Verisk Analytics ml engineer Interview Questions and Answers

Quant ,reasoning and english questions level of difficulty is easy

Mcqs on Machine learning were asked in depth questions were asked

Q1. How can we select K value for KNN algo?
Ans. 
K value for KNN algo can be selected using techniques like cross-validation, grid search, and elbow method.
• Use cross-validation to find the optimal K value by splitting the data into training and validation sets multiple times.

• Perform grid search by testing a range of K values and selecting the one with the highest accuracy.

• Apply the elbow method by plotting the K values against the error rate and selecting the K value...read more
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Q2. Difference between Having and Where
Ans. 
HAVING is used with GROUP BY to filter groups, WHERE is used to filter rows
• HAVING is used with GROUP BY clause to filter groups based on aggregate functions

• WHERE is used to filter rows based on conditions

• HAVING is applied after GROUP BY, WHERE is applied before GROUP BY

• Example: SELECT department, AVG(salary) FROM employees GROUP BY department HAVING AVG(salary) > 50000

• Example: SELECT * FROM employees WHERE age >
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