Company interview vault

HCLTech Mid-level (3–5 years) System design

#4396

Design a URL shortening service — HCLTech interview

Reported in HCLTech interview loops. Foundational system design covering APIs, encoding, storage, and read-heavy scaling.

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HCLTech Mid-level (3–5 years) Coding / DSA

#4397

Explain and implement Dijkstra's algorithm for shortest paths — HCLTech interview

Reported in HCLTech interview loops. Graph algorithm for non-negative edge weights using priority queue.

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HCLTech Mid-level (3–5 years) Coding / DSA

#4398

Solve the 0/1 knapsack problem with dynamic programming — HCLTech interview

Reported in HCLTech interview loops. Classic DP testing tabulation, space optimization, and item selection reconstruction.

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HCLTech Mid-level (3–5 years) Coding / DSA

#4399

Design and implement an LRU cache with O(1) get and put — HCLTech interview

Reported in HCLTech interview loops. Hash map plus doubly linked list problem bridging DSA and system components.

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HCLTech Mid-level (3–5 years) Coding / DSA

#4400

How many distinct ways can you climb n stairs taking 1 or 2 steps at a time? — HCLTech interview

Reported in HCLTech interview loops. Introductory dynamic programming problem isomorphic to Fibonacci.

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Wipro Mid-level (3–5 years) Coding / DSA

#4401

How do you perform topological sort on a directed acyclic graph? — Wipro interview

Reported in Wipro interview loops. Graph algorithm for task scheduling, build systems, and course prerequisites.

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Wipro Mid-level (3–5 years) Technical deep dive

#4402

What is dependency injection and why is it useful? — Wipro interview

Reported in Wipro interview loops. Java/Spring staple connecting OOP design to testable service architecture.

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Wipro Mid-level (3–5 years) Technical deep dive

#4403

How do you version a public API without breaking clients? — Wipro interview

Reported in Wipro interview loops. API evolution question covering compatibility, deprecation, and communication.

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Wipro Mid-level (3–5 years) Behavioral

#4404

Tell me about a project that failed or missed its deadline. What did you learn? — Wipro interview

Reported in Wipro interview loops. Behavioral question testing accountability, retrospectives, and growth.

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Wipro Mid-level (3–5 years) Technical deep dive

#4405

Compare ACID and BASE consistency models in databases — Wipro interview

Reported in Wipro interview loops. Distributed data question bridging SQL transactions and NoSQL eventual consistency.

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Wipro Mid-level (3–5 years) Technical deep dive

#4406

How does Node.js handle concurrent requests with a single thread? — Wipro interview

Reported in Wipro interview loops. Node.js architecture question on libuv, event loop phases, and worker threads.

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Wipro Mid-level (3–5 years) Technical deep dive

#4407

When would you use useState versus useReducer in React? — Wipro interview

Reported in Wipro interview loops. React hooks question on local state complexity and predictable updates.

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Wipro Mid-level (3–5 years) Technical deep dive

#4408

What is the Python GIL and how does it affect concurrency? — Wipro interview

Reported in Wipro interview loops. Python-specific question on threading limits and multiprocessing alternatives.

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Wipro Mid-level (3–5 years) Technical deep dive

#4409

Explain the JavaScript event loop, call stack, and task queues — Wipro interview

Reported in Wipro interview loops. Core JavaScript concurrency model question for frontend and Node.js roles.

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Wipro Mid-level (3–5 years) Technical deep dive

#4410

How does HashMap work internally in Java? — Wipro interview

Reported in Wipro interview loops. Java-specific collections question on buckets, hashing, and resize behavior.

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