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31+ Zeta questions

Zeta interview questions and how to prepare

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

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ZorixOS tracks 31 community-reported Zeta 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 Zeta's known interview style (not claimed as asked at Zeta), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Zeta.

Updated July 2026

Zeta interview questions candidates report

Community-reported from real Zeta interviews (open-source dataset), most-asked first. Showing 31. Each links to its source.

  1. Apply Operations to Make Two Strings Equal
    StringDynamic Programming
    Medium100% asked
  2. Count Equal and Divisible Pairs in an Array
    Array
    Easy100% asked
  3. Split Array Largest Sum
    ArrayBinary SearchDynamic ProgrammingGreedy
    Hard100% asked
  4. Minimum Window Substring
    Hash TableStringSliding Window
    Hard93% asked
  5. Capacity To Ship Packages Within D Days
    ArrayBinary Search
    Medium85% asked
  6. Palindrome Partitioning II
    StringDynamic Programming
    Hard85% asked
  7. Remove Boxes
    ArrayDynamic ProgrammingMemoization
    Hard85% asked
  8. Task Scheduler
    ArrayHash TableGreedySorting
    Medium85% asked
  9. Trapping Rain Water
    ArrayTwo PointersDynamic ProgrammingStack
    Hard85% asked
  10. Binary Tree Cameras
    Dynamic ProgrammingTreeDepth-First SearchBinary Tree
    Hard73% asked
  11. Count Univalue Subtrees
    TreeDepth-First SearchBinary Tree
    Medium73% asked
  12. Distribute Coins in Binary Tree
    TreeDepth-First SearchBinary Tree
    Medium73% asked
  13. Find All Possible Recipes from Given Supplies
    ArrayHash TableStringGraph Theory
    Medium73% asked
  14. Guess Number Higher or Lower II
    MathDynamic ProgrammingGame Theory
    Medium73% asked
  15. Heaters
    ArrayTwo PointersBinary SearchSorting
    Medium73% asked
  16. House Robber
    ArrayDynamic Programming
    Medium73% asked
  17. Insert Delete GetRandom O(1)
    ArrayHash TableMathDesign
    Medium73% asked
  18. Longest Substring Without Repeating Characters
    Hash TableStringSliding Window
    Medium73% asked
  19. Maximal Rectangle
    ArrayDynamic ProgrammingStackMatrix
    Hard73% asked
  20. Maximum Subarray
    ArrayDivide and ConquerDynamic Programming
    Medium73% asked
  21. Median of Two Sorted Arrays
    ArrayBinary SearchDivide and Conquer
    Hard73% asked
  22. Merge Intervals
    ArraySorting
    Medium73% asked
  23. Minimize the Maximum Difference of Pairs
    ArrayBinary SearchDynamic ProgrammingGreedy
    Medium73% asked
  24. Next Greater Element II
    ArrayStackMonotonic Stack
    Medium73% asked
  25. Partition to K Equal Sum Subsets
    ArrayDynamic ProgrammingBacktrackingBit Manipulation
    Medium73% asked
  26. Power Grid Maintenance
    ArrayHash TableDepth-First SearchBreadth-First Search
    Medium73% asked
  27. Remove K Digits
    StringStackGreedyMonotonic Stack
    Medium73% asked
  28. Reverse Nodes in k-Group
    Linked ListRecursion
    Hard73% asked
  29. Shifting Letters II
    ArrayStringPrefix Sum
    Medium73% asked
  30. Sliding Window Maximum
    ArrayQueueSliding WindowHeap (Priority Queue)
    Hard73% asked
  31. Word Break
    ArrayHash TableStringDynamic Programming
    Medium73% asked

Practice questions in Zeta's style

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

  1. Zeta's core offering involves co-branded credit cards and banking solutions. Imagine you're building a real-time fraud detection system for these cards. Describe the architectural considerations for a system that needs to handle millions of transactions per day with sub-second latency. What technologies would you consider and why?

    Software EngineerSystem DesignTests: Evaluating the candidate's ability to design scalable, low-latency systems under specific business constraints.

  2. Zeta processes sensitive financial data. How would you approach securing the API endpoints that expose user transaction history, considering potential attack vectors like SQL injection and cross-site scripting?

    Software EngineerSecurity & API DesignTests: Assessing understanding of common web security vulnerabilities and mitigation strategies in a financial context.

  3. A customer reports that their credit card transaction is incorrectly flagged as fraudulent, leading to a blocked transaction and a negative user experience. Walk through how you would debug this issue, assuming the transaction goes through a microservice architecture. What logs would you check, and what potential root causes would you investigate?

    Software EngineerDebuggingTests: Probing problem-solving skills and systematic debugging approaches in a distributed system.

  4. Zeta aims to simplify financial management for its users. Design a data model for storing and retrieving customer transaction data, including categorization and spending patterns. Consider how this model would support features like budgeting and insights.

    Software EngineerData ModelingTests: Evaluating the candidate's ability to create efficient and relevant data structures for financial applications.

  5. Given Zeta's focus on co-branded cards, imagine a scenario where a partner bank experiences an outage. How would your system design ensure data consistency and minimal disruption to Zeta's users during such an event?

    Software EngineerSystem Design (Resilience)Tests: Testing resilience and fault tolerance design principles in a microservices environment.

  6. Zeta offers features like automatic bill payments. How would you design the scheduler and retry mechanism for these payments to ensure reliability and handle potential failures gracefully, considering network issues and downstream service unavailability?

    Software EngineerConcurrency & ReliabilityTests: Assessing understanding of asynchronous processing, idempotency, and error handling in critical financial workflows.

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

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Zeta Interview Questions (2026) | ZorixOS