upstart
45 interview questions available
Estimate impact without experiments and pick variant
easy
Feb 19, 2026
Correct length-biased sampling from family-size survey
easy
Feb 19, 2026
Implement four string-processing functions
medium
Jan 5, 2026
Compute decay, OLS, and classic probability results
easy
Dec 9, 2025
Explain L1 vs L2 and ridge vs lasso
easy
Dec 9, 2025
Implement factorial and count trailing zeros
easy
Dec 9, 2025
Combine noisy thermometers; compute random-walk correlations
easy
Oct 25, 2025
Explain career moves and defend moat
hard
Oct 13, 2025
Evaluate channels and allocate budget
hard
Oct 13, 2025
Decide to ship a signup experiment
hard
Oct 13, 2025