Identify the minimum cardinality of any E-R Diagram relationship:

Question

BlackTom AI · Accepted Answer

When analyzing the minimum cardinality of an E-R Diagram relationship, we consider how entities participate in a relationship. 
Option 1: '0 or 1' — This is the correct way to express the minimum participation: an entity can participate in a relationship either zero times (optional participation) or at least once (mandatory participation). The minimum is not fixed; it depends on the specific modeling of the entity’s participation. 
Option 2: '0 or N' — This is incorrect because N represents a non-fixed, potentially many participation, which confuses maximum cardinality with minimum. In ER terms, the minimum cannot be '0 or N'; it would be either 0 or 1 depending on optionality, not a range that starts at 0 and jumps to N. 
Option 3: '1 or N' — This describes a maximum cardinality constraint (the range of possible counts for an instance across related entities) rather than the minimum. The minimum in this pair would still be 0 or 1, so this option misstates the minimum concept. 
Option 4: '1' — This asserts mandatory participation for every instance of the involved entity. While 1 can be the minimum for a given relationship that requires participation, it is not the universal minimum across all ER diagrams, since some relationships permit optional participation (0). Therefore this option is not universally correct for the general question.

COMM_V 335 101 102 2025W1 FINAL EXAM - 2025W1 - Requires Respondus LockDown Browser

Identify the minimum cardinality of any E-R Diagram relationship:

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类似问题

In an ER diagram, the weak entity is typically depicted with a ___ _, and the relationship between the weak entity and the strong entity is shown with a _____.

In the following diagram, which of the answers below is true?

In an ER-Diagram, relationship cardinality is represented as a:

in ERDplus a label:

A pair of perpendicular (crossing) lines across a relationship line, next to an entity, indicates that:

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Question at position 49 In an ERD, cardinality specifiesThe range of allowable values for an attributeThe unique identifier for an entityThe minimum and maximum number of instances of one entity that can be associated with instances of another entityThe number of attributes within an entity

Question at position 16 What does a "relationship" in an ERD represent?A specific attribute within an entityThe primary attribute of an entityAn association between two or more entitiesThe unique identifier of an entity

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COMM_V 335 101 102 2025W1 FINAL EXAM - 2025W1 - Requires Respondus LockDown Browser

Identify the minimum cardinality of any E-R Diagram relationship:

查看解析

登录即可查看完整答案

类似问题

In an ER diagram, the weak entity is typically depicted with a _________ ___________, and the relationship between the weak entity and the strong entity is shown with a __________ ___________.

In the following diagram, which of the answers below is true?

In an ER-Diagram, relationship cardinality is represented as a:

in ERDplus a label:

A pair of perpendicular (crossing) lines across a relationship line, next to an entity, indicates that:

Observe the ER Diagram for the ABC Retailer: Which of the following is true according to the ABC Retailer ER diagram?

Question at position 49 In an ERD, cardinality specifiesThe range of allowable values for an attributeThe unique identifier for an entityThe minimum and maximum number of instances of one entity that can be associated with instances of another entityThe number of attributes within an entity

Question at position 16 What does a "relationship" in an ERD represent?A specific attribute within an entityThe primary attribute of an entityAn association between two or more entitiesThe unique identifier of an entity

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希望你的学习变得更简单

In an ER diagram, the weak entity is typically depicted with a ___ _, and the relationship between the weak entity and the strong entity is shown with a _____.