46.
What elements will the following script output?
<?php
$array = array (true => 'a', 1 => 'b');
var_dump ($array);
?>

48.
There are three different kind of arrays:

49.
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?

50.
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?