《Cracking the Coding Interview》——第12章：测试——题目5·

2014-04-25 00:41

题目：怎么测试一支笔？（Pen？您老说的是钢笔？）

解法：这种简约而不简单的题目，实在是面试官最喜欢，面试者最头疼的类型了。面试官可以只花三秒，以一种灰常高贵冷艳的语气甩出这道题。然后头疼脑热的就是你了。怎么做呢？Brainstorming，找特征，分解问题，关联问题和特征，然后按规矩解题。我个人觉得这类题其实不是考察创意，而是考察发现问题、分析问题、解决问题的思路是否够清晰，就算解不出来也没事的。

代码：

// 12.5 How would you test a pen?
// Answer:
//    1. A pen uses ink.
//    2. A pen usually writes on paper.
//    3. The volume of ink in the pen is usually small.
//    4. Sometimes when the pen is used for too long, we wash the pen with water and dry it.
//    5. When drawing ink from the ink bottle, we squeeze the ruber tube and releases it to draw the ink up into the pen.
// Above all the things, there are a few things to be tested:
//    1. the ruber tube which contains the ink.
//        1.a. is it elastic enough?
//    2. a very thin pipe, from which ink flows into the pen.
//        2.a. is it easily blocked?
//        2.b. does it break easily?
//    3. the upper cover, which protects the ruber tube inside it.
//        3.a. can the whorl fit tight?
//        3.b. is the cover firm enough? does it crack easily?
//    4. the tip of the pen, through which the ink flow out.
//        4.a. it is actually a pipe, does it block easily?
//        4.b. write it on different paper textures, does it write smoothly?
//        4.c. it is steel, does it rust easily?
int main()
{
    return 0;
}