Arrays MCQ question and answer with solution | PHP Programming

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21.
What will be the output of the following PHP code ? 
<?php
$a1 = array("a" => "red", "b" => "green", "c" => "blue", "d" => "yellow");
$a2 = array("e" => "red","f" => "green", "g" => "blue");
$result = array_intersect($a1, $a2);
print_r($result);
?>

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22.
What will be the output of the following PHP code ? 
<?php
$a = array(12, 5, 2);
echo(array_product($a));
?>

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23.
What will be the output of the following PHP code ? 
<?php
$a = array("a" => "Jaguar", "b" => "Land Rover", "c" => "Audi", "d" => "Maseratti");
echo array_search("Audi", $a);
?>

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24.
What will be the output of the following PHP code ? 
<?php
$city_west = array("NYC", "London");
$city_east = array("Mumbai", "Beijing");
print_r(array_replace($city_west, $city_east));
?>

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25.
What will be the output of the following PHP code ? 
<?php
$people = array("Peter", "Susan", "Edmund", "Lucy");
echo pos($people);
?>

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26.
What will be the output of the following PHP code ? 
<?php
$number = range(0, 5);
print_r ($number);
?>

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27.
What will be the output of the following PHP code ? 
<?php
$array = array("red", "green");
array_push($array, "blue", "yellow");
print_r($array);
?>

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28.
What will be the output of the following PHP code? 
<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
print_r(array_change_key_case($age, CASE_UPPER));
?>

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29.
What will be the output of the following PHP code? 
<?php
$cars = array("Volvo", "BMW", "Toyota", "Honda", "Mercedes", "Opel");
print_r(array_chunk($cars, 2));
?>

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30.
What will be the output of the following PHP code? 
<?php
$fname = array("Peter", "Ben", "Joe");
$age = array("35", "37", "43");
$c = array_combine($fname, $age);
print_r($c);
?>

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