PHP物件導向-測試題(6~10)

6. What OOP construct unavailable in PHP 4 does the following script approximate?

class my_class
{
  function my_funct ($my_param)
  {
    user_error ("Please define me", E_ERROR);
  }
  function b()
  {
    return 10;
  }
}

A. Multiple inheritance
B. Interfaces
C. Abstract methods
D. Private methods
E. Function overloading

7. Assume that a class called testclass is defined. What must the name of its constructor method be?
A. __construct
B. initialize
C. testclass
D. __testclass
E. Only PHP 5 supports constructors

8. How can a class override the default serialization mechanism for its objects?
A. By implementing the __shutdown and __startup methods
B. By calling register_shutdown_function()
C. By implementing __sleep() and __wakeup()
D. The default serialization mechanism cannot be overridden
E. By adding the class to the output buffering mechanism using ob_start()

9. In PHP 4, which object-oriented constructs from the following list are not available?
- Abstract classes
- Final classes
- Public, private, protected (PPP) methods
- Interfaces
A. Abstract classes
B. PPP methods
C. Neither PPP methods nor interfaces
D. None of the above are available
E. All of the above are available

10. How would you call the mymethod method of a class within the class itself?
A. $self=>mymethod();
B. $this->mymethod();
C. $current->mymethod();
D. $this::mymethod();
E. None of the above are correct