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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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5 questions
What a 95% interval actually says
Distinguish the frequentist claim from the common misreading.
Quick check · Intervals · 6 min · Medium
Statistics & Inference · Original Uplift question
Effect of halving the MDE
Reason about the sample size / MDE relationship.
Calculation · Intervals · 5 min · Easy
Statistics & Inference · Original Uplift question
Type I vs Type II error trade-off
A medical screening test is being tuned.
Quick check · Intervals · 5 min · Easy
Statistics & Inference · Company-context scenario
Is 550 heads in 1,000 flips suspicious?
A coin is flipped 1,000 times and lands heads 550 times.
Calculation · Intervals · 10 min · Medium
Statistics & Inference · Reported at D. E. Shaw
Control four confirmatory tests
A product experiment has four equally important confirmatory metrics.
Quick check · Intervals · 7 min · Easy
Statistics & Inference · Reported interview question