<?php
$matrix = array(
array(1, 2, 3),
array(4, 5, 6),
array(7, 8, 9)
);
echo $matrix[1][2];
?
What type of index do indexed arrays in PHP use?
A). String
B). Integer
C). Key-value pairs
D). Floating-point number
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
$colors = array('Red' => 1, 'Green' => 2, 'Blue' => 3);
asort($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 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
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 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
Which PHP construct is commonly used to iterate over elements of an array?
A). foreach loop
B). while loop
C). do-while loop
D). for loop
Which PHP function is used to determine the number of elements in an array?
A). size()
B). count()
C). length()
D). elements()