ZorixOS
19+ Quora questions

Quora interview questions and how to prepare

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

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ZorixOS tracks 19 community-reported Quora 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 77 original ZorixOS practice questions written in Quora's known interview style (not claimed as asked at Quora), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Quora.

Updated July 2026

Quora interview questions candidates report

Community-reported from real Quora interviews (open-source dataset), most-asked first. Showing 19. Each links to its source.

  1. Construct Target Array With Multiple Sums
    ArrayHeap (Priority Queue)
    Hard100% asked
  2. Insert Delete GetRandom O(1)
    ArrayHash TableMathDesign
    Medium100% asked
  3. Subarray Sum Equals K
    ArrayHash TablePrefix Sum
    Medium100% asked
  4. Text Justification
    ArrayStringSimulation
    Hard100% asked
  5. Range Frequency Queries
    ArrayHash TableBinary SearchDesign
    Medium98% asked
  6. 1-bit and 2-bit Characters
    Array
    Easy96% asked
  7. 3Sum With Multiplicity
    ArrayHash TableTwo PointersSorting
    Medium96% asked
  8. Encode Number
    MathStringBit Manipulation
    Medium96% asked
  9. Exam Room
    DesignHeap (Priority Queue)Ordered Set
    Medium96% asked
  10. Find Numbers with Even Number of Digits
    ArrayMath
    Easy96% asked
  11. Find the K-Beauty of a Number
    MathStringSliding Window
    Easy96% asked
  12. Finding Pairs With a Certain Sum
    ArrayHash TableDesign
    Medium96% asked
  13. Get Biggest Three Rhombus Sums in a Grid
    ArrayMathSortingHeap (Priority Queue)
    Medium96% asked
  14. Maximum Number of Words You Can Type
    Hash TableString
    Easy96% asked
  15. Sort the Matrix Diagonally
    ArraySortingMatrix
    Medium96% asked
  16. Substrings of Size Three with Distinct Characters
    Hash TableStringSliding WindowCounting
    Easy96% asked
  17. Subtract the Product and Sum of Digits of an Integer
    Math
    Easy96% asked
  18. Longest Common Prefix
    ArrayStringTrie
    Easy92% asked
  19. Serialize and Deserialize Binary Tree
    StringTreeDepth-First SearchBreadth-First Search
    Hard81% asked

Practice questions in Quora's style

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

  1. Imagine Quora is experiencing a surge in AI generated content. As a Software Engineer, how would you design a system to detect and flag potentially AI generated answers at scale, considering the trade-offs between precision and recall? What are the key components of such a system and how would you ensure its efficiency?

    Software EngineerSystem DesignTests: Evaluates system design thinking, scalability considerations, and trade-off analysis for a complex, real-world problem.

  2. A user reports that their feed is showing a lot of content they've previously downvoted. As a Software Engineer, how would you debug this issue? Walk me through your thought process, potential root causes, and how you would verify your fix.

    Software EngineerDebuggingTests: Assesses debugging methodology, logical reasoning, and understanding of recommendation system components.

  3. Quora is building a new feature to allow users to create collaborative 'Spaces' for specific topics, similar to Reddit subreddits but with more structured moderation. As a Software Engineer, design the data model for managing these Spaces, their members, posts, and moderation roles. Consider potential query patterns and performance implications.

    Software EngineerData ModelingTests: Tests understanding of database design principles, schema optimization, and ability to model complex relationships.

  4. You've identified a potential bug where users in certain regions are experiencing significantly slower load times for Quora pages. Describe how you would approach diagnosing this performance bottleneck as a Software Engineer, including the tools and metrics you would use.

    Software EngineerPerformance DebuggingTests: Evaluates practical debugging skills, understanding of performance metrics, and familiarity with relevant tooling.

  5. Quora is considering a change to its recommendation algorithm to prioritize content that sparks more 'thoughtful' discussions over simple engagement. As a Software Engineer, what are the technical challenges in implementing and A/B testing such a nuanced change? How would you measure 'thoughtfulness' programmatically?

    Software EngineerAlgorithm Design & ExperimentationTests: Tests ability to translate qualitative concepts into quantifiable metrics and design for experimental validation.

  6. Quora is seeing increased usage of its 'Spaces' feature. As a Software Engineer working on the backend, how would you design a system for real-time notifications to users about new posts or comments within their followed Spaces, considering scalability and potential latency issues?

    Software EngineerReal-time SystemsTests: Assesses knowledge of distributed systems, real-time communication patterns, and scalability challenges.

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

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Quora Interview Questions (2026) | ZorixOS