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

What will be the output of the following PHP code?
<?php
$numbers = array(10, 20, 30, 40, 50);
echo count($numbers);
?

A). 10

B). 20

C). 5

D). 50

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 is the output of the following PHP code?
<?php
$colors = array('Red', 'Green', 'Blue');
echo $colors[1];
?

A). Red

B). Green

C). Blue

D). 1

What will be the output of the following PHP code?
<?php
$colors = array('Red' => 1, 'Green' => 2, 'Blue' => 3);
asort($colors);
foreach ($colors as $color => $value) {
echo '$color: $value ';
}
?

A). Red: 1 Green: 2 Blue: 3

B). 1: Red 2: Green 3: Blue

C). 1: Blue 2: Green 3: Red

D). Red: 3 Green: 2 Blue: 1

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
$numbers = array(10, 20, 30, 40, 50);
array_pop($numbers);
foreach ($numbers as $number) {
echo $number . ' ';
}
?

A). 20 30 40 50

B). 10 20 30 40

C). 10 20 30 40

D). 10 20 30 40 50

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 will be the output of the following PHP code?
<?php
$person = array('name' => 'John', 'age' => 30, 'city' => 'New York');
echo $person['age'];
?

A). name: John

B). age: 30

C). city: New York

D). John

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

What type of index do indexed arrays in PHP use?

A). String

B). Integer

C). Key-value pairs

D). Floating-point number