sofi
18 interview questions available
Format words into wrapped/justified lines
medium
Feb 12, 2026
Generate all permutations of an array
medium
Jan 16, 2026
Find maximum-occurring character in a string
easy
Jan 7, 2026
Rearrange array to maximize positive prefix sums
easy
Jan 7, 2026
Count numbers with same popcount up to all-ones bound
easy
Jan 7, 2026
Align with PM on ranking goals
medium
Oct 13, 2025
Plan and validate ranking experiment
hard
Oct 13, 2025
Design a fintech product ranking system
hard
Oct 13, 2025
Design a fintech homepage ranker
hard
Oct 13, 2025
Simulate 1-D collisions and scale to huge inputs
Medium
Sep 6, 2025