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Welcome to the The Entity Relationship Approach MCQs Page

Dive deep into the fascinating world of The Entity Relationship Approach with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of The Entity Relationship Approach, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of The Entity Relationship Approach, 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 The Entity Relationship Approach. 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 The Entity Relationship Approach. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

The Entity Relationship Approach MCQs | Page 27 of 31

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Q261.
Let us consider phone_number ,which can take single or several values . Treating phone_numberas an _________ permits instructors to have several phone numbers (including zero) associated with them.

a.

Entity

b.

Attribute

c.

Relation

d.

Value

Discuss
Answer: (a).Entity
Q262.
The total participation by entities is represented in E-R diagram as

a.

Dashed line

b.

Double line

c.

Double rectangle

d.

Circle

Discuss
Answer: (b).Double line
Q263.
Which of the following is a low level operator?

a.

Insert

b.

Update

c.

Delete

d.

Directory

Discuss
Answer: (d).Directory
Q264.
A window into a portion of a database is

a.

Schema

b.

View

c.

Query

d.

Data dictionary

Discuss
Answer: (b).View
Q265.
The entity set person is classified as student and employee. This process is called _________

a.

Generalization

b.

Specialization

c.

Inheritance

d.

Constraint generalization

Discuss
Answer: (b).Specialization
Q266.
Which relationship is used to represent a specialization entity ?

a.

ISA

b.

AIS

c.

ONIS

d.

WHOIS

Discuss
Answer: (a).ISA
Q267.
The refinement from an initial entity set into successive levels of entity subgroupings represents a ________ design process in which distinctions are made explicit.

a.

Hierarchy

b.

Bottom-up

c.

Top-down

d.

Radical

Discuss
Answer: (c).Top-down
Q268.
There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called

a.

Commonality

b.

Specialization

c.

Generalization

d.

Similarity

Discuss
Answer: (c).Generalization
Q269.
If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has

a.

Hierarchy

b.

Multilevel inheritance

c.

Single inheritance

d.

Multiple inheritance

Discuss
Answer: (d).Multiple inheritance
Q270.
A _____________ constraint requires that an entity belong to no more than one lower-level entity set.

a.

Disjointness

b.

Uniqueness

c.

Special

d.

Relational

Discuss
Answer: (a).Disjointness
Page 27 of 31

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