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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 24 of 31

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Q231.
State true or false: We cannot specify keys in the Entity-Relationship model

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (b).False
Q232.
State true or false: Multiple attributes combined together can be primary keys

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q233.
Which of the following is a good database management practice?

a.

Adding redundant attributes

b.

Removing redundant attributes

c.

Not specifying primary keys

d.

None of the mentioned

Discuss
Answer: (b).Removing redundant attributes
Q234.
Which of the following symbols represent entity sets in an ER diagram?

a.

Divided rectangles

b.

Diamonds

c.

Lines

d.

Undivided rectangles

Discuss
Answer: (a).Divided rectangles
Q235.
Which of the following symbols represent relationship sets in an ER diagram

a.

Divided rectangles

b.

Diamonds

c.

Lines

d.

Undivided rectangles

Discuss
Answer: (b).Diamonds
Q236.
What do double diamonds represent in an ER diagram

a.

They link entity sets to relationship sets

b.

Total participation of an entity in a relationship set

c.

Relationship sets linked to weak entity sets

d.

None of the mentioned

Discuss
Answer: (c).Relationship sets linked to weak entity sets
Q237.
What does a directed line ( → ) from a relationship set to two entity sets mean?

a.

One-one

b.

Many-one

c.

Many-many

d.

One-many

Discuss
Answer: (a).One-one
Q238.
How are roles specified in an ER diagram

a.

By labelling the rectangles

b.

By labelling the diamonds

c.

Roles cannot be specified in an ER diagram

d.

By labelling the lines

Discuss
Answer: (d).By labelling the lines
Q239.
For schemas derived from strong entity sets, the _______ of the entity set serves as the primary key of the resulting schema

a.

First attribute

b.

Primary key

c.

Foreign key

d.

None of the mentioned

Discuss
Answer: (b).Primary key
Q240.
State true or false: Derived attributes cannot be directly represented in the relational data model

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Page 24 of 31

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