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Python & Programming100 questions · 615 automated tests
Realistic data and AI engineering problems with hints, automated tests and hidden reference solutions.
NumPy & Pandas67 tasks · 2 phases + final challenge
Practise NumPy on a synthetic factory sensor dataset, from guided tasks to a final dashboard challenge.
NumPy & Pandas75 challenges · 2 phases + capstone
Guided, then independent Pandas challenges, ending in an end-to-end customer retention report.
SQL171 questions · 3 capstones · final assessment
SQL for data and AI roles on a 32-table SaaS dataset, validated on PostgreSQL and MySQL.
Career Roadmaps9 stages · 4 portfolio projects · 12-week plan
A step-by-step path from Python basics to real ML projects.