《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 ;
 }