Database Management Quizzes for Year 10 Computing Students

Question 1

What's the main reason for using a primary key in a database table?

Accepted Answer

To make sure each row in the table is unique

Answer

To put the data in a certain order

Answer

To keep the most important data in the table

Answer

To connect the table to other tables in the database

Question 2

Which SQL query would you use to retrieve all customer records from a table called 'customers'?

Accepted Answer

SELECT * FROM customers;

Answer

GET customers;

Answer

SELECT customer_id, customer_name FROM customers;

Answer

DELETE FROM customers;

Question 3

Question: Compare the advantages and disadvantages of cloud-based and on-premises database deployment models.

Accepted Answer

Cloud-based databases offer lower initial costs compared to on-premises databases.

Accepted Answer

Cloud-based databases typically allow for easier and faster scaling compared to on-premises databases.

Answer

On-premises databases guarantee better data security compared to cloud-based databases.

Question 4

Which SQL function is used to determine the greatest value within a column?

Accepted Answer

MAX()

Answer

MIN()

Answer

SUM()

Answer

AVG()

Question 5

What is database normalization, and what are its advantages?

Accepted Answer

Normalization is the process of dividing a database into smaller, related tables, following specific rules (normal forms), to improve data organization and reduce redundancy.

Answer

Normalization only involves removing duplicate data from a database.

Answer

Normalized databases are always guaranteed to be more efficient than non-normalized databases.

Answer

Normalization is only necessary for large databases.

Question 6

Which properties ensure the reliability and integrity of data during database transactions?

Accepted Answer

Atomicity, Consistency, Isolation, Durability

Answer

Atomicity, Consistency, Isolation, Redundancy

Answer

Atomicity, Consistency, Durability, Availability

Answer

Atomicity, Consistency, Isolation, Flexibility

Question 7

Why are databases crucial for modern organizations? Describe how they contribute to business operations, aid decision-making, and promote innovation.

Accepted Answer

Databases are essential for modern organizations, enabling efficient data management, informed decision-making, and driving innovation through data-driven insights.

Answer

Databases are mainly used for data storage and organization, with minimal impact on business decisions.

Answer

Database management systems are only valuable for large organizations with vast amounts of data.

Answer

Databases are solely used for transactional purposes, such as recording sales and inventory updates.

Question 8

Data collection and management raise ethical concerns. Discuss these, focusing on data privacy, data ownership, and the responsible use of personal data.

Accepted Answer

The responsible use of personal data includes collecting, using, and storing it securely.

Answer

Data privacy is not a concern as long as the data is collected legally.

Answer

Data ownership is not an ethical issue if the data is used for legitimate purposes.

Answer

Ethical considerations do not apply to the management of databases.

Question 9

What is database normalization and how does it benefit database design?

Accepted Answer

Organizing data into tables based on relationships to minimize redundancy and enhance consistency.

Answer

Converting a database from one data model to another, like from relational to hierarchical.

Answer

Optimizing database performance by reducing the number of tables and columns.

Question 10

Which of the following accurately describes common database security threats and effective protective measures?

Accepted Answer

A. Common threats include brute force attacks, SQL injection, and malware, while encryption, access control, and regular backups are key protective measures.

Answer

B. Weak passwords and outdated software pose no security risks, but physical security and user training are crucial.

Answer

C. Only malicious insiders pose threats to databases, so external threats can be ignored.

Answer

D. Database security is not important for small businesses or personal data.

Question 11

Which of the following statements accurately compares the on-premises and cloud-based database deployment models?

Accepted Answer

On-premises deployment offers more control and flexibility, while cloud-based deployment is more cost-effective and requires less maintenance.

Answer

Cloud-based deployment provides better security and reliability than on-premises deployment.

Answer

On-premises deployment requires less technical expertise to manage than cloud-based deployment.

Question 12

Which technique is NOT typically used to optimize database performance?

Accepted Answer

Data denormalization

Answer

Indexing

Answer

Query optimization

Answer

Data partitioning

Question 13

Which component is NOT a part of a Relational Database Management System (RDBMS)?

Accepted Answer

Spreadsheet

Answer

Data dictionary

Answer

User interface

Answer

Query processor

Question 14

In a database table, what is the primary purpose of a primary key?

Accepted Answer

To uniquely identify each row

Answer

To define the sequence of rows

Answer

To store additional information about the row

Answer

To connect the table to other tables

Question 15

Which data type is used to store numerical values in a database?

Accepted Answer

Integer

Answer

String

Answer

Boolean

Answer

Date

Question 16

In SQL, what is the distinction between a SELECT statement and an UPDATE statement?

Accepted Answer

SELECT retrieves data, while UPDATE modifies data.

Answer

UPDATE retrieves data, while SELECT modifies data.

Answer

Both statements retrieve data.

