Data Modeling
Quiz
•
Computers
•
University
•
Practice Problem
•
Hard
Akvilė Rykovė
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of a class diagram?
To visualize the flow of data in a system
To represent the structure and behavior of a system's classes
To illustrate the relationships between entities in a database
To model the sequence of actions in a business process
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of an entity-relationship diagram (ERD)?
To represent the structure of classes in object-oriented programming
To illustrate the flow of data between different components of a system
To model the entities and relationships in a database
To visualize the sequence of events in a business process
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a type of relationship in an entity-relationship diagram (ERD)?
One-to-one
Many-to-many
One-to-many
Single-to-multiple
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements about entities in an entity-relationship diagram (ERD) is true?
Entities represent attributes of a database table
Entities represent objects in object-oriented programming
Entities represent the relationships between database tables
Entities represent instances of a class
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the "multiplicity" in a UML class diagram represent?
The number of attributes in a class
The number of instances of a class
The minimum and maximum number of associations between classes
The type of relationship between classes
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of a generalization relationship in a UML class diagram?
To represent an association between classes
To model the inheritance hierarchy between classes
To show dependencies between classes
To indicate aggregation between classes
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a composition relationship in a UML class diagram signify?
A strong relationship where one class owns the other class
A weak relationship where both classes share ownership
An association where one class depends on the other class
An aggregation where both classes have independent lifecycles
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Inheritance in object-oriented programming (OOP) allows:
A class to have multiple parents
A class to inherit properties and behavior from another class
A class to override methods of its parent class
A class to access private members of its parent class
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