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Wayfair Data Analyst Intern Interview Questions and Answers

Updated 22 Oct 2024

Wayfair Data Analyst Intern Interview Experiences

1 interview found

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Behaviourial 

(2 Questions)

  • Q1. How do you work with a team
  • Q2. Tell me about your recent project
  • Ans. 

    Developed a predictive model for customer churn in a telecom company

    • Used machine learning algorithms such as logistic regression and random forest

    • Performed data preprocessing and feature engineering to improve model performance

    • Evaluated model performance using metrics like accuracy, precision, and recall

  • Answered by AI

Interview questions from similar companies

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Nov 2024. There was 1 interview round.

Round 1 - Group Discussion 

Asked a few questions regarding my experience

Data Analyst Interview Questions & Answers

Practo user image Pratik Chaudhari

posted on 17 Nov 2015

I applied via Referral

Interview Preparation Tips

Round: Resume Shortlist
Experience: Sent resume to an HR through Linkedin and got the call for interview

Round: Technical Interview
Experience: Had 3 rounds of technical interviews with Product Owner, Product Manager and VP Product. Most of the questions were related to maths, statistics and a few on machine learning. Even though I did not have much background on these, I was asked to give my inputs and try to find a solution. We discussed recommendation engines for Quora, Linkedin and e-commerce websites. Then they asked me how can we remove the bias that comes in the practo ratings of the doctors due to feedback from various channels. How can we identify if the customer is booking an appointment by looking at reviews or ratings? How can we identify spam reviews before publishing them? How can we build a product which can help users write a better quality review? Most of the questions were related to data science and how we can improve the products using data. The data analyst role for which I was being interviewed, was a first of its kind role in Practo. The JD was to basically work with the product team and help them in improving products, building new features etc. using data science/ data analytics.

Skills: Product Sense, Attitude, Data Science, Data Analysis, Basics Of Machine Learning
College Name: IIT Madras
Motivation: being the leader of the healthcare industry, high growth startup, opportunity to solve interesting problems using data
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Recruitment Consulltant and was interviewed before Jan 2023. There were 2 interview rounds.

Round 1 - Technical 

(3 Questions)

  • Q1. Program for a palindrome Number.
  • Ans. 

    Program to check if a number is a palindrome.

    • Convert the number to a string to easily check for palindrome

    • Reverse the string and compare it with the original string

    • If they are the same, the number is a palindrome

  • Answered by AI
  • Q2. React Lifecycle methods
  • Q3. Hooks in react?
  • Ans. 

    Hooks are a feature in React that allow you to use state and other React features in functional components.

    • Hooks were introduced in React 16.8.

    • They allow you to use state and other React features without writing a class.

    • Commonly used hooks include useState, useEffect, useContext, and useReducer.

    • Hooks must be used at the top level of your functional component.

    • Example: const [count, setCount] = useState(0);

  • Answered by AI
Round 2 - Technical 

(2 Questions)

  • Q1. Create a High-level design
  • Ans. 

    Design a high-level architecture for a software system

    • Identify the main components of the system

    • Define the interactions between the components

    • Consider scalability, security, and performance

    • Choose appropriate technologies and frameworks

    • Create a diagram to visualize the architecture

  • Answered by AI
  • Q2. Questions on the design you created

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Delete nth node from end in linked list
  • Ans. 

    To delete the nth node from the end in a linked list, we can use a two-pointer approach.

    • Use two pointers, one to traverse the list and another to keep track of the nth node from the end.

    • Move the second pointer n steps ahead of the first pointer.

    • When the second pointer reaches the end of the list, the first pointer will be at the nth node from the end.

    • Adjust the pointers to delete the nth node.

  • Answered by AI
  • Q2. Project discussion

Interview Preparation Tips

Interview preparation tips for other job seekers - revise your latest projects and technologies used thoroughly, prepare trees and linked list in DSA

Skills evaluated in this interview

I applied via Referral and was interviewed before Dec 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Technical questions like oops concepts dbms

Interview Preparation Tips

Interview preparation tips for other job seekers - good interview with 3 rounds

I applied via Walk-in and was interviewed in Sep 2021. There was 1 interview round.

