Interview Q&A – Data Science in Tamil

By admin
January 3, 2026
Interview Q&A

Top Python Libraries for Data Visualization

Popular Python Data Visualization Tools These tools help you convert data into clear, attractive, and meaningful visualizations. 1. Matplotlib – Basic and Highly Customizable Matplotlib is the foundational plotting library in Python. It allows...

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By admin
January 3, 2026
Interview Q&A

Top Data Science Interview Questions with Answers: Part-5

41. What are hyperparameters? Hyperparameters are external configurations of a model set before training (unlike parameters learned during training). Examples: learning rate, number of trees (in Random Forest), max depth, k in KNN....

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Interview Q&A

By admin
January 2, 2026

Top Data Science Interview Questions with Answers: Part-4

31. What is Decision Tree vs Random Forest? •⁠ ⁠Decision Tree is a single tree structure that splits data into branches using feature values to make decisions. It's simple but prone to overfitting....

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Interview Q&A

By admin
January 2, 2026

Top Data Science Interview Questions with Answers: Part-3

21. Difference between PCA and LDA •⁠ ⁠PCA (Principal Component Analysis): Unsupervised technique that reduces dimensionality by maximizing variance. It doesn’t consider class labels. •⁠ ⁠LDA (Linear Discriminant Analysis): ...

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Interview Q&A, Uncategorized

By admin
January 2, 2026

Top Data Science Interview Questions with Answers: Part-2

11. Explain Type I and Type II errors Type I Error (False Positive): Rejecting a true null hypothesis. Example: Saying a drug works when it doesn’t. Type II Error (False Negative): Failing...

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Interview Q&A

By admin
December 23, 2025

Top Data Science Interview Questions with Answers: Part-1

1. What is data science? Data science is an interdisciplinary field that uses statistics, computer science, and domain knowledge to extract insights and knowledge from data (structured and unstructured). It involves data collection,...

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Interview Q&A

By admin
December 23, 2025

Top Power BI Interview Questions with Answers – Part 4

31. What are tooltips in Power BI? Tooltips are small popups that appear when you hover over a data point on a visual. They provide additional context, like values or percentages. You can...

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Interview Q&A

By admin
December 22, 2025

Top Power BI Interview Questions with Answers: Part-3

21. What are custom visuals in Power BI? Custom visuals are user-created or third-party visuals beyond the default ones in Power BI (e.g., Sankey charts, heat maps). They can be downloaded from Microsoft AppSource...

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Interview Q&A

By admin
December 21, 2025

Top Power BI Interview Questions with Answers: Part-2

11. What is a dashboard vs a report? Report: A multi-page, detailed view of your data with multiple visuals per page. Built in Power BI Desktop. Dashboard: A single-page summary of visuals pinned from...

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Interview Q&A

By admin
December 20, 2025

Top Power BI Interview Questions with Answers: Part-1

1️⃣ What is Power BI?Power BI is a business analytics tool by Microsoft that allows users to visualize data, build interactive reports, and gain insights. It connects to various data sources, transforms raw data,...

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