If you want to crack an interview on PHP, data types in PHP are very important concepts because there are most of the questions on data types in an interview. MCQ on Data Types in PHP is very important to become a PHP Web Developer. Data types are classifications of the various kinds of data that can be used in a program. Data types specify the type of values that variables can hold, how those values are stored, and what operations can be performed on them.
Before looking at MCQ on Data Types in PHP we must know the number of Data Types in PHP and what they are.
List of Data Types in PHP
In PHP, there are several data types that can be used to store different kinds of information. Here’s a list of the main data types in PHP:
- Integer: Represents whole numbers without any decimal points. Examples include -5, 0, 42.
- Float (Floating-Point Number): Represents numbers with a decimal point. Also known as double or real numbers. Examples include 3.14, -0.5, 1.0.
- String: Represents sequences of characters enclosed within single quotes (”) or double quotes (“”). Examples include ‘hello’, “world”, ‘123’.
- Boolean: Represents two possible values: TRUE or FALSE. Examples include true, false.
- Array: Represents an ordered map that stores multiple values under a single variable name. Arrays can be indexed, associative, or multidimensional.
- Object: Represents instances of user-defined data types created using classes. Objects encapsulate properties and methods.
- NULL: Represents a variable with no value. It is often used to initialize variables or indicate the absence of a value.
- Resource: Represents external resources such as file handles or database connections. Resources are created and managed internally by PHP.
These data types serve different purposes and have specific rules and operations associated with them. Understanding and using the appropriate data type for a given scenario is crucial for writing efficient and bug-free PHP code. Additionally, PHP is a dynamically typed language, which means that variables can automatically change their data type based on the context in which they are used.
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Here are 20+ (multiple-choice questions) MCQ on data types in PHP
What data type is used to represent whole numbers in PHP?
- Float
- String
- Integer
- Boolean
Answer 3. Integer
Which of the following represents a floating-point number in PHP?
- 42
- ‘3.14’
- True
- -0.5
Answer 4. -0.5
In PHP, strings can be enclosed within:
- {}
- []
- ”
- “”
Answer 4. “”
What is the data type of the value stored in the variable $isLoggedIn = true;?
- Integer
- String
- Float
- Boolean
Answer 4. Boolean
Which PHP data type is used to store multiple values under a single variable name?
- Object
- String
- Integer
- Array
Answer 4. Array
What does the data type NULL represent in PHP?
- A variable with a value of 0
- A variable with no value
- An empty string variable
- An uninitialized variable
Answer 2. A variable with no value
Which of the following is a compound data type in PHP?
- Integer
- Float
- Array
- Null
Answer 3. Array
Can a boolean variable in PHP have a value other than TRUE or FALSE?
- Yes
- No
Answer 2. No
Which of the following is NOT a valid way to declare a string variable in PHP?
- $name = ‘Quiz’;
- $name = “Lancer”;
- $name = Lancer;
- $name = “Quiz Lancer”;
Answer 3. $name = Lancer;
Which of the following is a special data type in PHP used to represent external resources?
- Integer
- Float
- Array
- Resource
Answer 4. Resource
What will be the data type of the result when adding an integer and a float in PHP?
- Integer
- Float
- String
- Boolean
Answer 2. Float
Which of the following is an example of an indexed array declaration in PHP?
- $colors = [‘Red’, ‘Green’, ‘Blue’];
- $info = [‘name’ => ‘John’, ‘age’ => 30];
- $matrix = [[1, 2], [3, 4]];
- $price = 10.99;
Answer 1. $colors = [‘Red’, ‘Green’, ‘Blue’];
Can a variable in PHP change its data type during execution?
- Yes
- No
Answer 1. Yes
What is the data type of the result when comparing two variables using the identical (===) operator in PHP?
- Integer
- Float
- String
- Boolean
Answer 4. Boolean
FAQ on MCQ on Data Types in PHP
What is the use of Boolean type in PHP?
Boolean type is used to express a truth value. It can be either True or False.
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