每日一练 | Data Scientist & Business Analyst & Leetcode 面试题 366

点击上方 蓝字 会变美

“

”

DS Interview Question

What is the Central Limit Theorem? Explain it. Why is it important?

BA Interview Question

How much time/money is lost due to poorly performed Business Analysis tasks?

LeetCode Question

Best Time to Buy and Sell Stock

Description:

• Say you have an array for which the ith element is the price of a given stock on day i.

• If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an algorithm to find the maximum profit.

Input: [7, 1, 5, 3, 6, 4]

Output: 5

DS Interview Question & Answer

What is the difference between Cluster and Systematic Sampling?

Answer:

Cluster sampling is a technique used when it becomes difficult to study the target population spread across a wide area and simple random sampling cannot be applied. Cluster Sample is a probability sample where each sampling unit is a collection, or cluster of elements. Systematic sampling is a statistical technique where elements are selected from an ordered sampling frame. In systematic sampling, the list is progressed in a circular manner so once you reach the end of the list,it is progressed from the top again. The best example for systematic sampling is equal probability method.

BA Interview Question & Answer

What are the key tasks a Business Analyst would perform within your organization?

Answer:

Depending on the size of the organization these tasks may vary, but might include: