HCLTech prep

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

#31

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

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

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

#32

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

#33

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

#34

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

#35

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) System design

#36

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) System design

#37

Design a distributed rate limiter for an API gateway — HCLTech interview

Reported in HCLTech interview loops. System design testing token bucket, sliding window, and Redis coordination.

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HCLTech Mid-level (3–5 years) Behavioral

#38

Tell me about a time you disagreed with a teammate. How did you handle it? — HCLTech interview

Reported in HCLTech interview loops. Behavioral STAR question assessing collaboration and conflict resolution.

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

#39

What principles do you follow when designing RESTful APIs? — HCLTech interview

Reported in HCLTech interview loops. API design question covering resources, HTTP semantics, and versioning.

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