In this article, we will look at a few probability questions from Data Science Interviews at top companies and outline various solving techniques. Probability and Statistics are the basis of Machine Learning and Data Science. While esoteric algorithms might be the latest shiny thing in town, most aspiring data scientists…

Breaking down the solution to one of the interesting Uber SQL interview questions — Uber is a company that changed inner city travel and made the lives of millions of users much easier. Their main product is a smartphone app that lets users find a ride for a reasonable price. Uber is involved in a number of other businesses, such as food delivery, shipments…

A three step solution to an SQL question asked during an interview at the ride-hailing company — Nearly 20 million people use Lyft to move around their cities. The company’s main product is a user-friendly mobile application that allows users to seamlessly move from point A to point B. Behind the user friendliness of the smartphone app, Lyft puts a lot of effort into collecting and analyzing…

This article will teach you how to solve one of the hard Airbnb data scientist interview questions — Airbnb is one of the most popular companies for data scientists. It’s in the lodging and the hospitality industry. While traditionally, you wouldn’t expect this to be an industry of high interest for data scientists, Airbnb is different. And this difference, of course, reflects in the fact they operate as…

Prepare for an interview to get the data scientist job at Amazon — Amazon is an e-commerce giant and one of the most valuable brands in the world. Data collection and analysis is the key to Amazon’s business model. The e-commerce giant uses data to personalize user experience, create and design products, and even to improve the efficiency of their business operations. Considering…

What is data literacy? What should you know to become data literate? We are about to answer these two questions that might be bugging you for a while. — You like reading, right? Well, you wouldn’t read this article if you hadn’t. OK, you’re right: reading this article doesn’t mean you love reading. But reading it for sure means you are, at least partially, literate. The ‘problem’ with reading is once you learn to read, you can’t unlearn it…

Commonly used string and array functions in SQL Data Science Interviews. In a previous article “SQL Scenario Based Interview Questions”, we had touched upon the various date and time functions in SQL. In this article, we will look at another important favorite topic in Data Science Interviews — string and…

The demand for Data Analysts is on the rise — market analysis shows that up to 85% of companies have adopted data analysis technologies — Let’s begin with a simple question: What is a data analyst? Data analysts gather and use data to answer questions and provide solutions to problems. Daily tasks as a data analyst involve: The collection and storage of data Maintaining a clean and organized data structure

This very interesting Python interview question from Goldman Sachs is a good example of a large family of data science interview questions that concern optimization. Learn how the cumulative sum operator can be used to solve such questions. Python Optimization Question Minimum Number of Platforms The title of this question is Minimum Number…