每日一练 | Data Scientist & Business Analyst & Leetcode 面试题 364

大数据应用 · 公众号 · 大数据 · 2018-05-26 09:00

正文

点击上方蓝字会变美

“

每

日

一

练

”

MAY

Data Application Lab 自2017年6月15日起，每天和你分享讨论一道数据科学(DS)和商业分析(BA) 领域常见的面试问题。

自2017年10月4日起，每天再为大家分享一道Leetcode 算法题。

希望积极寻求相关领域工作的你每天关注我们的问题并且与我们一起思考，我们将会在第二天给出答案。

Day

264

DS Interview Question

What are the advantages of ReLU over sigmoid function?

BA Interview Question

How would you convince management that a business analyst is needed within a team?

LeetCode Question

Pascal’s Triangle

Description:

Given numRows, generate the first numRows of Pascal’s triangle.

Input: 5

Output:

[

[1],

[1,1],

[1,2,1],

[1,3,3,1],

[1,4,6,4,1]

]

Day

263

答案揭晓

DS Interview Question & Answer

Describe the basic layer structure of ANN and what each part represent for.

Answer:

A neural network may contain the following 3 layers:
Input layer – The activity of the input units represents the raw information that can feed into the network.
Hidden layer – To determine the activity of each hidden unit. The activities of the input units and the weights on the connections between the input and the hidden units. There may be one or more hidden layers.
Output layer – The behavior of the output units depends on the activity of the hidden units and the weights between the hidden and output units.

BA Interview Question & Answer

SQL Interview questions practices: Imagine we have two tables names ‘employees’ and ‘projects’, write a query to find out employee name and project name who has assigned more than one project.