Interview Q&A / Data Science
Data Science interview questions
Statistics, pandas, cleaning data and exploratory analysis for analyst and data science roles.
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- What is the difference between merge, join and concat in pandas?
merge combines two DataFrames on matching column values, like a SQL join. join does the same but matches on the index by default. concat simply stacks DataFrames on top of each other (rows) or side by side (columns) without matching any keys.
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