PHP files have a default file extension of _____

  DocBlocks are indicated by opening a comment using _________ 

Which one of the following function is used to retrieve the MX records for the domain specified by hostname? 

   Which one of the following statements instantiates the mysqli class? 

You can extend the exception base class, but you cannot override any of the preceding methods because the are declared as__________ 

 Which one of the following filter is used to filter several variables with the same or different filters? 

The _____ line needs to be uncommented or added in the php.ini file to enable the mysqli extension.

Which of the following is/are an exception?

i) BadFunctionCallException
ii) BadMethodCallException
iii) LogicException
iv) DomainException

What will be the output of the following PHP code?

echo str_pad("Abekus", 5)." is best";

What will be the output of the following PHP code?

<?php

$foods = array("pasta", "steak", "fish", "potatoes");

$food = preg_grep("/^s/", $foods);

print_r($food);

?>