Python Interviews

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Python Interview Questions for Data/Business Analysts in MNC: Question 1: Given a dataset in a CSV file, how would you read it into a Pandas DataFrame? And how would you handle missing values? Question 2: Describe the difference between a list, a tuple, and a dictionary in Python. Provide an example for each. Question 3: Imagine you are provided with two datasets, 'sales_data' and 'product_data', both in the form of Pandas DataFrames. How would you merge these datasets on a common column named 'ProductID'? Question 4: How would you handle duplicate rows in a Pandas DataFrame? Write a Python code snippet to demonstrate. Question 5: Describe the difference between '.iloc[] and '.loc[]' in the context of Pandas. Question 6: In Python's Matplotlib library, how would you plot a line chart to visualize monthly sales? Assume you have a list of months and a list of corresponding sales numbers. Question 7: How would you use Python to connect to a SQL database and fetch data into a Pandas DataFrame? Question 8: Explain the concept of list comprehensions in Python. Can you provide an example where it's useful for data analysis? Question 9: How would you reshape a long-format DataFrame to a wide format using Pandas? Explain with an example. Question 10: What are lambda functions in Python? How are they beneficial in data wrangling tasks? Question 11: Describe a scenario where you would use the 'groupby()' method in Pandas. How would you aggregate data after grouping? Question 12: You are provided with a Pandas DataFrame that contains a column with date strings. How would you convert this column to a datetime format? Additionally, how would you extract the month and year from these datetime objects? Question 13: Explain the purpose of the 'pivot_table' method in Pandas and describe a business scenario where it might be useful. Question 14: How would you handle large datasets that don't fit into memory? Are you familiar with Dask or any similar libraries? Question 15: In a dataset, you observe that some numerical columns are highly skewed. How can you normalize or transform these columns using Python? Python Interview Q&A: https://topmate.io/coding/898340 Like for more ❤️

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Python Libraries and Frameworks

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