FirstCry Data Science Interview Questions and Answers

Developed a machine learning model to predict customer churn for a telecommunications company.

• Collected and cleaned customer data including demographics, usage patterns, and customer service interactions.

• Used classification algorithms such as logistic regression and random forest to build the predictive model.

• Evaluated model performance using metrics like accuracy, precision, recall, and ROC curve.

• Implemented the model...read more

Cosine similarity is a measure of similarity between two non-zero vectors of an inner product space.

• It measures the cosine of the angle between two vectors.

• Values range from -1 (completely opposite) to 1 (identical), with 0 indicating orthogonality.

• Used in recommendation systems, text mining, and clustering algorithms.