Cool start up looking for two PHP coders

As a next step, please answer the programming tasks below as soon as possible to be considered for the position. 1. In a language of your choice, write a function that gets a string as an argument and returns true if the string starts with an upper case letter and false if it starts with a lower case letter. You can assume the argument strings will only include letters in the English alphabet. 2. Explain why the statement array("asdf") === array("asdf") returns true in PHP but the equivalent statement Array("asdf") === Array("asdf") returns false in JavaScript. 3. In JavaScript, write code that alerts "Mikä on elämän tarkoitus?" when the following statement is executed: window["mikä"]("on")("elämän")("tarkoitus")("?") window refers to the JavaScript global object. 4. Scenario: An administrator writes up a plaintext (no HTML) article in a website administration backend and submits it. The article needs to be saved in a database and an error message or success message along with the created article that is correctly formatted must be output to the administrator. From the point of view of MVC architecture, explain what happens in each tier in both success and error cases. 5. What do you think the following code is trying to accomplish? $koodi = ''; $k = 0; while ($[login to view URL]().$k),$alku,$alku+10); $korvattavat = array("0","O","l","I","1"); $possible = "23456789abcdfghjkmnpqrstvwxyz"; $char = substr($possible, mt_rand(0, strlen($possible)-1), 1); $koodi = str_replace($korvattavat,$char,$koodi); $query = "SELECT code FROM #__com_groovefactory_gig_codes WHERE code='".$koodi."'"; $db->setQuery($query); $db->query(); if ($db->getNumRows()==0) break; $k++; } Is there anything wrong with the approach the code takes to solve the problem? If yes, what would you do to improve it?