Pubmatic Recruitment Process
Question Details
This article will give you information about the company, its recruitment process,
sample questions that have been asked previously, lots of experiences shared by other as...
Full Details
This article will give you information about the company, its recruitment process,
sample questions that have been asked previously, lots of experiences shared by other aspirants, and the portal where you can apply. About to company: PubMatic creates and deploys online advertising tools and strategies for the digital publishing and advertising industries. PubMatic's sell-side platform enables the world's largest digital content creators to govern access to their inventory and boost monetization by enabling advertisers to drive return on investment and target addressable audiences across ad formats and devices. Recruitment Process:
Round 1 Online Assessment
Round 2 Technical Interview 1
Round 3 Technical Interview 2
Round 4 HR Round Eligibility Criteria:
Online Assessment In this assessment, There will be 3 sections: An aptitude test, and a Technical test including topics c/c++, Java, OOPs, DBMS, Linux, CN, and 2-3 easy to medium level Coding problems. Technical Interview 1: This round will be fully based on data structures and algorithms . The interviewer has to check the candidate's problem-solving skills. Ask technical questions, including topics like C/C++, data structures, OOPs, operating systems, DBMS, and networking, and solve medium-level coding problems. Tips: To answer situational questions, use the star approach. Practice on practice.geeksforgeeks.org and make your DSA strong. Technical interview 2: This round may be a little bit easier than the last round. They will ask questions on the same topics but go into depth and check the candidate's problem-solving skills. They will also ask scenario-based questions and discuss previously completed projects.
HR Round: HR-behavioral questions and general discussion or formalities. Why Pubmatic? How do you rate yourself out of 10? Have you done any internships? Salary expectation? Interview Experience : It is always beneficial if you know what it is to be there at that moment. So, to give you an advantage, we provide you with Interview Experiences of candidates who have been in your situation earlier. Make the most of it. To check all types of interview experiences please go through Pubmatic . Questions ask in Pubmatic: Stock Buy Sell to Maximize Profit Reverse a linked list Program to validate an IP address Inorder Successor in Binary Search Tree Find the index of first 1 in an infinite sorted array of 0s and 1s Lowest Common Ancestor in a Binary Tree We have resources for you from which you can prepare the programming questions that tech companies will ask you in the interview. SDE SHEET – A Complete Guide for SDE Preparation Where to apply: Pubmatic career page Pubmatic LinkedIn page
About This Question
This is a reported interview question from a pubmatic interview for a swe role during the oa round reported in 2025.
It covers the following topics: Linked List, Trees, Binary Tree, Binary Search, Os, Arrays .
Difficulty rating: Easy
Topics
About Pubmatic Interview Reports
This question was reported by a candidate who interviewed at Pubmatic. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.
Use this question as one calibration data point, not a memorization target. Companies typically rotate their question pools every 2-4 months; the exact wording of a 2024 question may differ from what you encounter today. The underlying pattern, difficulty level, and follow-up depth at Pubmatic are the higher-signal extractions to take from this report.
For broader preparation context, the Pubmatic interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.
How To Practice This Type of Question
Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.
Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in Pubmatic reports consistently are the ones worth investing in; one-off niche problems are not.
During Your Pubmatic Round
Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.
The single most predictive failure mode in Pubmatic reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.