Database-Driven Website Development: Interactive Learning Quizzes

Question 1

Which of the following is a disadvantage of using a database-driven website?

Accepted Answer

Increased maintenance cost

Answer

Dynamic content

Answer

Improved security

Question 2

In the context of database-driven websites, which approach is most effective in preserving the accuracy and consistency of data?

Accepted Answer

Organize data into multiple tables based on their relationships.

Answer

Consolidate all data into a single comprehensive table.

Answer

Use ad-hoc queries to retrieve data without regard to table structure.

Question 3

Which PHP function is used to establish a connection to a MySQL database using MySQL Improved Extension (mysqli)?

Accepted Answer

mysqli_connect()

Answer

mysql_connect()

Answer

db_connect()

Answer

connect_db()

Question 4

In SQL, which statement is used to retrieve data from a database table?

Accepted Answer

SELECT

Answer

INSERT

Answer

UPDATE

Answer

DELETE

Question 5

Which PHP function is utilized to execute a SQL query on a connected database using mysqli?

Accepted Answer

mysqli_query()

Answer

mysql_query()

Answer

db_query()

Answer

query_db()

Question 6

What is the primary purpose of employing prepared statements in PHP?

Accepted Answer

To prevent SQL injection vulnerabilities

Answer

To enhance database performance

Answer

To simplify SQL query syntax

Answer

To facilitate dynamic query generation

Question 7

Which PHP function is commonly used to fetch and display the results of a SQL query on a web page?

Accepted Answer

mysqli_fetch_array()

Answer

mysql_fetch_array()

Answer

db_fetch_array()

Answer

fetch_array_db()

Question 8

What is the primary role of HTML tables in the context of displaying data retrieved from a database?

Accepted Answer

To organize and format the data effectively

Answer

To add interactive elements to the displayed data

Answer

To securely store the retrieved data

Answer

To validate user input

Question 9

In CSS, which property is used to modify the background color of an HTML element?

Accepted Answer

background-color

Answer

background

Answer

color

Answer

bg-color

Question 10

What is a key advantage of utilizing a CSS framework in the process of web development?

Accepted Answer

Provides a collection of pre-built styles and components

Answer

Ensures compatibility across different web browsers

Answer

Enhances the performance of the website

Answer

Automates the entire web design process

Question 11

Which PHP function is commonly employed for validating user input data?

Accepted Answer

filter_var()

Answer

validate_input()

Answer

db_validate()

Answer

input_validate()

Question 12

When integrating a database with a web application, which practice is strongly discouraged?

Accepted Answer

Storing database credentials directly in the application code

Answer

Employing a database abstraction layer (DAL)

Answer

Enhancing database queries for optimal performance

Answer

Utilizing prepared statements to safeguard against SQL injection attacks

Question 13

What is the primary purpose of the 'mysqli_connect()' function in PHP?

Accepted Answer

To establish a connection to a MySQL database

Answer

To close a connection to a MySQL database

Answer

To execute a SQL query

Answer

To retrieve data from a MySQL database

Question 14

What is the key difference between the 'SELECT' and 'INSERT' SQL statements?

Accepted Answer

'SELECT' is used to retrieve data, while 'INSERT' is used to add new data

Answer

'INSERT' is used to retrieve data, while 'SELECT' is used to add new data

Answer

'SELECT' is used to modify data, while 'INSERT' is used to add new data

Answer

'INSERT' is used to modify data, while 'SELECT' is used to add new data

Question 15

Which HTML element is most commonly used to display the results of a database query in a tabular format?

Accepted Answer

<table>

Answer

<ul>

Answer

<div>

Answer

<span>

Question 16

What is the main purpose of using a 'WHERE' clause in a SQL query?

Accepted Answer

To filter the results based on a specified condition

Answer

To sort the results in a specified order

Answer

To limit the number of results returned

Answer

To group the results by a specified column

Question 17

Which PHP function is used to properly close a connection to a MySQL database?

Accepted Answer

mysqli_close()

Answer

mysql_close()

Answer

close_connection()

Answer

end_connection()

Question 18

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

Accepted Answer

STRING

Answer

INT

Answer

VARCHAR

Answer

BOOLEAN

Question 19

What is the primary purpose of using an 'INDEX' in a MySQL database?

