HCLTech Interview Questions (With Answers)

741 Questions asked

Apr 2026 First seen

Sep 2026 Last seen

741 Unique questions

🥧 Difficulty mix

How hard are these questions?

Easy 96 (13%)Medium 542 (73%)Hard 103 (14%)

📊 Question type

Breakdown by interview phase

🔥 12-week activity

When candidates are asked these

Last 12 weeks →

🏷️ Top topics

Where these questions cluster

Devops 81

Cloud Devops 59

Ai Machine Learning 55

Data Engineering 43

Python 42

Java 41

Algorithms Data Structures 40

Javascript Typescript 40

👤 Experience level mix

What seniority these are asked at

Fresher (0-1yr) 95Junior (1-3yr) 4Mid (3-6yr) 539Senior (6+yr) 103

📝 Recent questions

Latest 10 asked by candidates

🟡 Medium ✅

Write a SQL query to retrieve the top 3 customers by total purchase amount in the last 6 months.

Sql Aggregation Date Filtering

Conceptual · Asked 1× · Sep 2026

🟡 Medium ✅

How do you order logs? For example, a log entry, in this context, what does 'right‑after logs' mean? How would you ensure correct ordering of log events?

Logs Log Ordering Distributed Systems

Conceptual · Asked 1× · Sep 2026

🟡 Medium ✅

How do you provide a user access to other AWS services?

Iam Aws Security

Conceptual · Asked 1× · Aug 2026

🟡 Medium ✅

Imagine you need to process a large daily dataset on E‑D. You are using PySpark on EMR, but the input volume suddenly doubles and the job starts missing its SLE because of skew and shuffle. How would you redesign the job and the EMR setup to keep it both fast and cost‑efficient?

Spark Emr Data Engineering

Conceptual · Asked 1× · Jul 2026

🟡 Medium ✅

What is the difference between a star schema and a snowflake schema? Do you use them?

Star Schema Snowflake Schema Data Warehousing

Conceptual · Asked 1× · Jul 2026

🟡 Medium ✅

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🥧 Difficulty mix

📊 Question type

🔥 12-week activity

🏷️ Top topics

👤 Experience level mix

📝 Recent questions

Write a SQL query to retrieve the top 3 customers by total purchase amount in the last 6 months.

How do you order logs? For example, a log entry, in this context, what does 'right‑after logs' mean? How would you ensure correct ordering of log events?

How do you provide a user access to other AWS services?

Imagine you need to process a large daily dataset on E‑D. You are using PySpark on EMR, but the input volume suddenly doubles and the job starts missing its SLE because of skew and shuffle. How would you redesign the job and the EMR setup to keep it both fast and cost‑efficient?

What is the difference between a star schema and a snowflake schema? Do you use them?

When would you choose Big Omega notation in a real project?

What are the main trade-offs of using monotonic stack?

How is OWASP typically used in a real system?

What security considerations apply to scheduler?

How would you monitor and alert on failures involving recovery?

🎤 Want these answered in real-time during your interview?