What is the purpose of the array_key_exists() function in PHP?

What is the purpose of the array_push() function in PHP?

A). To remove elements from an array

B). To add elements to the beginning of an array

C). To add elements to the end of an array

D). To reverse the order of elements in an array

Which PHP function is used to determine the number of elements in an array?

A). size()

B). count()

C). length()

D). elements()

Which PHP function is used to sort an array in ascending order, maintaining the key-value pairs?

A). sort()

B). ksort()

C). asort()

D). rsort()

Which of the following statements is true about associative arrays in PHP?

A). They only allow numeric indices

B). They store elements in a sequential order

C). They use key-value pairs to access elements

D). They cannot be accessed using loop constructs

What is the correct syntax for creating a multidimensional array in PHP?

A). $array = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));

B). $array = array([1, 2, 3], [4, 5, 6], [7, 8, 9]);

C). $array = array{1, 2, 3}, {4, 5, 6}, {7, 8, 9};

D). $array = array{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};

What will be the output of the following PHP code?
<?php
$info = array('name' => 'John', 'age' => 30, 'city' => 'New York');
echo array_key_exists('age', $info) ? 'Yes' : 'No';
?

A). Yes

B). No

C). John

D). 30

What will be the output of the following PHP code?
<?php
$matrix = array(
array(1, 2, 3),
array(4, 5, 6),
array(7, 8, 9)
);
echo $matrix[1][2];
?

A). 1

B). 2

C). 4

D). 6

Which PHP function is used to extract a slice of an array?

A). splice()

B). slice()

C). extract()

D). split()

Which PHP function is used to remove the last element from an array?

A). remove()

B). pop()

C). delete()

D). unset()

What will be the output of the following PHP code?
<?php
$arr1 = array('a', 'b', 'c');
$arr2 = array(1, 2, 3);
$result = array_merge($arr1, $arr2);
foreach ($result as $item) {
echo $item . ' ';
}
?

A). a b c 1 2 3

B). 1 2 3 a b c

C). a b c

D). 1 2 3