PHP ARRAYS QUIZ | EXAMIANS

Assume you would like to sort an array in ascending order by value while preserving key associations. Which of the following PHP sorting functions would you use?

sort()

krsort()

ksort()

asort()

usort()

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the output of the following PHP code? $array1 = array ("KA", "LA", "CA", "MA", "TA"); $array2 = array ("KA", "IA", "CA", "GA", "TA"); $inter = array_intersect ($array1, $array2); print_r ($inter);

Array ( [1] => IA [3] => GA )

Array ( [0] => KA [1] => LA [2] => CA [3] => MA [4] => TA [5] => IA [6] => GA )

Array ( [1] => LA [3] => MA )

Array ( [0] => KA [2] => CA [4] => TA )

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YOUR ANSWER : ?

What array will you get if you convert an object to an array?

An array with properties of that object as the array's elements

An array with keys of that object as the array's elements

An array with properties of that object as the Key elements

An array with properties of that array as the object's elements

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What will be the output of the following PHP code? $fruits = array ("mango", "apple", "pear", "peach"); $fruits = array_flip($fruits); echo ($fruits[0]);

error

peach

mango

0

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YOUR ANSWER : ?

What will be the output of the following php code? $states = array("karnataka" => array( "population" => "11,35,000", "captial" => "Bangalore"),"Tamil Nadu" => array( "population" => "17,90,000","captial" => "Chennai") ); echo $states["karnataka"]["population"];

population 11,35,000

karnataka 11,35,000

11,35,000

karnataka population

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YOUR ANSWER : ?

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

Array ( [c] => blue )

Array ( [d] => yellow )

Array ( [e] => yellow )

Array ( [a] => red )

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YOUR ANSWER : ?

Absent any actual need for choosing one method over the other, does passing arrays by value to a read-only function reduce performance compared to passing them by reference?

Yes, but only if the array is large.

No

Yes, but only if the function modifies the contents of the array.

Yes, because PHP must monitor the execution of the function to determine if changes are made to the array.

Yes, because the interpreter must always create a copy of the array before passing it to the function.

TRUE ANSWER : ?
YOUR ANSWER : ?

PHP’s numerically indexed array begin with position ______.

0

1

2

-1

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YOUR ANSWER : ?

Which array function checks if the specified key exists in the array?

array_key_exists()

array_keys_exists()

array_key_exist()

arrays_key_exists()

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YOUR ANSWER : ?

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

Array ( [0] => Array ( [1] => Volvo [2] => BMW ) [1] => Array ( [1] => Toyota [2] => Honda ) [2] => Array ( [1] => Mercedes [2] => Opel ) )

Array ( [1] => Array ( [1] => Volvo [2] => BMW ) [2] => Array ( [1] => Toyota [2] => Honda ) [3] => Array ( [1] => Mercedes [2] => Opel ) )

Array ( [0] => Array ( [0] => Volvo [1] => Volvo ) [1] => Array ( [0] => BMW [1] => BMW ) [2] => Array ( [0] => Toyota [1] => Toyota ) )

Array ( [0] => Array ( [0] => Volvo [1] => BMW ) [1] => Array ( [0] => Toyota [1] => Honda ) [2] => Array ( [0] => Mercedes [1] => Opel ) )

TRUE ANSWER : ?
YOUR ANSWER : ?

Assume you would like to sort an array in ascending order by value while preserving key associations. Which of the following PHP sorting functions would you use?

What will be the output of the following PHP code?<br/>$array1 = array ("KA", "LA", "CA", "MA", "TA");<br/>$array2 = array ("KA", "IA", "CA", "GA", "TA");<br/>$inter = array_intersect ($array1, $array2);<br/>print_r ($inter);

What array will you get if you convert an object to an array?

What will be the output of the following PHP code?<br/>$fruits = array ("mango", "apple", "pear", "peach");<br/>$fruits = array_flip($fruits);<br/>echo ($fruits[0]);

What will be the output of the following php code?<br/>$states = array("karnataka" => array( "population" => "11,35,000", "captial" => "Bangalore"),"Tamil Nadu" => array( "population" => "17,90,000","captial" => "Chennai") );<br/>echo $states["karnataka"]["population"];

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

Absent any actual need for choosing one method over the other, does passing arrays by value to a read-only function reduce performance compared to passing them by reference?

PHP’s numerically indexed array begin with position ______.

Which array function checks if the specified key exists in the array?

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