Database Design Fundamentals: Master the Core Concepts for Effective Database Management

Question 1

Which of the following is NOT a reason for database normalization?

Accepted Answer

Increasing data complexity

Answer

Eliminating data redundancy

Answer

Improving data integrity

Answer

Improving performance

Question 2

Which fundamental principle of database normalization aims to minimize data duplication?

Accepted Answer

Minimizing data redundancy

Answer

Maximizing data accessibility

Answer

Optimizing query performance

Answer

Ensuring data security

Question 3

Which type of database schema provides a high-level, conceptual view of the database?

Accepted Answer

Conceptual schema

Answer

Logical schema

Answer

Physical schema

Answer

External schema

Question 4

Which of the following is a fundamental concept in database design that aims to remove data redundancy and maintain consistency, ensuring data integrity?

Accepted Answer

Normalization

Answer

Entity-relationship modeling

Answer

Data warehousing

Answer

Database administration

Question 5

Which database constraint can be applied to ensure that a specific attribute cannot contain missing values?

Accepted Answer

NOT NULL

Answer

Primary key

Answer

Foreign key

Answer

Unique

Question 6

What is the primary purpose of a foreign key constraint?

Accepted Answer

Enforce relationships between tables

Answer

Guarantee data accuracy

Answer

Prevent duplicate data entries

Answer

Optimize database queries

Question 7

Which of the following is NOT a data integrity constraint in SQL?

Accepted Answer

DEFAULT

Answer

NOT NULL

Answer

UNIQUE

Answer

PRIMARY KEY

Question 8

Which fundamental principle of database normalization aims to eliminate data duplication?

Accepted Answer

First normal form

Answer

Second normal form

Answer

Third normal form

Answer

Fourth normal form

Question 9

In entity-relationship modeling, which of the following best describes an entity?

Accepted Answer

A tangible or abstract object or concept in the real world

Answer

A relationship between two or more entities

Answer

A collection of attributes describing an object

Answer

A unique identifier for each entity

Question 10

Which is a primary benefit of using foreign keys in a relational database?

Accepted Answer

Enforcing referential integrity

Answer

Reducing data inconsistency

Answer

Optimizing query execution speed

Answer

Simplifying database design

Question 11

What is the primary role of a primary key in a relational database table?

Accepted Answer

To uniquely identify each row

Answer

To maintain data consistency

Answer

To enhance query performance

Answer

To store critical data

Question 12

Which database modeling technique visually depicts relationships between data entities?

Accepted Answer

Entity-relationship modeling

Answer

Logical data modeling

Answer

Physical data modeling

Answer

Object-oriented data modeling

Question 13

In an entity-relationship diagram, which symbol represents a weak entity type?

Accepted Answer

Double rectangle

Answer

Single rectangle

Answer

Diamond

Answer

Ellipse

Question 14

Which data integrity constraint prevents the insertion of duplicate values in a specific column?

Accepted Answer

Unique key constraint

Answer

Primary key constraint

Answer

Foreign key constraint

Answer

Check constraint

Question 15

Which database design technique involves decomposing a database into smaller, logically related tables to minimize data redundancy and improve data integrity?

Accepted Answer

Normalization

Answer

Denormalization

Answer

Entity-relationship modeling

Answer

Data warehousing

Question 16

Which type of SQL statement is primarily used to retrieve data from a database?

Accepted Answer

SELECT

Answer

INSERT

Answer

UPDATE

Answer

DELETE

Question 17

In a database schema, which term refers to a set of attributes that uniquely identifies each row within a table?

Accepted Answer

Primary key

Answer

Foreign key

Answer

Candidate key

Answer

Unique key

Question 18

Which database design principle emphasizes separating the logical structure of data from its physical storage and access methods?

Accepted Answer

Data independence

Answer

Data integrity

Answer

Data normalization

Answer

Data security

Question 19

Which data integrity constraint ensures that a foreign key value in a child table always matches a primary key value in the parent table, thereby enforcing referential integrity?

Accepted Answer

FOREIGN KEY

Answer

NOT NULL

Answer

UNIQUE

Answer

PRIMARY KEY

Question 20

Which of the following is a core principle of database design, aiming to eliminate data redundancy?

Accepted Answer

Normalization

Answer

Denormalization

Answer

Data integrity

Answer

Data redundancy

Question 21

What is the primary purpose of entity-relationship (E-R) modeling in database design?

Accepted Answer

To create a logical representation of entities and their interrelationships

Answer

To normalize the database

Answer

To ensure data consistency

Answer

To optimize query performance

Question 22

Which type of constraint is used to limit the range of values that can be entered into a column?

