ZorixOS
6+ Compass questions

Compass interview questions and how to prepare

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

Practice Compass questions free All companies

ZorixOS tracks 6 community-reported Compass 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 Compass's known interview style (not claimed as asked at Compass), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Compass.

Updated July 2026

Compass interview questions candidates report

Community-reported from real Compass interviews (open-source dataset), most-asked first. Showing 6. Each links to its source.

  1. Decode String
    StringStackRecursion
    Medium100% asked
  2. Total Distance Traveled
    MathSimulation
    Easy100% asked
  3. Camelcase Matching
    ArrayTwo PointersStringTrie
    Medium90% asked
  4. Group Anagrams
    ArrayHash TableStringSorting
    Medium90% asked
  5. Subtree of Another Tree
    TreeDepth-First SearchString MatchingBinary Tree
    Easy90% asked
  6. Time Based Key-Value Store
    Hash TableStringBinary SearchDesign
    Medium89% asked

Practice questions in Compass's style

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

  1. Imagine Compass is experiencing a surge in user registrations due to a new marketing campaign. Design a system to handle the increased load on our user authentication service, ensuring both scalability and security. Consider potential bottlenecks and how you would mitigate them.

    Software EngineerSystem DesignTests: Evaluates the candidate's ability to design scalable and resilient distributed systems under pressure, considering trade-offs.

  2. We are seeing a significant number of users drop off during the property search filtering process on Compass. How would you debug this issue? Walk me through your thought process, starting from identifying the potential causes to proposing solutions.

    Software EngineerDebuggingTests: Assesses the candidate's systematic approach to problem-solving and debugging complex web applications.

  3. Compass uses a microservices architecture. Describe a scenario where a service failure in our 'Listing Ingestion' service could impact the 'Property Search' experience for users. How would you implement fault tolerance mechanisms to prevent cascading failures?

    Software EngineerSystem Design/ResiliencyTests: Tests understanding of microservice architecture, fault tolerance, and interservice communication challenges.

  4. Write a SQL query to find the top 5 most viewed properties in San Francisco during the last 30 days, considering that 'views' are recorded in a 'property_views' table with 'property_id', 'user_id', and 'timestamp' columns, and property details are in a 'properties' table with 'property_id' and 'city' columns.

    Software EngineerSQL/Data RetrievalTests: Evaluates proficiency in writing efficient SQL queries for data retrieval and aggregation.

  5. Our mobile app team is considering introducing a new feature to allow users to save property searches. What are the key technical considerations for implementing this feature, from a backend perspective, ensuring data consistency and performance?

    Software EngineerBackend DevelopmentTests: Probes the candidate's understanding of backend development principles and challenges in feature implementation.

  6. Compass aims to provide real-time updates for property listings. How would you design a system for real-time notifications to users about price changes or new listings matching their saved searches? Discuss the technologies and architectural patterns you might use.

    Software EngineerReal-time SystemsTests: Assesses knowledge of real-time communication technologies and system design for event-driven architectures.

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

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Compass Interview Questions (2026) | ZorixOS