PHP Object Test – 2

1. Which version of PHP introduced class type hints?

2. Prior to which version of PHP did constructors took the name of the enclosing class.

3. Inheritance is the means by which one or more classes can be derived from a/an ___________ class.

4. What will be the output of the following PHP code?

<?php
class ParentClass
{
}

class MyClass extends ParentClass
{
}

$a = new MyClass;

var_dump($a instanceof MyClass);
var_dump($a instanceof ParentClass);
?>

5. What should be used to refer to a method in the context of a class rather than an object you use?

6. What will be the output of the following PHP code?

<?php
interface MyInterface
{
}

class MyClass implements MyInterface
{
}

$a = new MyClass;

var_dump($a instanceof MyClass);
var_dump($a instanceof MyInterface);
?>

7. Which method or property can only be accessed from within the enclosing class? Even subclasses have no access.

8. What will be the output of the following PHP code?

<?php
class MyClass
{
}

$a = new MyClass;
var_dump(!($a instanceof stdClass));
?>

9. What will be the output of the following PHP code?

<?php
class MyClass
{
}

class NotMyClass
{
}
$a = new MyClass;

var_dump($a instanceof MyClass);
var_dump($a instanceof NotMyClass);
?>

10. A mutator method is also called as ___________