Interra Systems Interview Experience | On-Campus 2021
Question Details
Round 1(Online Test): It was a Coding + Aptitude test on Naukri.com PlatformThe breakdown was like this:Quantitative:- 10 questionsLogical Reasoning:- 15 questionsVerbal E...
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Round 1(Online Test): It was a Coding + Aptitude test on Naukri.com Platform The breakdown was like this: Quantitative:- 10 questions Logical Reasoning:- 15 questions Verbal English:- 10 questions Data Structures and Algorithms:- 15 questions Coding Questions:- 5 ( easy level) I Solved 4 Coding Questions and Got Selected for the
next round PS: My Coding is not very good so if you know basic coding and your problem-solving skills are good you can easily crack this round Round 2(Technical Interview 1): Some Basic Questions were asked from: Data Structures and Algorithms OOPs Concepts (Very Important) DBMS (Very Few Questions) I don't remember all the questions but I'll share a few: What is Polymorphism? Write a code to show it Explain Features of OOPS Abstract class ( don't just read definition you need to know in detail) Virtual Keyword Why do we need an abstract class? Explain with some real-life application How can we achieve Abstraction How memory is allocated in C++ Dynamically Create an array Dynamically Create a 2D array delete keyword and new keyword Now Delete this 2D array using the delete keyword Coding Questions:- Maximum Sum Subarray Given a Linked List in which one element is repeating many times you have to modify the list such that it contains only the repeating element Ex:- head - 6-5-3-4-3-2-1-3-8-3-3 Your List Should be:- head - 3-3-3-3-3 Round 3(Technical Interview 2): Again some basic questions on c++ and oops and data structures and algorithms. Which data structure will you use to store a paragraph? Coding Questions:- Y Shaped Linked List. Find the intersection Point Given Two Sorted Arrays you have to merge them in one single array in the minimum time complexity Sort array of 0's 1's and 2's Tip:
Time Complexity is very Important if you Give the Brute Force Solution. They will ask you to write efficient Code. Round 4(Puzzles Round): In this round, they asked me 6-7 Puzzles You can find most of them in GeekforGeeks Practice Puzzles from GfG are a must. Round 5(HR Discussion): T his was just a discussion and basic questions like Why interra Systems? What other offers do you have? Some Questions Regarding Family background Note: Revision of OOPS AND DS ALGO IS MUST Don't forget to read puzzles from GfG. Practice the top 50 questions of Arrays, Strings, and Linked List. For any queries feel free to contact me Can't Wait To see you at Interra! All the best!
About This Question
This is a reported interview question from a interra system interview for a data science role during the oa round reported in 2021.
It covers the following topics: Linked List, Strings, Sql, Arrays, Matrix .
Difficulty rating: Easy
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About Interra System Interview Reports
This question was reported by a candidate who interviewed at Interra System. 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 Interra System are the higher-signal extractions to take from this report.
For broader preparation context, the Interra System 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 Interra System reports consistently are the ones worth investing in; one-off niche problems are not.
During Your Interra System 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 Interra System 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.