Walmart Interview Experience for SDE-2 | On-Campus 2021 (Virtual)
Interview Experience
Walmart Global Tech visited our campus for hiring students for the role of SDE 2. There were a total of 4 rounds.Round 1 (Coding Test): This was an online coding assessmen...
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Walmart Global Tech visited our campus for hiring students for the role of SDE 2. There were a total of 4 rounds. Round 1 (Coding Test): This was an online coding assessment. The platform was HackerEarth and the time duration was 1 hour. 10 technical MCQs on OOPS, OS, DBMS, Networking, and SQL 2 coding questions based on graphs and strings A total of 26 students were shortlisted after this round. Round 2 (Technical Round - 75 Mins): This round was conducted on Zoom. The interviewer started with a brief introduction of myself. Then he asked me about my projects and a few questions based on my resume. After this, he asked me the following questions: Difference between C, C++, Java, and Python. He asked me to code a program to check if a string is a palindrome or not. I wrote a function for this but the interviewer asked me to do this via recursion too. What are inheritance and polymorphism? What is normalisation? Difference between DBMS and RDBMS. Difference between Dynamic memory allocation and Static memory allocation. Difference between constants and variables? What is a memory leak? What is exception handling? He then asked me to write a code for finding whether a number is an Armstrong number or not using a while loop and do-while loop. Difference between while and do-while loop. After this, he showed me the following pattern and asked me the number of 'for' loops that will be required to write this pattern. A ABA ABCBA ABCDCBA ABCDEDCBA What is ASCII value? How can we convert ASCII to char and char to ASCII? What are preprocessor directives? After this round, 18 students were selected for the
next round. Round 3 (Technical Round - 70 mins): It started with my introduction but then the interviewer skipped asking me about my resume in this round. He asked me the following questions: How do we add repositories on git? After this, he started checking my knowledge in different data structures: What is a multidimensional array? How do we take the input and output of a 2D array? What is a Linked List? Difference between array and linked list. What is a stack and the meaning of different operations with examples What is a queue and the meaning of different operations with examples Explain linear search with example Explain binary search with example Explain bubble sort with an example Explain quick sort with an example He showed me a SQL query and asked me to explain it. Write a SQL query to find the second maximum salary from a given table. He again asked me about polymorphism and inheritance. What is exception handling and explain it via a code What is multithreading? Difference between process and thread How do we declare an object in C++ and Java? Then he asked me a puzzle - https://www.geeksforgeeks.org/aptitude/puzzle-1-how-to-measure-45-minutes-using-two-identical-wires/ In between the interview, he also asked me to show my whole room by rotating my camera. In this round, 13 students were shortlisted. Round 4 (Technical Round - 35 mins): The interview asked for my introduction and asked me some questions about my resume. He then asked me the following question: Difference between Linear data structures and non-linear data structures. He then asked me to code a program to check whether the input string of parentheses is valid or not. - https://leetcode.com/problems/valid-parentheses/ Results were announced by the end of the day, and a total of 10 students were selected for the role of FTE.
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About Walmart Interview Reports
This question was reported by a candidate who interviewed at Walmart. 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 Walmart are the higher-signal extractions to take from this report.
For broader preparation context, the Walmart 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 Walmart reports consistently are the ones worth investing in; one-off niche problems are not.
During Your Walmart 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 Walmart 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.