PHP Operators MCQ Questions and Answers

1. What does the '==' operator do in PHP?

a) Assigns a value

b) Compares two values for equality

c) Adds two values

d) Checks if one value is greater than the other

Answer:

b) Compares two values for equality

Explanation:

The '==' operator is used for comparing two values for equality in PHP.

2. What is the function of the '===' operator in PHP?

a) Assignment

b) Equality comparison

c) Identity comparison

d) Addition

Answer:

c) Identity comparison

Explanation:

The '===' operator checks if two values are equal and of the same type.

3. Which operator is used for string concatenation in PHP?

a) +

b) .

c) &

d) #

Answer:

b) .

Explanation:

The '.' operator is used to concatenate strings in PHP.

4. What does the '!=' operator do in PHP?

a) Assigns a value

b) Checks if two values are not equal

c) Subtracts one value from another

d) Divides two values

Answer:

b) Checks if two values are not equal

Explanation:

The '!=' operator is used to check if two values are not equal in PHP.

5. How is the modulus operation performed in PHP?

a) Using the % operator

b) Using the mod() function

c) Using the / operator

d) Using the // operator

Answer:

a) Using the % operator

Explanation:

The '%' operator is used to perform modulus operation in PHP, which gives the remainder of a division.

6. Which operator increases a variable's value by one in PHP?

a) ++

b) --

c) +=

d) -=

Answer:

a) ++

Explanation:

The '++' operator is used to increment a variable's value by one in PHP.

7. What is the purpose of the '&&' operator in PHP?

a) To perform addition

b) To concatenate strings

c) To perform logical AND operation

d) To compare two values

Answer:

c) To perform logical AND operation

Explanation:

The '&&' operator is used to perform a logical AND operation in PHP.

8. How do you check if a variable $x is less than or equal to 10 in PHP?

a) $x < 10

b) $x <= 10

c) $x =< 10

d) $x == 10

Answer:

b) $x <= 10

Explanation:

The '<=' operator checks if a value is less than or equal to another.

9. What does the '??' operator do in PHP?

a) Null coalescing operator

b) Ternary operator

c) Concatenation operator

d) Equality operator

Answer:

a) Null coalescing operator

Explanation:

The '??' operator is used as the null coalescing operator in PHP, returning its first operand if it exists and is not null, otherwise its second operand.

10. Which operator is used to compare two values for inequality in PHP?

a) !=

b) ==

c) ===

d) <=>

Answer:

a) !=

Explanation:

The '!=' operator is used to compare two values for inequality.

11. What is the result of the spaceship operator '1 <=> 2' in PHP?

a) 1

b) 0

c) -1

d) 2

Answer:

c) -1

Explanation:

The spaceship operator '<=>' returns -1 if the left operand is less than the right, 0 if they are equal, and 1 if the left is greater.

12. Which operator is used for error control in PHP?

a) @

b) #

c) !

d) ?

Answer:

a) @

Explanation:

The '@' operator is used for error control in PHP to suppress error messages.

13. How do you perform a bitwise AND operation in PHP?

a) &

b) &&

c) AND

d) &&

Answer:

a) &

Explanation:

The '&' operator is used for bitwise AND operations in PHP.

14. What does the '<<<' operator represent in PHP?

a) Left shift

b) Right shift

c) Heredoc syntax

d) Nowdoc syntax

Answer:

c) Heredoc syntax

Explanation:

The '<<<' operator is used to start the Heredoc syntax for string declaration in PHP.

15. What is the use of the ternary operator '?:' in PHP?

a) To perform division

b) To assign values

c) To perform a short form of if-else

d) To check equality

Answer:

c) To perform a short form of if-else

Explanation:

The ternary operator '?:' is a shorthand for the if-else conditional statement in PHP.