Specialization Track

Data Science & Analytics Interview Questions & Answers

Statistical modeling, hypothesis testing, feature engineering, SQL data pipelines, and exploratory data analysis.

Easy 5 views

What questions should you ask before filling missing values in a dataset?

Ask what each missing value means, how it was recorded, and whether absence is related to the outcome or another variable. A missing purchase amount might mean a failed data transfer, an unavailable m...

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How do mean and median behave differently when salaries contain extreme values?

The mean uses every value and can move substantially when a few salaries are very high. The median is the middle ordered value and is less sensitive to those extremes. For a highly skewed salary distr...

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