MCQs on Operators | PHP Basics

Unlock your PHP expertise with this comprehensive set of 30 multiple-choice questions focused on PHP operators. Delve into the world of Arithmetic, Comparison, Logical, Assignment, Increment/Decrement, and String Operators, and solidify your understanding of PHP programming fundamentals. Perfect for developers looking to master PHP for web development projects.

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Topic 1: Arithmetic Operators (5 Questions)

1. What will be the output of the following PHP code?phpCopy codeecho 15 % 4; A) 3
   B) 4
   C) 15
   D) 1
2. Which operator is used for exponentiation in PHP?
   A) ^
   B) **
   C) ^^
   D) exp()
3. What will be the result of the expression 10 + 5 * 2 in PHP?
   A) 30
   B) 20
   C) 25
   D) 40
4. How can you divide two numbers in PHP?
   A) Using //
   B) Using /
   C) Using %
   D) Using div
5. What will the following code output?phpCopy code$a = 7; $b = 2; echo $a / $b; A) 3
   B) 3.5
   C) 2
   D) 7.0

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Topic 2: Comparison Operators (5 Questions)

6. Which operator checks if two variables are equal in value and type?
   A) ==
   B) ===
   C) !=
   D) <=
7. What does the expression $a != $b mean in PHP?
   A) $a is equal to $b
   B) $a is not equal to $b
   C) $a is less than $b
   D) $a is greater than $b
8. How do you check if a value is greater than or equal to another value?
   A) =<
   B) =>
   C) >=
   D) =>=
9. What will be the output of the following code?phpCopy codeecho (5 == '5') ? 'True' : 'False'; A) True
   B) False
   C) Error
   D) Null
10. Which operator checks if a variable is not identical (different type or value)?
    A) !==
    B) !=
    C) ===
    D) ==

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Topic 3: Logical Operators (5 Questions)

11. Which logical operator is used to combine conditions where both must be true?
    A) ||
    B) &&
    C) and
    D) or
12. What does the expression !false return?
    A) True
    B) False
    C) Null
    D) 1
13. How would you check if either condition A or condition B is true in PHP?
    A) A || B
    B) A && B
    C) A & B
    D) A | B
14. What will the following expression output?phpCopy codeecho (true && false) ? 'Yes' : 'No'; A) Yes
    B) No
    C) Error
    D) True
15. Which operator has higher precedence, && or ||?
    A) &&
    B) ||
    C) Both have the same
    D) Depends on the context

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Topic 4: Assignment Operators (5 Questions)

16. What does the expression $a += 5 mean?
    A) $a = $a + 5
    B) $a = 5
    C) $a = $a * 5
    D) $a + 5 = 0
17. Which assignment operator is used to concatenate strings?
    A) .=
    B) ++
    C) ==
    D) +=
18. How can you decrease a variable by 3 in PHP?
    A) $var -= 3
    B) $var =- 3
    C) $var = 3-
    D) $var := 3
19. What does the expression $b *= 3 do?
    A) Multiplies $b by 3
    B) Divides $b by 3
    C) Adds 3 to $b
    D) Sets $b to 3
20. Which operator is used to assign by reference?
    A) =>
    B) ==
    C) &=
    D) = &

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Topic 5: Increment/Decrement Operators (5 Questions)

21. What does $x++ do in PHP?
    A) Decreases $x by 1
    B) Increases $x by 1
    C) Returns $x + 1 without changing $x
    D) Returns $x – 1 without changing $x
22. What will be the value of $y after this code?phpCopy code$y = 10; $y--; A) 11
    B) 10
    C) 9
    D) 0
23. Which of the following is the correct way to decrement a variable?
    A) var++
    B) –var
    C) var–
    D) ++var
24. What will the following code output?phpCopy code$a = 5; echo ++$a; A) 5
    B) 6
    C) 4
    D) 7
25. What happens when you use --$x in PHP?
    A) The value is increased by 1
    B) The value is decreased by 1
    C) No change
    D) Sets $x to 0

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Topic 6: String Operators (5 Questions)

26. Which operator is used to concatenate two strings in PHP?
    A) +
    B) .
    C) ,
    D) &
27. What does the expression $str1 .= $str2 do?
    A) Assigns $str2 to $str1
    B) Adds $str2 to $str1
    C) Concatenates $str2 to $str1
    D) Compares $str1 and $str2
28. How would you append a string to an existing variable in PHP?
    A) .=
    B) =.
    C) +=
    D) ==
29. What is the result of the following code?phpCopy code$text = "Hello"; $text .= " World"; echo $text; A) Hello
    B) HelloWorld
    C) Hello World
    D) World
30. What will $var1 . $var2 output if $var1 = "PHP" and $var2 = "Rocks"?
    A) PHP Rocks
    B) PHPRocks
    C) PHP.Rocks
    D) PHP-Rocks

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Answer Key

Qno	Answer (Option with the text)
1	A) 3
2	B) **
3	C) 25
4	B) Using /
5	B) 3.5
6	B) ===
7	B) $a is not equal to $b
8	C) >=
9	A) True
10	A) !==
11	B) &&
12	A) True
13	A) A
14	B) No
15	A) &&
16	A) $a = $a + 5
17	A) .=
18	A) $var -= 3
19	A) Multiplies $b by 3
20	D) = &
21	B) Increases $x by 1
22	C) 9
23	C) var–
24	B) 6
25	B) The value is decreased by 1
26	B) .
27	C) Concatenates $str2 to $str1
28	A) .=
29	C) Hello World
30	B) PHPRocks