What is 19+NULL in SQL
Data Science Stage Interview Questions
40,238 data science stage interview questions shared by candidates
SQL questions: 1) What is the default order of ORDER BY? 2) What is the result of 1+null? 3) How to select from two tables? 4) What command id used together with GROUP BY?
Given a list, create a new list that does not include duplicate values of the original list.
Linear Regression Assumptions, Boosting and Bagging. Regularisation, Feature Selection Methods, Forecasting
Price optimization
Explain the difference between type 1 and type 2 error.
Go through resume and many case study.
Make sure to study recommendation engines, since this is the bread and butter of their work. They don't really have any interest in your work experience, like many tech interviews.
Lots of coding questions and data analysis tasks.
Given a dataset which we cannot even see properly on hackerrank, build 2 ML models and answer insight related questions within 2 hours. It made no sense. The dataset was in raw form, had to be studied and converted into features and target, split for training/testing and report accuracy. This is not how a data science task can be completed.
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