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Explain overfitting vs underfitting and fixes

Q: Explain overfitting vs underfitting and fixes

This is a Machine Learning interview question from LinkedIn for Machine Learning Engineer roles. View the full question and solution on PracHub.

Feb 8, 2026, 12:00 AM

Machine Learning Engineer

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Question

What are overfitting and underfitting ?
How can you diagnose each using training/validation metrics?
What are common mitigations for each?

Assume a supervised learning setting (classification or regression).

Solution

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