Collegedunia Web Private Backend Engineer Interview Questions

The questions to prepare for a Collegedunia Web Private Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

4questions

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SQL & Data ManipulationStart here. 1 question + 2 drills · ~31 min

Filter Collegedunia employees by salary range and S-prefixed names using JOIN, WHERE, and ORDER BY.

Aggregate completed PlayStation Store purchases and return accounts with at least two qualifying purchases.

Audit PostgreSQL metadata for missing or invalid keys and tables with inefficient sequential-scan patterns.

Technical Fundamentals2 questions · ~22 min

Evaluates conceptual understanding and practical applicability of stacks.

Interface vs Abstract ClassEasy

Assesses understanding of object-oriented design concepts and their practical use.

object-oriented programmingCCollegedunia Web Private

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System Design1 question · ~11 min

Design a Scalable Notification SystemHard

Evaluates system design skills for a high-volume multi-channel notification system.

notification systemscalabilityarchitectureCCollegedunia Web Private

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