WePay数据相关面经_WePay数据相关面试真题及高频题

1.大写首字母

2.Fibonacci Number

3.checksum

4.Fraud

5.KPI变化原因

6.Flatten Nested List Iterator

7.离职概率

8.求 y = max(x_i) 的pdf

9.Add Two Numbers

10.Integer Palindrome

11.Are the two words anagrams of each other?

1. 大写首字母

给一个string，把每个单词的首字母大写

2. Fibonacci Number

The Fibonacci numbers, commonly denoted F(n) form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1. That is,

F(0) = 0, F(1) = 1

F(n) = F(n - 1) + F(n - 2), for n > 1.

Given n, calculate F(n).

3. checksum

输入一个string把它倒过来，every second digit翻倍，如果翻倍后是两位数把它每一位当作一个digit处理，最后把所有digit加起来

e.g. 4567->7654->7 12 5 8->7+1+2+5+8=23

4. Fraud

聊聊fraud 的类型，每种fraud 怎么做model比较好

5. KPI变化原因

一个kpi上去了，你怎么找出原因