Interview Prep
SQL, Python and case-study questions that actually appear in data analyst interviews, with the pattern behind each one and how to practice it.
24 articles in Interview Prep · Page 3 of 3
Top 20 Machine Learning Interview Questions and Answers (2026 Guide)
Master the top 20 machine learning interview questions: bias-variance tradeoff, regularization, ROC-AUC, XGBoost, and production model evaluation.
Top 20 Pandas Interview Questions and Coding Answers (2026 Guide)
Master Pandas interview questions with practical DataFrame coding solutions, loc vs iloc, groupby aggregations, merging, and memory optimization.
Top 20 Python Basic Interview Questions and Answers (2026 Guide)
Master the top 20 python basic interview questions: list vs tuple, mutable vs immutable, decorators, generators, and core coding questions with answers.
Top 20 REST API Interview Questions and Answers (2026 Guide)
Master the top 20 rest api interview questions: idempotency, PUT vs PATCH, status codes, JWT authentication, rate limiting, and REST vs GraphQL.
A/B Testing in Python: From Sample Size to p-Value Without the Ritual
Run A/B tests in Python the right way — simulate control vs variant, check SRM, run chi-square and t-tests, and read p-values correctly.
Product Funnel Analysis: Where Users Drop and How to Prove It in Python
Track users from landing page to purchase in Python — build a funnel, calculate step conversion, and visualise drop-off with Plotly.