Walmart Labs

Walmart Labs Interview Questions and Tips

1

Walmart Labs Software engineer interview

5.1k views
Mohan KotlaFresherSelected
Application
I was interviewed on-campus at IIT Kharagpur for Software engineer role at Walmart Labs
Interview Process
Test Technical Interview Puzzle Interview Technical Interview HR Interview HR Interview
Round 1

Test

Test Sections
  • Section 1: Coding Test
Interview Experience
Coding test conducted through HackerRank website. There are three codes.I think 1.30 hour duration for the test.
Interview Tips
Practice codes from Geeksforgeeks.com, hackerrank.com, hackerearth.com.
(practice more of dynamic problem examples and 2D array problems (datastructures also).
Round 2

Technical Interview

Interview Questions
  • Question 1: There is 3*3 RUBIX cube, Can you find data structure for solving rubix cube.
  • Question 2: Given array of weights(infinite supply), can you find that given weight can be formed by using those set of weights?(dynamic programming,geeksforgeeks)
  • Question 3: If Redo and Undo operations have to perform, which datastructure can we use?(stack)
  • Question 4: Can you explain me about Router ?
  • Question 5: Can you explain the project that you mentioned in resume?
Interview Experience
They are very friendly. If you stuck some where, they will give you hints to think further. They are so much friendly, You will not get any fear.

Interview Tips
Dont think complicately. They will see our CV before our interview. They will know in which area you are good. Dont argue with them .just answer if you know, otherwise ask for hints.
Round 3

Puzzle Interview

Interview Questions
  • Question 1: Two wire burning puzzle(ans: 45min)
  • Question 2: triangle and three ants puzzle(ans: collision prob: 3/4)
  • Question 3: Explain about how internet works?
  • Question 4: One more coding question from array!
  • Question 5: how to find number of paths in tree such that sum of the values in those nodes will be equal to count?(hint:recursion)
Interview Experience
He is so friendly,
Interview Tips
be prepare puzzles from geekspuzzles and interviewbits.com
Round 4

Technical Interview

Interview Questions
  • Question 1: one simple puzzle?(cant explain through words)
Interview Experience
they are so friendly. Maintain smile. Whatever you are doing, be interactive with them. Dont make them bore.
Interview Tips
Prepare more logical questions too.
Round 5

HR Interview

Interview Questions
  • Question 1: normal HR questions
Interview Experience
I frankly answer every question. I knew that I did well in three technical rounds.so I had hope that I would select.
Interview Tips
Dont panic. Read you resume before going for interview. No need to prepare. Answer according to question.
Round 6

HR Interview

Interview Questions
  • Question 1: It is like Preplacement talk
Interview Experience
They said that there will be another HR round. There it self I saturated with those many rounds. I went inside, but that is not HR round. It is like just interactive session. He asked me, "do you know anything about the company?". I replied him that It developed e-commerce sites and apps related to that. But he said that is not the actual work it is doing. He explained about company for 15 minutes. I realized that he is interested in hiring me. He asking me about Company .Then I said , "sorry sir, I dont know anything about company because I just get to know about that I shortlisted for interview at 6.00clock morning. I dont have time to know about company but I know CEO name(s) and I told to him. He said "will you attend other company interviews?". I replied " I will If you are not hiring me. That depends on your decision". He asked "What will be you next aim?". I replied "I will be in resposible position as you are now". He said "dont go for other company interviews, wait for a second". He came with few gifts and Instructions letter and said "you are finally selected". All the interviewers came to wish me and took selfie. GREAT INTERVIEW EXPERIENCE with GREAT INTERVIEWERS for GREAT COMPANY.
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2

Walmart Labs Software engineer interview

4.2k views
AnonymousFresherSelected
Application
I was interviewed on-campus at NIT Surathkal for Software engineer role at Walmart Labs
Interview Process
Test Technical Interview MANAGERIAL ROUND HR Interview
Round 1

Test

Test Sections
    Interview Experience
    The complete selection procedure consisted of 1 online round and 4 face to face interviews. First online round had 10 MCQs with negative marking followed by 3 quality programming questions.
    Round 2

    Technical Interview

    Interview Questions
      Interview Experience
      In technical rounds, none were straight forward question and you can expect complex problems of DP and Greedy concepts. They also asked me to solve some real time problems given large data and all.
      Round 3

      MANAGERIAL ROUND

      Interview Experience
      Managerial round consisted of few very basic questions followed by my expectations from company, profile I seek etc
      Round 4

      HR Interview

      Interview Questions
        Interview Experience
        The HR round was also kind of similar. He first described his experience at Walmart and then asked me about my interests, family etc.
        Skills

