PHP Arrays and Array Functions – MCQs

1. Which of the following is a correct way to define an indexed array in PHP?

a) $colors = array("red", "green", "blue");
b) $colors = "red", "green", "blue";
c) array = $colors("red", "green", "blue");
d) $colors = ["red" => 0, "green" => 1, "blue" => 2];

2. How do you access the first element of an indexed array $fruits = array("apple", "banana", "cherry");?

a) $fruits[1];
b) $fruits[0];
c) $fruits("0");
d) $fruits->0;

3. Which array type uses named keys that you assign manually?

a) Indexed array
b) Associative array
c) Multidimensional array
d) Constant array

4. What is the output of the following?

      $person = array("name" => "John", "age" => 30);   
		echo $person["age"]; 
      

a) name
b) John
c) 30
d) Error

5. What is a multidimensional array in PHP?

a) An array containing a string and an integer
b) An array with duplicate values
c) An array containing one or more arrays
d) An array with numbered keys

6. Which function counts all elements in an array?

a) size()
b) total()
c) count()
d) sum()

7. What does array_keys($array) return?

a) All values in the array
b) Number of keys
c) An array of keys
d) The last key of the array

8. How do you loop through an associative array in PHP?

a) foreach($array as $value)
b) foreach($array as $key => $value)
c) for($i = 0; $i < count($array); $i++)
d) while($array)

9. Which function merges two arrays in PHP?

a) combine_array()
b) merge()
c) array_merge()
d) array_join()

10. What is the result of in_array("blue", $colors) if $colors = array("red", "blue", "green")?

a) true
b) false
c) 1
d) "blue"

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