Top 50
Prep plan
Updated weekly · Last refresh Aug 30

Pubmatic Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 19 questions · ~166 min
Middle of Linked ListEasy
Practice

Find the middle node of a singly linked list in one pass using slow and fast pointers.

Basic AlgorithmsLinked ListsTwo PointersPubmatic
Design an LRU CacheEasy
Practice

Implement an LRU cache in O(1) average time using a hash table and doubly linked list.

Hash TablesQueueLinked ListsPubmatic
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2
SQL & Data Manipulation10 questions + 3 drills · ~118 min
3
Execution3 questions · ~26 min
Fault-Tolerant Distributed ClusteringHard

Tests system design skills for building resilient distributed clustering under failures.

distributed systemsRisk Assessmentfault tolerancePubmatic
Scale Backend to MillionsHard

Tests scalability planning across architecture, performance, and operational concerns.

Trade-offsExecutionResource AllocationPubmatic
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4
Pipelines3 questions · ~26 min
ETL for Ad Impression DataHard

Tests data engineering skills for building robust pipelines handling large ad event streams.

Data QualityETLOrchestrationPubmatic
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5
System Design5 questions · ~44 min
Fault-Tolerant Low-Latency Ad ServingHard

Tests system design for ultra-low latency, reliability, and throughput in ad-tech workflows.

Feature StoreModel ServingRecommendation SystemsPubmatic
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6
Security & Infrastructure5 questions · ~44 min
OOP FeaturesEasy

Assesses OOP fundamentals and practical application.

programming conceptsoopPubmatic
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7
More topics5 questions · ~44 min
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.