        Skills Tested

        Skill Tips
        For data structures : First go through "Data Structures and Algorithms made Easy" by Narsimha Karumanchi.<br /> For improving coding skills, try to program few random questions of trees and linked list while studying there concepts. Then practice some questions from sites like codechef or codeforces and also try to participate in the competitions that take place on these sites.<br /> For Operating Systems, just go through the book written by "S Galvin" and try to clear concepts of memory management part.<br /> Apart from these main topics, just have a glance at these few topics:-<br /> Database : Basic Queries, Indexing, Transaction.<br /> OOP : Definition with understanding of four features of OOPs.<br /> <br />
        General Tips
        If you want to get a good one, you need to practice. Good companies basically emphasizes much on Data Structures, Algorithms and OS concepts. So one must be very good at it.

        But those concepts help once you reach the interview round which is generally after an online round. In the first online round, most of the questions are from C/C++ aptitude and then few are of general aptitude. One must be very quick at solving these problems. For practicing them, one can refer geeksforgeeks for C/C++ aptitude and some CAT book to see basics of probability, permutation and combination, Work/time concepts.

        For data structures and Algorithm, first solve the book by Narsimha Karumanchi but don't try to see the solution directly. Try as much as you can before seeing the solution as it won't be a waste of time. It will further clarify much of your concepts.

        After completing the book, start solving DS part of geeksforgeeks. Try to cover as much questions of trees and linked lists as possible. Also cover classical problems of Dynamic programming and greedy algorithms.

        Apart from being good at designing algorithms for problems, one must be able to write a working code for it in either of C/C++/Java. This is very important because most of the good companies introduces 2-3 programming questions in the first round itself. Even in interview, they ask to write the program on paper. Hence, try to practice coding too along with studying the above referenced materials.

        It felt awesome when I got selected for Walmart Labs. The interviews were really the best one I faced. I was quite chilled out during the interviews as I already had an offer from Amazon. That may be the reason I was able to solve some of the really good questions. Overall, the experience was quite challenging and amazing.
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        3

        Walmart Labs Statistical analyst interview

        81 views
        AnonymousFresherSelected
        Application
        I was interviewed on-campus at IIT Kharagpur for Statistical analyst role at Walmart Labs
        Interview Process
        Resume Shortlist Test Technical Interview Technical Interview Technical Interview HR Interview
        Round 1

        Resume Shortlist

        Interview Experience
        People having GPA above 7 got shortlisted.
        Round 2

        Test

        Interview Experience
        Test Question Topics
        • Hypothesis Testing
        • Regression (Linear, logistic, lasso etc)
        • Decision tree (Gini Index etc)
        • R square
        • Basic probability distributions
        • Confidence interval
        Some coding questions on R. We have to just predict the output of the given code.
        Almost 10-12 people shortlisted for interview.
        Round 3

        Technical Interview

        Interview Experience
        First question – Introduce Yourself
        In first technical round they asked questions on running time of algorithms, decision tree and k-means clustering. Apart from that some questions were on box plot and central limit theorem and some statistics questions.
        Interview Tips
        Books for preparation –
        For puzzles – Heard on the Street, How to Ace the Brainteaser Interview(MCGRAW-HILL)
        For case study – Victor Chang
        Important Online Courses – The Analytics Edge (Edx), Machine Learning (Coursera)
        Round 4

        Technical Interview

        Interview Experience
        First question – Introduce Yourself
        They asked some probability questions. After that one case study. Case study was basically on how to attract old customers who left walmart. You can ask any type of data from interviewer. After that some more question on probability and statistics and in last one guesstimate question – How many people currently wearing black jacket across all IITs.
        Round 5

        Technical Interview

        Interview Experience
        First question – Introduce Yourself
        Questions from your CV. They will ask questions from your CV. From me they asked explain your project work after that from my courseware information they choosed some subjects and asked question on that. After that they asked one puzzle
        Puzzle Question –
        Design a strategy to win game in a two player game where every player will take one coin at a time from a pile of coins (Assume infinite number of coins) and keep that coin on a Round table. No coin can be placed on the top of another coin. Winner will be who keep last coin on the table.
        Round 6

        HR Interview

        Interview Experience
        HR interview –
        Q-1 Introduce yourself
        Q-2 Greatest Weakness and Strength & what steps you took to reduce that weakness?
        Q-3 Any group work experience.
        Q-4 What you liked most at IIT KGP.
        Q-5 Where you are seeing yourself after 3-years.
        Q-6 How you will convince your senior employee that you are correct when they are exactly opposite of your decision.
        Q-7 Why you want to join Wal-Mart.
        Q- 8 Any question forms us.
        Skills