Accepted Answer

To enhance the speed of data retrieval queries

Answer

To create a unique constraint on a column

Answer

To delete duplicate rows from a table

Answer

To establish a relationship between tables

Question 20

Which PHP function is primarily used to establish a connection to a MySQL database?

Accepted Answer

mysqli_connect()

Answer

mysql_connect()

Answer

db_connect()

Answer

connect_db()

Question 21

What is the key difference between a 'SELECT' and 'SELECT *' query in MySQL?

Accepted Answer

'SELECT' retrieves specific columns, while 'SELECT *' retrieves all columns from a table

Answer

There is no difference between the two queries

Answer

'SELECT *' is more efficient than 'SELECT'

Answer

'SELECT' is used for data manipulation, while 'SELECT *' is used for data retrieval

Question 22

What is the primary reason for using prepared statements in PHP when interacting with MySQL?

Accepted Answer

To prevent SQL injection vulnerabilities

Answer

To enhance the performance of database queries

Answer

To simplify the writing of complex queries

Answer

To encrypt sensitive data before sending it to the database

Question 23

What is the primary role of a web server in the context of a database-driven website?

Accepted Answer

To process user requests and generate dynamic content

Answer

To serve static files such as HTML, CSS, and images

Answer

To store and manage the website's database

Answer

To execute database queries and retrieve data

Question 24

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

Accepted Answer

To filter rows based on specified conditions

Answer

To group rows based on common values

Answer

To sort rows in a specified order

Answer

To create a new table

Question 25

Which PHP data type would be most suitable for storing a customer's phone number?

Accepted Answer

String

Answer

Integer

Answer

Float

Answer

Boolean

Question 26

What is the outcome when the following PHP code is executed: $result = mysqli_query($conn, "SELECT * FROM users");?

Accepted Answer

A resource pointing to the result set

Answer

An array containing the result rows

Answer

The number of rows affected

Answer

An error message

Question 27

Which HTML element is commonly used to present tabular data retrieved from a database on a web page?

Accepted Answer

<table>

Answer

<div>

Answer

<ul>

Answer

<span>

Question 28

Which MySQL data type is appropriate for storing a customer's date of birth?

Accepted Answer

DATE

Answer

DATETIME

Answer

TIMESTAMP

Answer

VARCHAR

Question 29

What is the function of the 'INNER JOIN' keyword in SQL?

Accepted Answer

To combine matching rows from multiple tables

Answer

To filter non-matching rows from multiple tables

Answer

To create a new table based on the results of joining tables

Answer

To update matching rows in multiple tables

Question 30

In PHP, what is the correct syntax to execute a MySQL query?

Accepted Answer

$stmt = $conn->query($query)

Answer

$stmt = mysql_query($query)

Answer

$result = $conn->execute($query)

Answer

$result = mysql_execute($query)

Question 31

What is the primary purpose of the 'for' attribute when used with an HTML 'label' element?

Accepted Answer

To associate a label with a form element

Answer

To provide a tooltip for an input field

Answer

To set the default value of a text field

Answer

To create a button that submits the form

Question 32

Which CSS property is used to center text?

Accepted Answer

text-align: center

Answer

align: center

Answer

text-center: center

Answer

align-text: center

Question 33

What HTTP status code represents a successful request?

Accepted Answer

200

Answer

301

Answer

404

Answer

500

Question 34

Which PHP method is used for preventing cross-site scripting (XSS) attacks?

Accepted Answer

$string = htmlspecialchars($string)

Answer

$string = urlencode($string)

Answer

$string = strip_tags($string)

Answer

$string = mysqli_escape_string($string)

Question 35

In PHP, what is the correct syntax to create a database table using MySQLi?

Accepted Answer

$conn->query('CREATE TABLE table_name (id INT, name VARCHAR(255))')

Answer

$result = $conn->create_table('table_name', 'id INT, name VARCHAR(255)')

Answer

$stmt = $conn->prepare('CREATE TABLE table_name (id INT, name VARCHAR(255))')

Answer

$table = $conn->table('table_name')

Question 36

Which HTML input type should be used for a password field?

