Data Management: Master Data Types, Databases, and Security

Question 1

Which data type has only two possible values, true or false?

Accepted Answer

Boolean

Answer

Integer

Answer

String

Answer

Date

Question 2

Which data type is most appropriate for storing dates and times in a database?

Accepted Answer

Date

Answer

Integer

Answer

String

Answer

Boolean

Question 3

What is the primary role of a Database Management System (DBMS)?

Accepted Answer

To create and manage databases and control user access to data.

Answer

To ensure data integrity and perform complex data analysis.

Answer

To store and retrieve data efficiently.

Answer

To provide a graphical user interface for database interaction.

Question 4

What is the main purpose of a primary key in a database table?

Accepted Answer

To uniquely identify each record in the table.

Answer

To store the most important data in the table.

Answer

To reference other tables in the database.

Answer

To enforce data integrity constraints.

Question 5

What is the key difference between structured and unstructured data?

Accepted Answer

Structured data has a predefined format, while unstructured data does not.

Answer

Unstructured data has a predefined format, while structured data does not.

Answer

Structured data is easier to store than unstructured data.

Answer

Unstructured data is easier to store than structured data.

Question 6

Which data type represents whole numbers without decimal points?

Accepted Answer

Integer

Answer

Float

Answer

String

Answer

Boolean

Question 7

What is the primary purpose of a Database Management System (DBMS)?

Accepted Answer

Creating, managing, and accessing databases

Answer

Enhancing data security and privacy

Answer

Improving data analysis and reporting

Answer

Automating data backup and recovery

Question 8

What is the primary objective of data normalization?

Accepted Answer

Reducing data redundancy and inconsistencies

Answer

Increasing database storage efficiency

Answer

Enhancing data retrieval speed

Answer

Improving data security

Question 9

What is the fundamental distinction between a primary key and a foreign key?

Accepted Answer

A primary key uniquely identifies rows within a table, while a foreign key references a primary key in another table.

Answer

A foreign key uniquely identifies rows within a table, while a primary key references a foreign key in another table.

Answer

Both primary keys and foreign keys establish relationships between tables.

Answer

There is no significant difference between primary keys and foreign keys.

Question 10

What is the primary function of a data dictionary?

Accepted Answer

Documenting the structure and contents of a database

Answer

Providing a glossary of database terminology

Answer

Storing sensitive data in an encrypted format

Answer

Managing user permissions for database access

Question 11

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

Accepted Answer

Uniquely identifies each record in a table

Answer

Establishes relationships between tables

Answer

Ensures data integrity and consistency

Answer

Determines the data type of a column

Question 12

What is the main purpose of a data dictionary in a data management system?

Accepted Answer

Stores metadata about data elements, providing documentation and definitions

Answer

Enforces data integrity and consistency rules

Answer

Optimizes data storage and retrieval performance

Answer

Facilitates data exchange between different applications

Question 13

What do the letters ACID represent in the context of database transactions?

Accepted Answer

Atomicity, Consistency, Isolation, Durability

Answer

Accuracy, Consistency, Integrity, Durability

Answer

Availability, Consistency, Isolation, Durability

Answer

Atomicity, Consistency, Isolation, Redundancy

Question 14

Which data modeling technique is most suitable for representing intricate relationships between data entities?

Accepted Answer

Entity-Relationship (ER) Model

Answer

Hierarchical Model

Answer

Network Model

Answer

Object-Oriented Model

Question 15

What is the primary purpose of data modeling in the context of database design?

Accepted Answer

Creating a visual representation of the data requirements

Answer

Generating SQL statements for database creation

Answer

Ensuring data integrity and consistency

Answer

Documenting the database schema

Question 16

Which of the following is NOT a primitive data type commonly used in programming languages?

Accepted Answer

Collection

Answer

Integer

Answer

Boolean

Answer

String

Question 17

What is the primary responsibility of a Database Management System (DBMS)?

Accepted Answer

Storing and managing data effectively

Answer

Performing complex calculations and statistical analysis

Answer

Generating reports and visualizations

Answer

Developing and deploying web applications

Question 18

Which data model represents relationships between data items as a network of interconnected entities?

Accepted Answer

Network

Answer

Hierarchical

Answer

Relational

Answer

Object-relational

Question 19

What is the purpose of a data dictionary in a database system?

Accepted Answer

To provide a centralized repository of data element definitions and their attributes

Answer

To store the actual data values in a structured format

Answer

To generate documentation and metadata for the database

Answer

To manage user permissions and access control

Question 20

Which of the following is a disadvantage of data warehousing?

Accepted Answer

Increased data redundancy

Answer

Improved data accessibility

Answer

Enhanced data integration

Question 21

Which of the following is NOT a fundamental data type used in database management systems?

Accepted Answer

Image

Answer

Numeric

Answer

Date

Answer

String

Question 22

What is the primary objective of a database management system?

Accepted Answer

To manage, organize, and maintain vast amounts of structured data effectively and efficiently.

Answer

To ensure the security and privacy of sensitive data.

Answer

To store and retrieve data as needed by users and applications.

Answer

To process and analyze data for decision-making.

Question 23

What is the main advantage of data normalization in database management?

Accepted Answer

Reduces data redundancy and enhances data consistency, leading to improved data quality and integrity.

Answer

Enhances data processing speed and improves data accessibility.

Answer

Increases data storage capacity and minimizes data fragmentation.

Question 24

Which of the following techniques is commonly used for data validation?

Accepted Answer

Input Masking

Answer

Data Encryption

Answer

Data Warehousing

Answer

Data Mining

Question 25

What is the fundamental distinction between relational and non-relational database models?

Accepted Answer

Relational databases utilize structured tables with predefined relationships, while non-relational databases employ flexible, document-oriented collections for data storage.

Answer

Relational databases are inherently faster than non-relational databases.

Question 26

Which of the following is a key advantage of utilizing a cloud-based database management system?

Accepted Answer

Reduced infrastructure costs and simplified maintenance.

Answer

Greater control over data management and customization.

Answer

Enhanced data security and increased data privacy.

Question 27

What is the primary objective of data governance?

Accepted Answer

To establish policies and practices that ensure the quality, integrity, security, and effective use of data throughout its lifecycle.

Answer

To increase data storage capacity and minimize data fragmentation.

Answer

To enhance data processing speed and improve data accessibility.

Question 28

What is the primary function of a data dictionary in a database management system?

Accepted Answer

To provide a centralized repository of metadata, defining data elements, their properties, and relationships.

Answer

To ensure data security and access control.

Answer

To store and manage the actual data values.