Interview Cache
Master your next technical interview with real questions from industry leaders.
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61 problems across 4 categories
| Done | Title | Difficulty | Updated |
|---|---|---|---|
| Implement logger and card ranking Software EngineerCoding | Medium | Apr 19, 2026 | |
| Design a personalized news aggregator Software EngineerSystem Design | Medium | Apr 19, 2026 | |
| Design a Driver Payroll System Software EngineerCoding | Medium | Mar 21, 2026 | |
| Compare Complete or Partial Hands Software EngineerCoding | Medium | Mar 14, 2026 | |
| Implement Food Delivery Billing Software EngineerCoding | Medium | Mar 12, 2026 | |
| Design a Scalable News Feed Software EngineerSystem Design | Medium | Mar 12, 2026 | |
| Implement a balance tracker and interval merger Software EngineerCoding | Medium | Mar 10, 2026 | |
| Compute total wages and partial-hour payments Software EngineerCoding | Medium | Mar 1, 2026 | |
| Design Scalable Expense Violation Processing Software EngineerSystem Design | Hard | Feb 27, 2026 | |
| Build a Flexible Expense Rules Engine Software EngineerCoding | Hard | Feb 27, 2026 | |
| Scale a rules engine for high traffic Software EngineerSystem Design | Medium | Feb 12, 2026 | |
| Design an extensible expense rule evaluator Software EngineerCoding | Medium | Feb 12, 2026 | |
| Design a news aggregator like Google News Software EngineerSystem Design | Medium | Feb 12, 2026 | |
| Compute org height and minimal CEO promotions Software EngineerCoding | Hard | Feb 12, 2026 | |
| Find bounding boxes of connected houses Software EngineerCoding | Medium | Feb 11, 2026 | |
| Design a user behavior tracking system Software EngineerSystem Design | Hard | Feb 11, 2026 | |
| Design centralized log ingestion and query system Software EngineerSystem Design | Medium | Jan 22, 2026 | |
| Design a hotel search and booking system Software EngineerSystem Design | Hard | Dec 8, 2025 | |
| Design a news aggregation and feed service Software EngineerSystem Design | Hard | Dec 8, 2025 | |
| Find minimum of unknown convex function Software Engineer | Medium | Dec 8, 2025 | |
| Convert amounts between multiple currencies Software EngineerCoding | Medium | Dec 8, 2025 | |
| Compute median of two sorted arrays Software EngineerCoding | Medium | Dec 8, 2025 | |
| Design in-memory delivery billing core APIs Software EngineerSystem Design | Medium | Dec 8, 2025 | |
| Implement an article voting tracker Software EngineerCoding | Easy | Dec 5, 2025 | |
| Design a news aggregator system Software EngineerSystem Design | Easy | Dec 5, 2025 | |
| Design a user behavior monitoring system Software EngineerSystem Design | Medium | Dec 4, 2025 | |
| Design article voting and flip-tracking system Software EngineerCoding | Medium | Dec 1, 2025 | |
| Find median of two sorted arrays Software EngineerCoding | Medium | Nov 20, 2025 | |
| Explain JS event loop and related concepts Software EngineerCoding | Medium | Nov 20, 2025 | |
| Design poker-like hand comparison with custom ranking Software EngineerCoding | Hard | Oct 22, 2025 | |
| What was the hardest part of your project? Software EngineerBehavioral | Medium | Oct 17, 2025 | |
| Track article votes and last three flips Software EngineerCoding | Medium | Oct 17, 2025 | |
| Design an ad-click aggregation and enrichment pipeline Software EngineerSystem Design | Medium | Oct 17, 2025 | |
| Design a large-scale news app with caching Software EngineerSystem Design | Medium | Oct 17, 2025 | |
| Aggregate expenses by person, trip, and category Software EngineerCoding | Medium | Oct 17, 2025 | |
| Design personalized news aggregation service Software EngineerSystem Design | Medium | Oct 4, 2025 | |
| Walk through a project deep dive Software EngineerBehavioral | Medium | Sep 6, 2025 | |
| Implement a minimal local HTTP server Software EngineerSystem Design | Hard | Sep 6, 2025 | |
| Design a scalable expense rules engine Software EngineerSystem Design | Hard | Sep 6, 2025 | |
| Design a real-time delivery dashboard Software EngineerSystem Design | Hard | Sep 6, 2025 | |
| Design a music player with favorites cap Software EngineerCoding | Medium | Sep 6, 2025 | |
| Design a Google News-like aggregator Software EngineerSystem Design | Hard | Sep 6, 2025 | |
| Design a flexible expense reimbursement system Software EngineerSystem Design | Hard | Sep 6, 2025 | |
| Design a driver payroll service Software EngineerSystem Design | Medium | Sep 6, 2025 | |
| Compute unique-dasher concurrency with tie-breaking Software EngineerCoding | Medium | Sep 6, 2025 | |
| Compute peak concurrent drivers in 24 hours Software EngineerCoding | Medium | Sep 6, 2025 | |
| Compute maximum simultaneous drivers Software EngineerCoding | Medium | Sep 6, 2025 | |
| Implement stack and interval algorithms with tests Machine Learning EngineerCoding | Medium | Aug 12, 2025 | |
| Compute peak busy dashers with overlaps Software EngineerCoding | Medium | Aug 10, 2025 | |
| Extend rules for trip-level aggregates and outputs Software EngineerSystem Design | Medium | Aug 7, 2025 | |
| Design expense rules engine and return type Software EngineerSystem Design | Medium | Aug 7, 2025 | |
| Design a delivery cost aggregator Software EngineerSystem Design | Medium | Aug 7, 2025 | |
| Design delivery driver payment tracker Software EngineerSystem Design | Medium | Aug 4, 2025 | |
| Design delivery cost calculation system Software EngineerSystem Design | Medium | Aug 4, 2025 | |
| Introduce background and choose target team Software EngineerBehavioral | Medium | Aug 1, 2025 | |
| Design a delivery cost dashboard with payments Software EngineerSystem Design | Medium | Aug 1, 2025 | |
| Design a delivery cost system Software EngineerSystem Design | Medium | Jul 31, 2025 | |
| Compute max simultaneous drivers last 24 hours Software EngineerCoding | Medium | Jul 31, 2025 | |
| Design delivery driver payment system Software EngineerSystem Design | Medium | Jul 29, 2025 | |
| Compute concurrent online drivers Software EngineerCoding | Medium | Jul 29, 2025 | |
| Design a news feed aggregator Software EngineerSystem Design | Hard | Jul 26, 2025 |