Accepted Answer

password

Answer

text

Answer

input

Answer

field

Question 37

What is the function of the 'action' attribute in an HTML form?

Accepted Answer

To specify the URL where form data will be submitted

Answer

To display a message after the form is submitted

Answer

To validate user input before submission

Answer

To define the submit button for the form

Question 38

In PHP, how do you execute a query to retrieve all records from the 'users' table and store the result in the `$result` variable?

Accepted Answer

$result = mysqli_query($connection, 'SELECT * FROM users');

Answer

$result = mysql_query($connection, 'SELECT * FROM users');

Answer

$result = query($connection, 'SELECT * FROM users');

Question 39

Which SQL statement correctly retrieves all rows from the 'users' table where the 'age' column exceeds 25?

Accepted Answer

SELECT * FROM users WHERE age > 25

Answer

SELECT age FROM users WHERE age > 25

Answer

SELECT * FROM users > 25

Question 40

In SQL, which data type is specifically designed to store whole numbers without decimal points?

Accepted Answer

Integer

Answer

Float

Answer

String

Answer

Boolean

Question 41

In PHP, which function is used to end a connection to a MySQL database?

Accepted Answer

mysqli_close

Answer

mysql_close

Answer

close_mysql

Answer

terminate_mysql

Question 42

What is the primary purpose of the 'WHERE' clause in an SQL query?

Accepted Answer

To filter the results based on specified conditions.

Answer

To insert data into a table.

Answer

To delete data from a table.

Answer

To create a new table.

Question 43

Which PHP function is primarily used to establish a connection to a MySQL database?

Accepted Answer

mysqli_connect()

Answer

mysql_connect()

Answer

connect_db()

Answer

db_connect()

Question 44

What is the fundamental difference between a primary key and a foreign key in a database?

Accepted Answer

A primary key uniquely identifies each row in a table, while a foreign key references a primary key in another table.

Answer

A primary key is always numeric, while a foreign key can be any data type.

Answer

A primary key is used to sort the data in a table, while a foreign key is used to filter the data.

Question 45

What is the primary role of a web server in a database-driven website architecture?

Accepted Answer

To process HTTP requests and generate dynamic web pages based on data retrieved from the database.

Answer

To store and manage website content.

Answer

To perform database queries and return the results to the user.

Answer

To manage user authentication and authorization.

Question 46

Which technique is commonly employed to optimize the performance of a database-driven website?

Accepted Answer

Caching frequently accessed data.

Answer

Reducing the number of database connections without proper management.

Answer

Increasing the size of the database without considering other factors.

Answer

Disabling error logging to improve response times.

Question 47

What is a significant advantage of utilizing a Content Management System (CMS) for developing a database-driven website?

Accepted Answer

It provides a user-friendly interface to manage website content without requiring extensive technical expertise.

Answer

It eliminates the need for a database.

Answer

It automatically optimizes the website for search engines.

Question 48

When handling errors in a database-driven website, which approach is most effective?

Accepted Answer

Implement a comprehensive error handling mechanism that logs errors, provides meaningful error messages to users, and ensures the website remains functional.

Answer

Display generic error messages without providing any context.

Answer

Ignore errors and hope they don't occur.

Answer

Redirect users to a separate error page for all errors.

Question 49

What is the correct syntax for executing a SQL query using the mysqli extension in PHP?

Accepted Answer

mysqli_query($connection, $query);

Answer

execute_query($connection, $query);

Answer

db_query($connection, $query);

Answer

mysql_query($connection, $query);

Question 50

Which statement accurately describes the purpose of prepared statements in database interactions?

Accepted Answer

Prepared statements prevent SQL injection vulnerabilities by separating query structure from user-supplied data.

Answer

Prepared statements are used to optimize database queries for faster execution.

Question 51

What is the primary function of the `fetch_assoc()` method in PHP when working with database results?

Accepted Answer

Retrieves a row from a result set as an associative array, where keys are column names.

Answer

Updates data in the database based on the provided array.

Answer

Retrieves the entire result set as a single array.