Data Science & SQL Competence Check

Five questions from memory. No sign-up, no email — see the gap between what your résumé claims and what your brain can retrieve.

SQL and data science skills turn raw data into decisions. Being able to write correct JOINs, aggregate with GROUP BY, and evaluate models properly is the difference between real analysis and hand-waving. This skill measures practical fluency with the queries and modeling workflows working analysts and data scientists use daily.