Answer

Both statements modify data.

Question 17

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

Accepted Answer

To ensure the existence of related data in other tables

Answer

To prevent duplicate data entry

Answer

To index data for faster retrieval

Answer

To define the primary key for a table

Question 18

In a database system, what is the role of a query optimizer?

Accepted Answer

To generate an efficient execution plan for queries

Answer

To parse and validate SQL statements

Answer

To store and manage data

Answer

To create and maintain database tables

Question 19

Which statement falls under the category of Data Manipulation Language (DML)?

Accepted Answer

INSERT

Answer

SELECT

Answer

CREATE TABLE

Answer

ALTER TABLE

Question 20

What is the purpose of a transaction in a database system?

Accepted Answer

To maintain data integrity and consistency

Answer

To enhance performance

Answer

To control access to data

Answer

To backup data

Question 21

Which of the following is **not** a key component of a database management system (DBMS)?

Accepted Answer

Operating system

Answer

Database

Answer

Query language

Answer

Database administrator

Question 22

Which of the following data types is most suitable for storing date and time information?

Accepted Answer

Date

Answer

Integer

Answer

String

Answer

Boolean

Question 23

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

Accepted Answer

To uniquely identify each row in a table

Answer

To define relationships between tables

Answer

To ensure data integrity

Answer

To improve query performance

Question 24

What is the key difference between a DBMS and a RDBMS?

Accepted Answer

A RDBMS supports relational data models, while a DBMS does not.

Answer

A DBMS stores data in tables, while a RDBMS stores data in rows and columns.

Answer

A DBMS is designed for a single user, while a RDBMS is designed for multiple users.

Answer

A DBMS is less secure than a RDBMS.

Question 25

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

Accepted Answer

To enforce data integrity by ensuring that referenced data exists

Answer

To create a one-to-many relationship between two tables

Answer

To create a many-to-many relationship between two tables

Answer

To improve query performance by reducing the number of joins

Question 26

What is the purpose of the WHERE clause in an SQL statement?

Accepted Answer

To define which rows to select

Answer

To define which columns to select

Answer

To define how to sort the results

Answer

To define how to group the results

Question 27

Which of the following is an example of a database application?

Accepted Answer

Database management software

Answer

Spreadsheet software

Answer

Word processing software

Answer

Presentation software

Question 28

Which of the following is **not** a type of data model?

Accepted Answer

Procedural

Answer

Relational

Answer

Hierarchical

Answer

Object-oriented

Question 29

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

Accepted Answer

To uniquely identify each row

Answer

To link to other tables

Answer

To store the most important data

Answer

To ensure data integrity

Question 30

Which SQL statement is used to create a new table?

Accepted Answer

CREATE TABLE

Answer

ADD TABLE

Answer

INSERT INTO

Answer

SELECT FROM

Question 31

What is the primary purpose of a database management system (DBMS)?

Accepted Answer

To manage and control access to data

Answer

To perform calculations and data analysis

Answer

To display data in a user-friendly format

Answer

To create and modify database structures

Question 32

What is the difference between a database schema and a database instance?

Accepted Answer

Schema is the logical structure, while an instance is a physical implementation

Answer

Instance is the logical structure, while a schema is a physical implementation

Answer

Schema and instance are the same thing

Answer

There is no difference between schema and instance

Question 33

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

Accepted Answer

To reference a primary key in another table

Answer

To create a unique index on a column

Answer

To enforce data integrity

Answer

To store additional information about a row

Question 34

What does the acronym ACID stand for in the context of databases?

Accepted Answer

Atomicity, Consistency, Isolation, Durability

Answer

Availability, Consistency, Isolation, Durability

Answer

Accuracy, Consistency, Integrity, Durability

Answer

Atomicity, Coherence, Isolation, Durability

Question 35

Which of the following is NOT a valid data type in SQL?

Accepted Answer

List

Answer

Integer

Answer

String

Answer

Boolean

Question 36

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

Accepted Answer

To uniquely identify each row in a table

Answer

To store the most important data in a table

Answer

To establish relationships between tables

Answer

To enforce data integrity

Question 37

Which SQL command is used to create a new table?

Accepted Answer

CREATE TABLE

Answer

SELECT

Answer

INSERT

Answer

DELETE

Question 38

Which of the following is a key benefit of using a database management system (DBMS)?

Accepted Answer

Improved data security and integrity

Answer

Increased data redundancy

Answer

Reduced data consistency

Answer

Slower performance

Question 39

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

Accepted Answer

To establish relationships between tables

Answer

To uniquely identify each row in a table

Answer

To store the most important data in a table

Answer

To enforce data integrity

Question 40

What is the primary purpose of an index in a database?

Accepted Answer

To improve the performance of data retrieval queries

Answer

To ensure data integrity

Answer

To store duplicate data

Answer

To reduce the size of the database

Question 41

What is the primary function of a primary key in a database table?

