OATS Systems Interview Experience | Set 1 (On-Campus)
Question Details
There were three rounds.Round 1.It was a written round, questions were from algorithms and DBMS1) Find two rectangles overlap2)Find the k-th non-repeating character in a...
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There were three rounds. Round 1. It was a written round, questions were from algorithms and DBMS 1) Find two rectangles overlap 2)Find the k-th non-repeating character in a string 3)Find the row and column index in a two dimensional array in an optimal manner. 4)FInd the set difference with the two arrays. 5)Question related to cursor- DBMS question Almost 20 people were shortlisted from 80 Round 2 (Technical round) 1) Find a palindrome in a given sentence 2)Skip list-elaborate 3)Hash table in detail 4)Sketch all the layers of Networking 5)SMTP protocol in detail 6)Transport layer 7)Python-Significance over c/c++ 8)A query related to group by and having 9)No SQL database meaning with Examples Round 3 (HR round) 1)Rate yourself as a Software engineer 2)Skills a software engineer should have? 3)Ask my 12th cutoff marks 4)And some basic questions related to my family 5)Finally he asked are you ready to relocate to bangalore? I like to thank Geeks for Geeks that helped in preparation.
About This Question
This is a reported interview question from a oats systems interview for a swe role during the recruiter round reported in 2015.
It covers the following topics: Arrays, Strings, Hash Table, Sql .
Difficulty rating: Easy
Topics
About Oats Systems Interview Reports
This question was reported by a candidate who interviewed at Oats Systems. 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 Oats Systems are the higher-signal extractions to take from this report.
For broader preparation context, the Oats Systems 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 Oats Systems reports consistently are the ones worth investing in; one-off niche problems are not.
During Your Oats Systems 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 Oats Systems 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.