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10 Questions

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Cardinality in Relational Databases

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Questions and Answers

What is a unary relationship?

Relationship between instances of three entity types

Relationship between the instances of a single entity type (correct)

Relationship between instances of different degrees

Relationship between instances of two entity types

In a binary relationship, how many entity types are involved?

One

Two (correct)

Three

Variable, depending on the situation

Which type of relationship is characterized by simultaneous connections among three entity types?

Quaternary Relationship

Ternary Relationship (correct)

Binary Relationship

Unary Relationship

What does minimum cardinality refer to?

The minimum number of instances of one entity that may be associated with each instance of another entity Signup and view all the answers

What is the most common type of relationship encountered in data modeling?

Binary Relationship Signup and view all the answers

Which option best defines the concept of 'maximum cardinality'?

The maximum number of instances of one entity that may be associated with another entity Signup and view all the answers

What is a common characteristic of binary relationships?

Most frequently encountered in data modeling Signup and view all the answers

'Patient has Patient History' is an example of what kind of relationship?

'Mandatory One' Relationship Signup and view all the answers

'Product Vendor supplies Warehouse' is an example of what type of relationship?

'Ternary Relationship' Signup and view all the answers

'Person is married to' would best represent which type of relationship?

'Binary Relationship' Signup and view all the answers