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Pubmatic Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 17 questions · ~148 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
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2
System Design5 questions · ~44 min
Design a System for a Non-Work ScenarioHard

Evaluates generalization, structured thinking, and ability to reason from fundamentals.

EstimationdesignrequirementsPubmatic
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3
Security & Infrastructure5 questions · ~44 min
OOP FeaturesEasy

Assesses OOP fundamentals and practical application.

programming conceptsoopPubmatic
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4
SQL & Data Manipulation9 questions + 3 drills · ~108 min
Shell Scripting and SQLMedium

Evaluates practical tooling skills for data workflows and automation.

shell scriptingsqlPubmatic
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
SQL Window Functions RankingEasy
Practice
Practice drill

Use PostgreSQL CTEs and ROW_NUMBER to return the top three products by monthly revenue within each category.

Window FunctionsRankingGroup ByEdgeverveCareer Soft Solutions Pvt.Keystone Strategy
Window Functions for Publisher RevenueMedium
Practice
Practice drill

Rank publishers by daily revenue and calculate each publisher's cumulative revenue across days.

Window FunctionsDate FunctionsData ManipulationPubmatic
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5
Technical Fundamentals4 questions · ~35 min
OS Context SwitchingEasy

Tests operating system concepts and performance implications of scheduling and context switches.

Decision MakingperformancebasicsPubmatic
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6
Execution3 questions · ~26 min
Fault-Tolerant Distributed ClusteringHard

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

distributed systemsRisk Assessmentfault tolerancePubmatic
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7
More topics7 questions · ~61 min
Streaming API and Top 10Hard

Tests system design for streaming ingestion and efficient top-k retrieval.

streamingAPIsPubmatic
Snake and Ladder System DesignMedium

Tests object-oriented design skills and ability to model state and interactions cleanly.

abstractionFrameworksrequirementsPubmatic
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