<?php
$info = array('name' => 'John', 'age' => 30, 'city' => 'New York');
echo array_key_exists('age', $info) ? 'Yes' : 'No';
?
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()
What is the purpose of the array_key_exists() function in PHP?
A). To check if a specified key exists in an array
B). To check if a specified value exists in an array
C). To retrieve all keys from an array
D). To retrieve all values from an array
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 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
$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 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
What will be the output of the following PHP code?<?php
$arr = array(10, 20, 30, 40, 50);
$slice = array_slice($arr, 2);
foreach ($slice as $item) {
echo $item . ' ';
}
?
A). 10 20 30 40 50
B). 10 20
C). 30 40 50
D). 30 40 50
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
What will be the output of the following PHP code?<?php
$colors = array('Red', 'Green', 'Blue');
array_push($colors, 'Yellow', 'Orange');
foreach ($colors as $color) {
echo $color . ' ';
}
?
A). Red Green Blue Yellow Orange
B). Yellow Orange Red Green Blue
C). Green Blue Red Yellow Orange
D). Yellow Orange
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