What is the purpose of the PHP unset() function?

Which of the following is true about PHP data types?

A). PHP is a strongly typed language

B). Variables must be explicitly declared with data types

C). PHP supports dynamic typing

D). PHP only supports numeric data types

What is the correct way to define a constant in PHP?

A). define('MY_CONST', 'value');

B). $MY_CONST = 'value';

C). const MY_CONST = 'value';

D). MY_CONST = 'value';

Which of the following is true about PHP variables?

A). Variables must be declared before use

B). Variable names are case-insensitive

C). Variables cannot be reassigned

D). Variables can only store integers

What does the PHP statement echo 'Hello, World!'; do?

A). Prints 'Hello, World!' to the browser

B). Declares a variable named 'Hello, World!'

C). Performs a calculation

D). Defines a function named 'Hello, World!'

What is the purpose of the PHP include statement?

A). To include and evaluate an external PHP file

B). To create a loop in PHP

C). To define a function in PHP

D). To execute a SQL query

Which of the following is NOT a valid PHP comparison operator?

A). <=

B). ==

C). <>

D). !

Which of the following statements is true about PHP arrays?

A). PHP arrays can hold values of different data types

B). PHP arrays must have continuous index values

C). PHP arrays are immutable

D). PHP arrays can only store integers

Which of the following symbols is used to concatenate strings in PHP?

A). +

B). <>

C). .

D). -

What is the purpose of the PHP require_once statement?

A). To include and evaluate an external PHP file only once

B). To create a loop in PHP

C). To define a function in PHP

D). To execute a SQL query

What is the purpose of the PHP require statement?

A). To include and evaluate an external PHP file

B). To define a function in PHP

C). To create a loop in PHP

D). To execute a SQL query