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8 branches of analytics, product and AI interview questions
Explore eight skill tracks, called branches, filterable by subtopic, company, tool and difficulty. SQL questions run against sample tables, choice and numeric answers are checked instantly, and written cases are scored against evaluation criteria.
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6 questions
Sample size for a 2% lift
Compute the per-arm sample size for a conversion test.
Calculation · Design · 8 min · Medium
Experimentation & A/B Testing · Original Uplift question
Sample size for a 1-point conversion lift
Baseline conversion is 10%.
Calculation · Design · 8 min · Medium
Experimentation & A/B Testing · Original Uplift question
What CUPED buys you
ProYour experiments are underpowered and you can't get more users.
Quick check · Design · 7 min · Hard
Experimentation & A/B Testing · Company-context scenario
Measure surge pricing's effect on driver retention
ProUber is considering a surge-pricing policy that changes marketplace conditions for every driver and rider in a zone.
Written case · Design · 25 min · Hard
Experimentation & A/B Testing · Reported at Uber
Test a new shoppable-ad ranking model
Meta has a new ranking model for shoppable-feed ads.
Written case · Design · 20 min · Medium
Experimentation & A/B Testing · Reported at Meta
False-positive risk across four variants
You compare four independent treatment variants with one control.
Calculation · Design · 10 min · Medium
Experimentation & A/B Testing · Reported interview question