In PHP 7.1, which of the following options can be used to mark the type declarations for parameters and return values as nullable, by prefixing the type name?

In relation to PHP array cast, Booleans can be cast to which of the following options?

Output of the following PHP 7.1 code snippet? - abstract class A_Class { abstract protected function name_P($name); } class Example extends A_Class { public function Name_P($name, $separator = '.') { if ($name == 'Mango') { $product = 'Fruit'; } elseif ($name == 'Carrot') { $product = 'Vegitable'; } else { $product =''; } return '{$name}{$separator} {$product}'; } } $class = new Example; echo $class->Name_P('Mango'), '\n'; echo $class->Name_P('Carrot'), '\n'; ?>

Output of the following PHP code? var_dump('pqrstu'[-2]); var_dump(strpos('ppqqrr','q', -3)); ?>

In relation to PHP 7.1 global space, prefixing a name with which of the following options specifies that the name is required from the global space even in the context of the namespace?

Include files must have the file extension '.inc'

How do you kill or destroy a session?

Which function is used to check type of array

How do you write 'Hello World'?

Correct way to include the file 'time.inc'?