        Skills Tested

        • Probability And Statistics
        • Algorithm Analysis
        • Puzzle Solving Capability
        • Case Solving Ability
        • Machine Learning
        • Guesstimate Skills
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        4

        Walmart Labs Software engineer interview

        3.3k views
        AnonymousFresherSelected
        Application
        I was interviewed on-campus at NIT Surathkal for Software engineer role at Walmart Labs
        Interview Process
        Round 1

        Interview Experience
        Around 8 of us were selected for the interview round. We sat in different rooms while the interviewers went around asking questions from various topics - Algorithms, OS, DBMS etc. Those guys were very helpful and easygoing.
        Interview Tips
        I just glanced through the concepts from pdfs of textbooks on my computer. Did not spend a single rupee on material. Make sure you're aware of the basic algorithms and data structure questions.
        Round 2

        Interview Experience
        I could not appear for Microsoft and couldn't get through the programming round of Yahoo. Once you write a couple of aptitude and programming tests, you get the feel of it and problem solving becomes easier. Walmart's aptitude round was simple and programming round was, I'd say, tricky. In the interview round, I was off to a horrible start. I spent a lot of time on the first two questions and could see the interviewer losing interest in hiring me. But the third one was straightforward and got me back in the groove. From then on, I managed to answer all but one question, including the first two. If you think you are a bright student, remember that companies want people like you as much as you need good jobs.
        Skills

        Skills Tested

          General Tips
          It's not a World Cup final and you're not Tendulkar. So relax, you don't have the burden of a nation's expectation on you. If you've managed to understand the fundamentals of algorithms, data structures, OS etc., cracking interviews shouldn't be hard. If you've not, then I guess you need at least a couple of months of intense preparation.
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          5

          Walmart Labs Software engineer interview

          3.2k views
          AnonymousFresherSelected
          Application
          I was interviewed on-campus at NIT Surathkal for Software engineer role at Walmart Labs
          Interview Process
          Round 1

          Interview Experience
          Round 1 -Hosted on interviewstreet.comC aptitude and logic questions. 1 hourCoding snippets. 3 questions. 1 hour



          Round 2 -3 Back to back interviews. Each covering a different subject. First was DSA and DAA, next DBMS followed by OS.



          Round 3 -HR interview
          Skills

          Skills Tested

            Resources

            Preparation materials

            Books
            • Cracking the Coding interview - Gayle Laakmann. Browsing through the book once should cover most of the algorithm questions you will face in any interview,
            General Tips
            In an interview you will most likely have to write code on paper. Practice it at least once. It has its own set of challenges (no backspace, syntax correction etc). The interviewer most likely is looking for the ability to think right and not the best answer itself. Walk them through your thought process. Indicate why you think certain options are not viable etc. Make sure they are aware you are thinking about optimizations like space & time complexity, function runtime tradeoffs etc. For example, in DBMS the storage design depends if your client has more write operations than read or if it’s other way around. Clarify these details before approaching the problem Preparation for any company by looking up company question papers, interview process. This can help you identify what a company concentrates on in each stage. For example, somecompanies evaluate you on inane C/C++ questions answers to which are readily available on the net. Some on Java and some have logic questions. Recruiters cycle through a set of questions when it comes to algorithms. Sites like careercup and glassdoor provide questions that have been asked previously
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            6

            Walmart Labs Software engineer interview

            3.1k views
            AnonymousFresherSelected
            Application
            I was interviewed on-campus at IIT Madras for Software engineer role at Walmart Labs
            Interview Process
            Test Interview Interview
            Round 1

            Test

            Duration
            90 Minutes
            Test Sections
              Interview Experience
              Written test (90 minutes)Core20 MCQ on computer science basic subjects2 coding questions on paper
              Interview Tips
              Programming and basic subject knowledge of algorithms, data structures, OS, networks,etc.Algorithms and coding practiceCoding sites like Top Coder, Code Chef and Interview St is necessary to clear the coding written test.
              Round 2

              Interview

              Interview Questions
                Interview Experience
                Three technical interviews.Algorithmic questions are asked and once the strategy to solve it is found, asked to write code for the same on paper. Efficiency is very important.
                Interview Tips
                Cormen will help with algorithms and other subject text books to go through the basics
                Round 3

                Interview

                Interview Questions
                  Interview Experience
                  Be prepared to answer why you want to join the company, and get a background on what they do
                  Interview Tips
                  Choose your companies wisely. Be clear about what kind of company you want to work for.
                  Skills

                  Skills Tested

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