Walmart H.O.D of Physical Education Interview Questions and Answers

Q1. Tell me about yourself
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Q1. How it will work or what is the type of XYZ
Ans. 
The type of XYZ is a software platform that utilizes machine learning algorithms to analyze data and provide insights.
• XYZ is a software platform

• It uses machine learning algorithms to analyze data

• It provides insights based on the analyzed data

• Examples of use cases include fraud detection, predictive maintenance, and customer segmentation
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Round duration - 90 minutes
Round difficulty - Medium

Round duration - 60 minutes
Round difficulty - Medium

This was the technical round, held around at 10 AM IST on Google Meet.
Firstly she greeted me and asked me to tell something about myself, to which I introduced myself, explaining my academic and some projects also.
After that we moved on to the Hackathon project, which was smart cart self-checkout system. I explained the project along with the code, wherever necessary.
Every word you say while explaining should be clear to you.I used Firebase and SQL while explaining my project, to which she asked some questions related to it, 
Then she moved to the DBMS part, types of joins,what is indexing, how to approach if you were to design a payment system.
At last she asked me some Data Structure questions, which were of medium complexity

Q1. 
Remove the Kth Node from the End of a Linked List
You are given a singly Linked List with 'N' nodes containing integer data and an integer 'K'. Your task is to delete the Kth node from the end of this Lin...read more
Ans. 
Remove the Kth node from the end of a singly linked list given the position 'K'.
• Traverse the list to find the length 'N' of the linked list.

• Calculate the position of the node to be removed from the beginning as 'N - K + 1'.

• Traverse the list again and remove the node at the calculated position.
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Q2. 
House Robber Problem Statement
Consider Mr. X, a professional robber who is planning to rob houses along a street. These houses are arranged in a circle, which means the first house is a neighbor to the l...read more
Ans. 
House Robber problem where adjacent houses have connected security system, find maximum money Mr. X can rob without triggering security.
• Use dynamic programming to keep track of maximum money robbed at each house.

• At each house, decide whether to rob the current house or skip it based on maximum money robbed so far.

• Handle the circular nature of houses by considering two cases: robbing the first house and not robbing the ...read more
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Round duration - 30 minutes
Round difficulty - Easy

The interviewer was very frank and cheerful. This was held at 2:30 PM IST on Google Meet.
He firstly greeted me and asked me how I was doing.
How was my previous round, any technical difficulties?
Then he asked me to introduce myself.
He started telling about his journey to Lowe's and his technical background.
Then he asked some HR related questions

Medium SQL, Statistics ,Guesstimate round

Supply and demand price increase, decrease related case study

Domain knowledge and SQL

Q1. Java tricky question related to collections
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Q1. HLD discussion related to current project
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Q1. Javascript questions
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Q1. React redux questions
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Q1. System Design Questions, Situation based problems of system design
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Q2. Data Structure Coding question of HashMap
Ans. 
HashMap is a data structure that stores key-value pairs for efficient data retrieval.
• HashMap allows O(1) average time complexity for insertions and lookups.

• It uses a hash function to compute an index for storing values.

• Example: Inserting a key-value pair like ('apple', 1) allows quick access via 'apple'.

• Collisions are handled using techniques like chaining or open addressing.
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Q1. Again System design, Question from your project and architecture of your project
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Q1. 2 DS questions, 1 SQL question
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Q2. Details of projects worked, containerization, APIs
Ans. 
I have worked on multiple projects involving containerization and developing APIs.
• Developed microservices using Docker containers for easy deployment and scalability

• Created RESTful APIs using Node.js and Express framework

• Integrated third-party APIs for data retrieval and processing

• Utilized Kubernetes for container orchestration and management
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Q1. Python - ML/DS pipeline
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Q2. Java- Springboot framework
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