Real Interview Questions

What is bit manipulation, and what problem does it solve?

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Algorithms Data Structures

🟢 Easy Conceptual Fresher 👤 Software 🏢 Virtusa Asked 1× May 2026

What are the main trade-offs of using bit manipulation?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Datamatics Asked 1× May 2026

What is prefix sums, and what problem does it solve?

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Algorithms Data Structures

🟢 Easy Debugging Fresher 👤 Software 🏢 Virtusa Asked 1× May 2026

What are the main trade-offs of using Bloom filter?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Persistent Systems Asked 1× May 2026

When would you choose suffix array in a real project?

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Algorithms Data Structures

🟡 Medium Debugging Mid 👤 Software 🏢 CGI Asked 1× May 2026

How does strongly connected components affect reliability or scalability?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Cigniti Technologies Asked 1× May 2026

What are common mistakes engineers make when using priority queue?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Calsoft Asked 1× May 2026

What are the main trade-offs of using union-find?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Datamatics Asked 1× May 2026

How would you test a component that depends on greedy algorithms?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Mphasis Asked 1× May 2026

How would you compare greedy algorithms and divide and conquer for a production system?

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Algorithms Data Structures

🔴 Hard Conceptual Senior 👤 Software 🏢 KPMG Asked 1× May 2026

How does divide and conquer work at a high level?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 Capgemini Asked 1× May 2026

How would you compare bucket sort and stable sorting for a production system?

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Algorithms Data Structures

🔴 Hard Conceptual Senior 👤 Software 🏢 Wipro Asked 1× May 2026

How does stable sorting affect reliability or scalability?

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Algorithms Data Structures

🟡 Medium Conceptual Mid 👤 Software 🏢 NTT DATA Asked 1× May 2026

We have a Delta table `retail_prod.analytics.sales_silver` that is about 600 GB. It is partitioned by `event_date` (daily) and contains many small files (5–20 MB) with no Z‑Order. Dashboards filter on the last 30 days of `event_date` and `merchant_id`, and the p95 query time is above 12 seconds. We cannot change the upstream schema. How can we bring the p95 query time under 12 seconds for the 30‑day window?

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Delta Lake Data Skipping Databricks

🟡 Medium Conceptual Mid 👤 Aws Data Engineer 🏢 Firstsource Solutions Asked 1× May 2026

How would you test a component that depends on browser caching?

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Frontend

🟡 Medium Conceptual Mid 👤 Frontend 🏢 NTT DATA Asked 1× May 2026

How does sessions affect reliability or scalability?

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Frontend

🟡 Medium Conceptual Mid 👤 Frontend 🏢 Wipro Asked 1× May 2026

How does localStorage affect reliability or scalability?

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Frontend

🟡 Medium Conceptual Mid 👤 Frontend 🏢 Accenture Asked 1× May 2026

What are common mistakes engineers make when using React state management?

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Frontend

🟡 Medium Conceptual Mid 👤 Frontend 🏢 ITC Infotech Asked 1× May 2026

What is React Suspense, and what problem does it solve?

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Frontend

🟢 Easy Conceptual Fresher 👤 Frontend 🏢 TCS Asked 1× May 2026

What are common mistakes engineers make when using Vite?

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Frontend

🟡 Medium Conceptual Mid 👤 Frontend 🏢 KPMG Asked 1× May 2026