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7+ Rakuten questions

Rakuten interview questions and how to prepare

The questions candidates report from Rakuten interviews, sorted by how often they come up, with difficulty and topics, plus original practice written in Rakuten's interview style.

Practice Rakuten questions free All companies

ZorixOS tracks 7 community-reported Rakuten interview questions, drawn from an open-source dataset of real interview reports and sorted by how frequently each one comes up. Every question links to its source. Alongside them are 78 original ZorixOS practice questions written in Rakuten's known interview style (not claimed as asked at Rakuten), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Rakuten.

Updated July 2026

Rakuten interview questions candidates report

Community-reported from real Rakuten interviews (open-source dataset), most-asked first. Showing 7. Each links to its source.

  1. Combination Sum II
    ArrayBacktracking
    Medium100% asked
  2. Climbing Stairs
    MathDynamic ProgrammingMemoization
    Easy89% asked
  3. LRU Cache
    Hash TableLinked ListDesignDoubly-Linked List
    Medium89% asked
  4. Rotate Image
    ArrayMathMatrix
    Medium89% asked
  5. Rotting Oranges
    ArrayBreadth-First SearchMatrix
    Medium89% asked
  6. String Compression
    Two PointersString
    Medium89% asked
  7. Trapping Rain Water
    ArrayTwo PointersDynamic ProgrammingStack
    Hard88% asked

Practice questions in Rakuten's style

Original ZorixOS questions written the way Rakuten interviews, so you rehearse the real format. Not claimed as asked at Rakuten.

  1. Imagine Rakuten Ichiba is experiencing a surge in user traffic during a major sale event. Design a system to handle this peak load, considering caching strategies, database scaling, and load balancing for the product listing and checkout services. What potential bottlenecks do you foresee and how would you address them?

    Software EngineerSystem DesignTests: Evaluates system design thinking, scalability, and performance optimization under high load.

  2. You've identified a bug in Rakuten Travel's booking engine causing a small percentage of bookings to fail silently. Describe your process for debugging this issue, from initial detection to deployment of a fix. What tools and techniques would you use to isolate the root cause?

    Software EngineerDebuggingTests: Assesses debugging methodology, problem-solving skills, and familiarity with debugging tools.

  3. Consider the Rakuten Kobo e-reader platform. If we wanted to implement a recommendation system for books, what data would you collect and how would you approach building a collaborative filtering model? Discuss potential challenges like the cold-start problem and data sparsity.

    Software EngineerAlgorithms and Data StructuresTests: Tests understanding of recommendation algorithms, data handling, and tackling common machine learning challenges.

  4. Write a function in your preferred language to find the top K most frequently viewed products on Rakuten Ichiba in a given time range. Assume you have access to a stream of view events, each containing a product ID and timestamp. Discuss the time and space complexity of your solution.

    Software EngineerCodingTests: Evaluates coding proficiency, algorithm design, and efficiency analysis.

  5. Rakuten's 'Rakuten Points' system is central to its ecosystem. How would you design a system to efficiently process real-time point accrual and redemption across multiple Rakuten services, ensuring consistency and handling potential race conditions?

    Software EngineerSystem DesignTests: Probes system design for distributed systems, concurrency, and data consistency.

  6. Given a table of user clickstream data on Rakuten Ichiba (columns: user_id, product_id, timestamp, event_type), write a SQL query to identify users who have viewed at least 3 distinct products and then added at least one of those to their cart.

    Data ScientistSQLTests: Measures SQL proficiency and ability to extract insights from behavioral data.

72+ more Rakuten-style questions are in the free library, each practiceable live with adaptive follow-ups and an honest scorecard. Start free.

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Rakuten Interview Questions (2026) | ZorixOS