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upstart

45 interview questions available

Estimate impact without experiments and pick variant

Correct length-biased sampling from family-size survey

Implement four string-processing functions

Compute decay, OLS, and classic probability results

Explain L1 vs L2 and ridge vs lasso

Implement factorial and count trailing zeros

Combine noisy thermometers; compute random-walk correlations

Explain career moves and defend moat

Evaluate channels and allocate budget

Decide to ship a signup experiment