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Welcome to the Relational Databases MCQs Page

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

Relational Databases MCQs | Page 5 of 12

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Q41.
The relational model consists of:

a.

data in the form of tables.

b.

data redundancy.

c.

operations using non-SQL languages.

d.

unorganized data.

Discuss
Answer: (a).data in the form of tables.
Q42.
A primary key is which of the following?

a.

Any attribute

b.

An attribute that uniquely identifies each row

c.

An attribute that uniquely identifies each column

d.

A derived attribute

Discuss
Answer: (b).An attribute that uniquely identifies each row
Q43.
A foreign key is which of the following?

a.

Any attribute

b.

The same thing as a primary key

c.

An attribute that serves as the primary key of another relation

d.

None of the above.

Discuss
Answer: (c).An attribute that serves as the primary key of another relation
Q44.
Relations are:

a.

two-dimensional tables.

b.

three-dimensional tables.

c.

four-dimensional tables.

d.

five-dimensional tables.

Discuss
Answer: (a).two-dimensional tables.
Q45.
A relation has which of the following properties?

a.

Each row is not unique.

b.

Attributes can have the same name within a given table.

c.

Each relation has a unique name.

d.

The order of the columns is significant.

Discuss
Answer: (c).Each relation has a unique name.
Q46.
The entity integrity rule states that:

a.

no primary key attribute may be null.

b.

no primary key can be composite.

c.

no primary key may be unique.

d.

no primary key may be equal to a value in a foreign key.

Discuss
Answer: (a).no primary key attribute may be null.
Q47.
When mapping a multivalued attribute into a relation which of the following is true?

a.

One relation is created.

b.

Two relations are created.

c.

Three relations are created.

d.

Four relations are created.

Discuss
Answer: (b).Two relations are created.
Q48.
When mapping a regular entity into a relation which of the following is true?

a.

One relation is created.

b.

Two relations are created.

c.

Three relations are created.

d.

Four relations are created.

Discuss
Answer: (a).One relation is created.
Q49.
When mapping a binary many-to-many relationship into a relation which of the following is true?

a.

One relation is created.

b.

Two relations are created.

c.

Three relations are created.

d.

Four relations are created.

Discuss
Answer: (c).Three relations are created.
Q50.
When mapping a many-to-many unary relationship into a relation which of the following is true?

a.

One relation is created.

b.

Two relations are created.

c.

Three relations are created.

d.

Four relations are created.

Discuss
Answer: (b).Two relations are created.
Page 5 of 12

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