🚀 Most Asked Pandas Interview Questions 🐼

🧠 1. Difference between loc[] and iloc[]

👉 loc[] is label-based indexing, while iloc[] is position-based indexing.

🧠 2. What does isna() do?

👉 It detects missing values and returns a boolean (True/False) mask.

🧠 3. Default axis in drop()

👉 Default is axis=0, which means rows are dropped.

🧠 4. What does groupby() return?

👉 It returns a GroupBy object, not a DataFrame directly.

🧠 5. What happens if fillna() is not assigned?

👉 It returns a new DataFrame; original data remains unchanged.

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