Walmart Interview Experience by vandana singh | Off Campus - Jun 2021

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Walmart interview experience Real time questions & tips from candidates to crack your interview

SDE - 2

Walmart

5 rounds | 12 Coding problems

vandana

Experienced | Jun 2021

Selected

Interview preparation journey

Journey

My journey started in my college when I first learned to code. Then onwards, I have practised alot from Leetcode and Code studio. Later on, I also tried competitive programming as well. Along with DSA, I made sure that I maintain a good CGPA. After working for almost 3 years in my first company, I was looking for a job switch after getting promoted.

Application story

I saw a post of HR person on LinkedIn and requested them to consider. After almost seven days of applying, I received a mail from the HR that I am shortlisted to sit for further interview rounds.

Why selected/rejected for the role?

I was selected because of my strong knowledge of core fundamentals and DSA. I gave optimised approaches for almost all the coding questions that I was asked and did a dry-run as well. Confidence is the main key to selection in interviews.

Preparation

Duration: 3 Months

Topics: Data structures, Algorithms, OOPS, OS, DBMS, Computer Networks

Tip

Tip 1 : Make sure you have your computer science fundamentals very clear.
Tip 2 : Should know the complexity of code you write and should know the internal implementation of data structure you use while coding.
Tip 3 : Should know about everything you write in resume.
Tip 4: Practice a lot of programming problems. Participate in competitive programming contests.

Application process

Where: Other

Eligibility: 7 CGPA

Resume tip

Tip 1 : Be honest about what you write in resume.
Tip 2 : Should have at least 2 projects
Tip 3 : Maintain a precise and self speaking one page resume.
Tip 4 : Add technical achievements only.

Interview rounds

Round

Easy

Online Coding Interview

Duration30 Minutes

Interview date12 Jun 2021

Problems2

MCQ Challenge was to test basic computer fundamentals. The quiz had 30 questions to be attempted in 25 minutes consisting questions related to Data structures and algorithm, OOPS, OS, DBMS and some questions to find the output of Java Program.
Platform was fast and responsive, and we were not allowed to switch through tabs during the test.

1. Technical Questions

What is a basic form of GRANT statement?

Calculate the result of the following prefix expression: +,-,*,8,4,/,6,2,5

If a new node is added into a red-black tree, which statements are true ?

What is the complexity of enqueue and dequeue operation in a queue?

2. Maximum Depth Of A Binary Tree

You are given the root node of a binary tree with N nodes, whose nodes have integer values. Your task is to find the maximum depth of the given Binary tree.

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Round

Hard

Online Coding Test

Duration90 minutes

Interview date13 Jun 2021

Problems2

90 minutes is what we get to present a logical coding solution to the challenge presented to us. There were 2 coding questions and we can submit the answer as many times we want. There were hidden test cases and after submitting we could only see the score.

1. Maximum In Sliding Windows Of Size K

Given an array/list of integers of length ‘N’,...

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2. String Transformation

Given a string (STR) of length N, you have to create a new string by performing the following operation:

Take the smallest character from the first 'K' c...

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Round

Medium

Video Call

Duration40 Minutes

Interview date16 Jul 2021

Problems3

It was the first technical round conducted on Zoom held for about 40 min. The video was enabled for this round. Computer fundamentals and problem solving was checked in this round.

1. Maximum Number

You are given an array of N elements. This array represents the digits of a number. In an operation, you can swap the value at any two indices. Your task is to find the maximum nu...

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2. Technical Questions

Exception handling in C++ in detail.

What do mean by OOPS.

What is inheritance.

Create a database to store the information of employees and their salaries (just explain)

What are insertion, deletion and updating anomalies in DBMS.

What's polymorphism ?

Write code to show run time polymorphism.

3. Equilibrium Index

You are given an array Arr consisting of N integers. You need to find the equilibrium index of the array.

An ind...

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Round

Easy

Video Call

Duration30 Minutes

Interview date16 Jul 2021

Problems3

It was the first technical round conducted on Zoom held for about 40 min. The video was enabled for this round.

1. Technical Questions

1. Whats polymorphism - compile time and run time.
2. What are exceptions in Java - Since my primary language was C++, I explained exception in C++ only.
3. What are collections in Java- list, map, set

4. Whats binary search - only explain with dry run on an example.
5. Name all the sorting algorithm you have studied and which algorithm to be used for larger inputs.

2. SQL Question

Write a SQL query to print the highest salary of each department in a employee table that contains employee details - department to which employee belong, salary of employee.

3. Maximum Frequency Number

Ninja is given an array of integers that contain numbers in random order. He needs to write a program to find and return the number which occurs the maximum times in the...

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Round

Easy

HR Round

Duration30 Minutes

Interview date16 Jul 2021

Problems2

This was the final round held for about 30 min on Zoom. My video was enabled all the time and basic HR questions were being asked.

1. Basic HR Questions

Introduce yourself.

What did you do in the last year to improve your knowledge?

Explain the difference between group and team. Are you a team player?

What is your ideal company or workplace?

Problem approach

Tip 1 : Start by telling about your education.
Tip 2 : Then tell about your technical experiences - what projects you worked on, what was your part in team.
Tip 3 : Lastly, tell that how can you be asset to the organization

2. Puzzle

You are trying to cook an egg for exactly fifteen minutes, but instead of a timer, you are given two ropes which burn for exactly 1 hour each. The ropes, however, are of uneven densities – i e , half the rope length-wise might take only two minutes to burn. How can you cook the egg for exactly fifteen minutes?

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