Accepted Answer

To uniquely identify each record in the table

Answer

To store the maximum value in a column

Answer

To enforce a foreign key constraint

Answer

To create an index for the table

Question 42

To create a new database table using SQL, which statement is used?

Accepted Answer

CREATE TABLE

Answer

ADD TABLE

Answer

MAKE TABLE

Answer

NEW TABLE

Question 43

What is the main distinction between a logical and a physical database model?

Accepted Answer

A logical model represents the conceptual design, while a physical model represents the implementation details

Answer

A physical model represents the conceptual design, while a logical model represents the implementation details

Answer

Both logical and physical models represent the conceptual design

Answer

Both logical and physical models represent the implementation details

Question 44

Which of the following tasks is NOT typically part of a database administrator's (DBA) responsibilities?

Accepted Answer

Developing software applications

Answer

Managing and maintaining databases

Answer

Optimizing database performance

Answer

Providing technical support to users

Question 45

Which data type is NOT supported in SQL?

Accepted Answer

Array

Answer

Integer

Answer

String

Answer

Date

Question 46

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

Accepted Answer

Uniquely identifies each row

Answer

Stores the most crucial data

Answer

Links related tables

Answer

Ensures accurate data entry

Question 47

Which of the following SQL commands is used to create a new database?

Accepted Answer

CREATE DATABASE

Answer

NEW DATABASE

Answer

CREATE NEW DATABASE

Answer

MAKE DATABASE

Question 48

What is the function of a foreign key in a database?

Accepted Answer

Establishes relationships between tables

Answer

Ensures data accuracy

Answer

Stores additional row information

Answer

Creates unique identifiers for rows

Question 49

Which SQL command is used to extract data from a database?

Accepted Answer

SELECT

Answer

GET

Answer

READ

Answer

FETCH

Question 50

What is the purpose of an index in a database?

Accepted Answer

Accelerates data retrieval

Answer

Stores extra row information

Answer

Creates unique row identifiers

Answer

Establishes table relationships

Question 51

How do rows and columns differ in a database table?

Accepted Answer

A row represents an entity, while a column represents its attributes

Answer

A column represents an entity, while a row represents its attributes

Answer

They are interchangeable concepts

Answer

A row is a subset of a column, while a column is a subset of a row

Question 52

What's the main purpose of a Database Management System (DBMS)?

Accepted Answer

Manage and control access to data

Answer

Change data into different formats

Answer

Protect data from unauthorized access

Answer

Analyze data for trends and patterns

Question 53

In SQL, which of the following is NOT a fundamental data type?

Accepted Answer

Array

Answer

Integer

Answer

Boolean

Answer

String

Question 54

What is the primary function of a primary key in a database table?

Accepted Answer

Uniquely identifying each record

Answer

Storing the most critical data

Answer

Connecting the table to others

Answer

Maintaining data integrity

Question 55

Which SQL command is used to establish a new database?

Accepted Answer

CREATE DATABASE

Answer

NEW DATABASE

Answer

MAKE DATABASE

Answer

BUILD DATABASE

Question 56

How do SELECT and INSERT statements differ in SQL?

Accepted Answer

SELECT retrieves data, while INSERT adds data

Answer

INSERT retrieves data, while SELECT adds data

Answer

Both retrieve data

Answer

Both add data

Question 57

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

Accepted Answer

Enforcing referential integrity

Answer

Linking tables

Answer

Storing additional row data

Answer

Creating unique indexes

Question 58

What is the primary purpose of a WHERE clause in SQL?

Accepted Answer

Filtering data based on specified conditions

Answer

Sorting data in a specific order

Answer

Grouping data by specified fields

Answer

Updating data in a table

Question 59

What is the main purpose of indexing in a database?

Accepted Answer

Enhancing query performance

Answer

Enforcing data integrity

Answer

Reducing data storage space

Answer

Creating a data backup

Question 60

Which techniques are used to ensure data integrity and recover databases in the event of failures?

Accepted Answer

Transaction logs

Accepted Answer

Backups

Accepted Answer

Replication

Answer

Data mining

Question 61

In a database, what is the data type designed to hold text?

Accepted Answer

String

Answer

Integer

Answer

Boolean

Answer

Date

Question 62

Which SQL command is used to retrieve specific columns from a table?

Accepted Answer

SELECT

Answer

INSERT

Answer

UPDATE

Answer

DELETE

Question 63

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

Accepted Answer

To uniquely identify each row

Answer

To store the most critical data

Answer

To ensure data integrity

Answer

To improve performance

Question 64

What is the name of the process of creating a logical representation of data organization?

Accepted Answer

Data modeling

Answer

SQL programming

Answer

Database design

Answer

Data normalization