每日一练 | Data Scientist & Business Analyst & Leetcode 面试题 299

DS Interview Questions

What are hash table collisions? How is it avoided?

BA Interview Questions

Using the following variables:

x=1

i=c(1:10)

## write a for() loop that increments x by two for each i.

Leetcode Questions

Description:

• A peak element is an element that is greater than its neighbors.

• Given an input array where num[i] ≠ num[i+1], find a peak element and return its index.

• The array may contain multiple peaks, in that case return the index to any one of the peaks is fine.

Input: [1, 2, 3, 1]

Output: 2

Assumptions:

• You may imagine that num[-1] = num[n] = -∞

DS Interview Questions

How would you create a taxonomy to identify key customer trends in unstructured data?

BA Interview Questions

R language:

Use the ‘rivers’ dataset to write a for loop. The loop prints the dataset:

rivers shorter than 500 are a ‘short river’;

rivers longer than 2000 are a ‘long river’;

and rivers in the middle range are printed in their original numbers.

Leetcode Questions

Description:

• Write a program to find the node at which the intersection of two singly linked lists begins.

Input:

A:          a1 → a2

↘

c1 → c2 → c3

↗

B:     b1 → b2 → b3