airtel Backend Engineer Interview Questions

The questions to prepare for a airtel Backend Engineer interview. Questions from real interview reports rank first. Updated weekly.

SOAP vs REST APIs

Medium

Assesses your understanding of API styles and when to use each in backend systems.

Communicationapi designtechnical knowledge

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Explain how BST search works by comparing the target at each node and analyze best, average, and worst-case time complexity.

LRU Cache Data Structure

Medium

Evaluates your ability to choose and justify the right data structures for caching.

cachingData Structureslru cache

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Maximum Subarray Sum

Medium

Tests your algorithmic skills for solving the maximum subarray sum problem.

Array ManipulationAlgorithms

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Detect Cycle in Linked List

Medium

Tests your ability to apply classic data-structure algorithms and reason about edge cases.

Linked Listscycle detectionAlgorithms

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Evaluates system design skills for building reliable, scalable notification delivery.

SQL vs NoSQL for Profiles

Hard

Assesses data modeling and storage trade-offs for user-profile workloads.

nosqlsqldatabase design

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Rate Limiting for High Traffic

Hard

Evaluates system design and scalability considerations for protecting APIs under load.

api designscalabilityrate limiting

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