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Welcome to the Data Models MCQs Page

Dive deep into the fascinating world of Data Models with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Models, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Models, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

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Check out the MCQs below to embark on an enriching journey through Data Models. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Data Models. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Models MCQs | Page 8 of 19

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Q71.
An object can have which of the following multiplicities?

a.

Zero

b.

One

c.

More than one

d.

All of the above.

Discuss
Answer: (d).All of the above.
Q72.
Multiplicity is the same as what concept for an ERD?

a.

Relationship

b.

Attribute

c.

Entity

d.

Cardinality

Discuss
Answer: (d).Cardinality
Q73.
An abstract class is which of the following?

a.

A class that has direct instances, but whose descendants may have direct instances.

b.

A class that has no direct instances, but whose descendants may have direct instances.

c.

A class that has direct instances, but whose descendants may not have direct instances.

d.

A class that has no direct instances, but whose descendants may not have direct instances

Discuss
Answer: (b).A class that has no direct instances, but whose descendants may have direct instances.
Q74.
The term Incomplete for a UML has the same meaning as which of the following for an EER diagram?

a.

Overlapping rule

b.

Disjoint rule

c.

Total specialization rule

d.

Partial specialization rule

Discuss
Answer: (d).Partial specialization rule
Q75.
The fact that the same operation may apply to two or more classes is called what?

a.

Inheritance

b.

Polymorphism

c.

Encapsulation

d.

Multiple classification

Discuss
Answer: (b).Polymorphism
Q76.
Aggregation is which of the following?

a.

Expresses a part-of relationship and is a stronger form of an association relationship.

b.

Expresses a part-of relationship and is a weaker form of an association relationship.

c.

Expresses an is-a relationship and is a stronger form of an association relationship.

d.

Expresses an is-a relationship and is a weaker form of an association relationship.

Discuss
Answer: (a).Expresses a part-of relationship and is a stronger form of an association relationship.
Q77.
Composition is a stronger form of which of the following?

a.

Aggregation

b.

Encapsulation

c.

Inheritance

d.

All of the above.

Discuss
Answer: (a).Aggregation
Q78.
Which of the following applies to a class rather than an object?

a.

Query

b.

Update

c.

Scope

d.

Constructor

Discuss
Answer: (c).Scope
Q79.
The object-oriented development life cycle is which of the following?

a.

Analysis, design, and implementation steps in the given order and using multiple iterations.

b.

Analysis, design, and implementation steps in the given order and going through the steps no more than one time.

c.

Analysis, design, and implementation steps in any order and using multiple iterations.

d.

Analysis, design, and implementation steps in any order and going through the steps no more than one time.

Discuss
Answer: (a).Analysis, design, and implementation steps in the given order and using multiple iterations.
Q80.
The benefits of object-oriented modeling are which of the following?

a.

The ability to tackle more challenging problems

b.

Reusability of analysis, design, and programming results

c.

Improved communication between users, analysts, etc.

d.

All of the above.

Discuss
Answer: (d).All of the above.
Page 8 of 19

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