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16+ HCLTech questions

HCLTech interview questions and how to prepare

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

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ZorixOS tracks 16 community-reported HCLTech 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 HCLTech's known interview style (not claimed as asked at HCLTech), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to HCLTech.

Updated July 2026

HCLTech interview questions candidates report

Community-reported from real HCLTech interviews (open-source dataset), most-asked first. Showing 16. Each links to its source.

  1. Two Sum
    ArrayHash Table
    Easy100% asked
  2. Valid Palindrome
    Two PointersString
    Easy100% asked
  3. Valid Parentheses
    StringStack
    Easy89% asked
  4. Longest Substring Without Repeating Characters
    Hash TableStringSliding Window
    Medium83% asked
  5. Merge Sorted Array
    ArrayTwo PointersSorting
    Easy78% asked
  6. Best Time to Buy and Sell Stock
    ArrayDynamic Programming
    Easy76% asked
  7. 3Sum
    ArrayTwo PointersSorting
    Medium66% asked
  8. Department Top Three Salaries
    Database
    Hard66% asked
  9. Missing Number
    ArrayHash TableMathBinary Search
    Easy66% asked
  10. Reverse String
    Two PointersString
    Easy66% asked
  11. Second Highest Salary
    Database
    Medium66% asked
  12. Longest Palindromic Substring
    Two PointersStringDynamic Programming
    Medium62% asked
  13. Maximum Subarray
    ArrayDivide and ConquerDynamic Programming
    Medium62% asked
  14. Minimum Size Subarray Sum
    ArrayBinary SearchSliding WindowPrefix Sum
    Medium62% asked
  15. Palindromic Substrings
    Two PointersStringDynamic Programming
    Medium62% asked
  16. Reverse Words in a String
    Two PointersString
    Medium62% asked

Practice questions in HCLTech's style

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

  1. Imagine HCLTech's 'HCLSoftware' division is developing a new cloud-native microservices platform for enterprise customers. Describe how you would design the authentication and authorization service to handle millions of concurrent users across different tenants, considering security and performance.

    Software EngineerSystem DesignTests: Evaluates the candidate's ability to design scalable and secure distributed systems.

  2. A customer reports intermittent latency issues with HCLTech's 'HCL Domino' collaboration platform when accessing shared files. What steps would you take to debug this problem, assuming the infrastructure is a mix of on-premises and cloud deployments?

    Software EngineerDebuggingTests: Assesses problem-solving and diagnostic skills in a complex environment.

  3. Write a SQL query to find the top 5 customers in the last quarter who have used HCLTech's 'HCL DRYiCE' automation platform the most, based on the number of completed automation tasks.

    Data ScientistSQLTests: Tests SQL proficiency and understanding of customer usage metrics.

  4. HCLTech's 'HCL Commerce' platform has seen a recent dip in conversion rates for a specific product category. How would you design an A/B test to identify potential causes and measure the impact of proposed solutions?

    Data ScientistExperimentsTests: Evaluates ability to design and interpret A/B tests for business impact.

  5. As a Product Manager for HCLTech's 'HCL Digital Experience' platform, outline a strategy to increase adoption among small and medium-sized businesses. What key features or pricing models would you consider?

    Product ManagerProduct StrategyTests: Probes strategic thinking and market understanding for a specific HCLTech product.

  6. Consider HCLTech's 'HCL Software' portfolio. If you were to prioritize feature development for the next release of one of the products, what framework would you use and how would you justify your choices to stakeholders?

    Product ManagerRoadmappingTests: Assesses prioritization skills and ability to communicate product decisions.

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

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HCLTech Interview Questions (2026) | ZorixOS