Interview Cache

Master your next technical interview with real questions from industry leaders.

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21 problems across 5 categories

Title	Difficulty	Updated
Solve classic backend coding problems Backend EngineerCoding	Medium	Feb 26, 2026
Design browser history across tabs Backend EngineerCoding	Medium	Feb 26, 2026
Explain sync/async, Go concurrency, SQL vs NoSQL Software EngineerCoding	Easy	Nov 13, 2025
Design load balancing, caching, and idempotent APIs Software EngineerSystem Design	Easy	Nov 13, 2025
Compute early signals for user retention Data Scientist	Easy	Nov 6, 2025
Write SQL for noisy A/B launch metrics Data Scientist	Medium	Oct 13, 2025
Design an A/B launch amid marketing confounds Data ScientistProduct Sense	Medium	Oct 13, 2025
Decide launch with CPA-profit trade-offs by segment Data ScientistProduct Sense	Medium	Oct 13, 2025
Write rolling-window SQL over weekly cohorts Data Scientist	Medium	Oct 13, 2025
Implement single-tab browser history navigation Software EngineerCoding	Medium	Sep 6, 2025
Design multi-tab browser history and trade-offs Software EngineerSystem Design	Medium	Sep 6, 2025
Compute minimum time with task cooldowns Software EngineerCoding	Medium	Aug 7, 2025
Propose Innovative Ideas and Convince Others Effectively Data ScientistBehavioral	Medium	Aug 4, 2025
Navigate Complex Product Challenges in Behavioral Interviews Data ScientistBehavioral	Medium	Aug 4, 2025
Determine Key Metrics for Spend-Tracker Launch Decision Data ScientistProduct Sense	Medium	Aug 4, 2025
Design and Analyze A/B Test for Recommendation Widget Data ScientistProduct Sense	Hard	Aug 4, 2025
Design an Effective A/B Test for Algorithm Launch Data ScientistProduct Sense	Medium	Aug 4, 2025
Analyze Acquisition Channels for User Value and Retention Data Scientist	Medium	Aug 4, 2025
Simulate toppling board game outcome Software EngineerCoding	Medium	Jul 27, 2025
Find missing number from concatenated digits Software EngineerCoding	Medium	Jul 27, 2025
Design mobile check deposit system Software EngineerSystem Design	Hard	Jul 27, 2025