Accepted Answer

Check constraint

Answer

Primary key constraint

Answer

Foreign key constraint

Answer

Unique constraint

Question 23

What is the primary objective of data normalization in database design?

Accepted Answer

Eliminating data redundancy and inconsistencies

Answer

Improving data integrity and accuracy

Answer

Enhancing query performance and efficiency

Answer

Reducing storage space requirements

Question 24

What is the purpose of a foreign key constraint in a database?

Accepted Answer

To enforce referential integrity between tables

Answer

To ensure that foreign key values correspond to valid primary key values in referenced tables

Answer

To prevent duplicate values in a column

Answer

To improve query performance

Question 25

What is the primary purpose of an entity-relationship diagram (ERD)?

Accepted Answer

To visually represent relationships between entities in a database

Answer

To define the logical structure of a database

Answer

To enforce data integrity constraints

Answer

To optimize database performance

Question 26

What is the primary objective of data normalization?

Accepted Answer

Eliminating redundant data

Answer

Enhancing data integrity

Answer

Improving data accessibility

Answer

Optimizing database performance

Question 27

How are primary keys and foreign keys distinct in database design?

Accepted Answer

A primary key uniquely identifies a row within a table, while a foreign key references a primary key in a separate table.

Answer

Primary keys are exclusively numeric, whereas foreign keys can be of any data type.

Answer

Primary keys can span multiple fields, but foreign keys are limited to referencing a single field.

Answer

Foreign keys are primarily used for data integrity, while primary keys serve no such purpose.

Question 28

What is the primary goal of data integrity in database design?

Accepted Answer

Ensuring the accuracy and consistency of data

Answer

Preventing unauthorized data access

Answer

Optimizing database performance

Answer

Facilitating data analysis

Question 29

Which advanced data modeling technique is specifically designed to manage vast, distributed datasets?

Accepted Answer

NoSQL Modeling

Answer

Object-Oriented Modeling

Answer

Entity-Relationship Modeling

Answer

Relational Modeling

Question 30

What is the primary purpose of an entity-relationship diagram (ERD)?

Accepted Answer

To visually depict the relationships between entities in a database

Answer

To generate the database's physical schema

Answer

To store data in a relational database

Answer

To manage user permissions for a database

Question 31

What is the key distinction between logical and physical database design?

Accepted Answer

Logical design defines the data requirements, while physical design focuses on implementation details.

Answer

Physical design defines the data requirements, while logical design focuses on implementation details.

Answer

Logical and physical designs are essentially the same.

Answer

There is no difference between logical and physical database design.

Question 32

Which data model represents data as a collection of interconnected tables?

Accepted Answer

Relational model

Answer

Hierarchical model

Answer

Network model

Answer

Object-oriented model

Question 33

The main purpose of an entity-relationship diagram (ERD) is to represent

Accepted Answer

The relationships between entities in a database

Answer

The physical structure of a database

Answer

Data integrity constraints

Answer

Database performance optimization strategies

Question 34

In a relational database, a key constraint that uniquely identifies each row within a table is known as a

Accepted Answer

Primary key

Answer

Foreign key

Answer

Candidate key

Answer

Alternate key

Question 35

The distinction between a primary key and a foreign key lies in their

Accepted Answer

Uniqueness within a table vs. referencing a primary key in another table

Answer

Nullability vs. non-nullability

Answer

Data type vs. length

Answer

Indexing vs. non-indexing

Question 36

The primary role of a database schema is to

Accepted Answer

Define the structure and organization of a database

Answer

Specify the data types and formats for each column

Answer

Implement data integrity rules and constraints

Answer

Enhance database performance through optimization techniques

Question 37

Database indexes are primarily employed to

Accepted Answer

Accelerate data retrieval and improve database performance

Answer

Enforce data integrity and prevent data anomalies

Answer

Store metadata about the database

Answer

Provide an alternative way to access data

Question 38

Which integrity constraint ensures that each row in a table has a unique identifier?

Accepted Answer

Primary key constraint

Answer

Entity integrity

Answer

Referential integrity

Answer

Unique key constraint

Question 39

When designing a database, what factor should be prioritized?

Accepted Answer

Identifying and fulfilling the data requirements of the system

Answer

Creating a visually appealing user interface

Answer

Optimizing system performance for speed and efficiency

Answer

Ensuring the convenience of developers during the development process

Question 40

During which stage of the database design process is the logical structure of the database defined?

Accepted Answer

Logical design

Answer

Conceptual design

Answer

Physical design

Answer

Implementation

Question 41

In the context of database normalization, what is the primary objective of the first normal form (1NF)?

Accepted Answer

Eliminating repeating groups within data

Answer

Ensuring that all attributes are atomic and indivisible

Answer

Removing redundant data from the database

Answer

Enforcing referential integrity between tables