, the diagram emphasizes an identifying relationship rather than simply a composite foreign key constraint. The visual cues point to a dependency for identity, not just a foreign key link.
Option 3: 'A Many-to-Many Relationship.' The diagram shows a direct, singular identifying link between each dependent and a single employee, not a many-to-many association where a dependent could relate to multiple employees or vice versa.
Option 4: 'An Associative Relationship.' An associative (junction) entity usually resolves a many-to-many relationship by converting it into two one-to-many relations with its own primary key; the pictured Dependent does not function as a pure associative entity in this context.
In summary, the structure indicates a dependent that is weak and identified by its relationship to an employee, which aligns with a weak-strong entity relationship rather than the other listed types.

In the figure below there exists a relationship between the Employee and the Dependent Relations. What type of relationship is shown? 单项选择题

类似问题

Consider a relationship “Enrolls” between entities Student and Course with the following constraints: A Student may enroll in zero or many Courses. A Course must have at least one Student enrolled. Which of the following correctly represents the modality of this relationship?

Question at position 35 An entity instance of a subtype represents the same entity instance of the supertype. TrueFalse

Using the Entity Relationship Diagram you have drawn on your piece of paper for the Final Subjects Results Table answer the following question. Which relationship should be drawn between the Lecturers and Subjects entities for the Final Subjects Results Table?

A unary relationship:

In an entity relationship diagram, an associative entity is depicted by a(n)

A relationship between the instances of two entities is known as:

What would be the correct cardinality and modality for the following business rules? Each Vehicle has only one owner. But each owner can have more than one vehicle.

Given the E/R diagram below, which of the following statements is true? Select one answer.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单