Array_php

Which of the following is an example of a numeric array in PHP?

• $arr = ['apple', 'banana', 'cherry'];

• $arr = [1 => 'apple', 2 => 'banana', 3 => 'cherry'];

• $arr = ['a' => 'apple', 'b' => 'banana', 'c' => 'cherry'];

• $arr = [1, 2, 3, 4];

Which PHP function is used to create an associative array?

• array()

• array_assoc()

• assoc_array()

• array_associative()

What is the correct syntax to access a multi-dimensional array element?

• $array[0][1]

• $array{0}{1}

• $array[0->1]

• array[0][1]

Which of the following is an example of a multi-dimensional array?

• $arr = [1, 2, 3, 4];

• $arr = [['apple', 'banana'], ['orange', 'grapes']];

• $arr = [1 => 'apple', 2 => 'banana'];

• $arr = ['name' => 'John', 'age' => 30];

What does the array_key_exists() function check in an associative array?

• If the array is empty

• If a key exists in the array

• If the value exists in the array

• If the array is sorted

1. Which function is used to count all elements in an array?

• count()

• size()

• length()

• array_count()

1. How do you merge two arrays in PHP?

• merge($arr1, $arr2)

• array_merge($arr1, $arr2)

• $arr1 + $arr2

• array_add($arr1, $arr2)

How do you remove an element from an associative array?

• unset($arr['key']);

• remove($arr, 'key');

• delete($arr['key']);

• array_remove($arr, 'key');

1. Which of the following will output all values of an associative array?

• foreach($arr as $value) { echo $value; }

• foreach($arr as $key => $value) { echo $key

• print_r($arr);

• All of the above

Which PHP function is used to create a numeric array with specific keys?

• array_fill()

• array_map()

• array_keys()

• array_merge()