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.

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 6 of 12

Explore more Topics under DBMS

01

DBMS Basics

02

Data Models

03

The Entity Relationship Approach

04

Data Storage and Querying

05

Relational Algebra

06

Normalization

07

Storage and File Structures

08

Indexing and Hashing

09

Transactions

10

Concurrency Control

11

Recovery System

12

Distributed Databases

13

SQL

14

Data Warehousing and Data Mining

15

RDBMS

16

Advanced SQL

17

SQL Queries,Constraints and Triggers

Q51.

When mapping a ternary relationship with an associative entity into a relation which of the following is true?

One relation is created.

Two relations are created.

Three relations are created.

Four relations are created.

Discuss

Answer: (d).Four relations are created.

Q52.

When mapping a supertype/subtype relationship which of the following is true?

The supertype primary key is assigned to each subtype.

The subtype primary key is assigned to each supertype.

There is no link between the supertype/subtype entities.

There is no primary key/foreign key relationship between a supertype/subtype.

Discuss

Answer: (a).The supertype primary key is assigned to each subtype.

Q53.

If no multivalued attributes exist in a relation, then the relation is in what normal form?

First normal form

Second normal form

Third normal form

Fourth normal form

Discuss

Answer: (a).First normal form

Q54.

If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?

First normal form

Second normal form

Third normal form

Fourth normal form

Discuss

Answer: (b).Second normal form

Q55.

A transitive dependency is which of the following?

A functional dependency between two or more key attributes.

A functional dependency between two or more nonkey attributes.

A relation that is in first normal form.

A relation that is in second normal form.

Discuss

Answer: (b).A functional dependency between two or more nonkey attributes.

Q56.

What is the best data type definition for Oracle when a field is alphanumeric and has a fixed length?

VARCHAR2

CHAR

LONG

NUMBER

Discuss

Answer: (b).CHAR

Q57.

If a denormalization situation exists with a many-to-many or associative binary relationship, which of the following is true?

All fields are stored in one relation.

All fields are stored in two relations.

All fields are stored in three relations.

All fields are stored in four relations.

Discuss

Answer: (b).All fields are stored in two relations.

Q58.

Which of the following is an advantage of partitioning?

Complexity

Inconsistent access speed

Extra space

Security

Discuss

Answer: (d).Security

Q59.

Sequential retrieval on a primary key for sequential file storage has which of the following features?

Very fast

Moderately fast

Slow

Impractical

Discuss

Answer: (a).Very fast

Q60.

A rule of thumb for choosing indexes for a relational database includes which of the following?

Indexes are more useful on smaller tables.

Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries.

Do not specify a unique index for the primary key of each table.

Be careful indexing attributes that have null values.

Discuss

Answer: (d).Be careful indexing attributes that have null values.

Page 6 of 12

Welcome to the Relational Databases MCQs Page

Relational Databases MCQs | Page 6 of 12

Explore more Topics under DBMS

DBMS Basics

Data Models

The Entity Relationship Approach

Data Storage and Querying

Relational Algebra

Normalization

Storage and File Structures

Indexing and Hashing

Transactions

Concurrency Control

Recovery System

Distributed Databases

SQL

Data Warehousing and Data Mining

RDBMS

Advanced SQL

SQL Queries,Constraints and Triggers

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