PHP面向对象-测试题(6~10)

最新推荐文章于 2021-03-11 01:41:31 发布

原创最新推荐文章于 2021-03-11 01:41:31 发布 · 1.8k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#php #测试 #serialization #overloading #class #function

本文包含了一系列关于PHP编程语言的面试题目，覆盖了从PHP4到PHP5的重要特性变化，包括对象继承、接口、抽象方法、构造函数、序列化机制及类方法调用等内容，适合用于评估应聘者的PHP基础知识和技术水平。

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