Round 1 - HR 

(3 Questions)

  • Q1. What is your family background?
  • Q2. What are your salary expectations?
  • Q3. Tell me about yourself.

Interview Preparation Tips

Interview preparation tips for other job seekers - Focus on the employer’s needs.
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Mar 2023. There were 3 interview rounds.

Round 1 - Coding Test 

4 questions , 3 DSA questions medium level and 1 DB design round

Round 2 - One-on-one 

(1 Question)

  • Q1. Questions on OOPs, Networking, OS app development, projects and DSA questions
Round 3 - One-on-one 

(1 Question)

  • Q1. DB related questions (joins,query) and Linked list medium DSA question.
Interview experience
4
Good
Difficulty level
Easy
Process Duration
-
Result
-

I applied via Naukri.com and was interviewed in Jun 2024. There was 1 interview round.

Round 1 - Coding Test 

The coding test was divided in 4 sections:
1> Java and SpringBoot multiple choice questions
The question topics included, multihreading, springboot context, security

2> Leetcode style program question 1 - Easy

3> Leetcode style program question 2 - Medium
Length of longest consecutive ones by at most one swap.

4> Sql query question

I was interviewed in Aug 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 minutes
Round difficulty - Medium

This round had 3 coding questions of Medium to Hard level of difficulty.

  • Q1. 

    Intersection of Two Unsorted Arrays Problem Statement

    Given two integer arrays ARR1 and ARR2 of sizes 'N' and 'M' respectively, find the intersection of these arrays. The intersection is defined as the se...

  • Ans. 

    Find the intersection of two unsorted arrays while maintaining the order of elements from the first array.

    • Iterate through the elements of the first array and check if they exist in the second array.

    • Use a hash set to keep track of elements already seen in the second array for efficient lookup.

    • Maintain the order of elements from the first array while finding the intersection.

    • Handle duplicate elements in both arrays appro...

  • Answered by AI
  • Q2. 

    Ways To Make Coin Change

    Given an infinite supply of coins of varying denominations, determine the total number of ways to make change for a specified value using these coins. If it's not possible to make...

  • Ans. 

    The task is to determine the total number of ways to make change for a specified value using given denominations.

    • Create a function that takes in the number of denominations, the denominations array, and the value to make change for as input

    • Use dynamic programming to iterate through all possible combinations of coins to make the specified value

    • Keep track of the number of ways to make change for each value from 0 to the ...

  • Answered by AI
  • Q3. 

    Longest Substring Without Repeating Characters Problem Statement

    Given a string S of length L, determine the length of the longest substring that contains no repeating characters.

    Example:

    Input:
    "abac...
  • Ans. 

    Find the length of the longest substring without repeating characters in a given string.

    • Use a sliding window approach to keep track of the longest substring without repeating characters.

    • Use a hashmap to store the index of each character in the string.

    • Update the start index of the window when a repeating character is encountered.

    • Calculate the maximum length of the substring as you iterate through the string.

  • Answered by AI
Round 2 - Video Call 

(4 Questions)

Round duration - 60 minutes
Round difficulty - Medium

This round started with 2 coding questions and then moved on to some more questions from OOPS.

  • Q1. 

    Palindrome Linked List Problem Statement

    You are provided with a singly linked list of integers. Your task is to determine whether the given singly linked list is a palindrome. Return true if it is a pali...

  • Ans. 

    Check if a given singly linked list is a palindrome or not.

    • Traverse the linked list to find the middle element using slow and fast pointers.

    • Reverse the second half of the linked list.

    • Compare the first half with the reversed second half to determine if it's a palindrome.

  • Answered by AI
  • Q2. 

    Search Element in a Rotated Sorted Array

    Given a sorted array that has been rotated, the task is to find the index of a specific element. The array is initially sorted in ascending order and then rotated ...

  • Ans. 

    Search for an element in a rotated sorted array efficiently in O(logN) time complexity.

    • Implement binary search to find the pivot point where rotation occurs.

    • Divide the array into two subarrays and perform binary search on the appropriate subarray.

    • Handle cases where the element may be in the left or right subarray after rotation.

    • Return the index of the element if found, else return -1.

  • Answered by AI
  • Q3. What is a static variable in C?
  • Ans. 

    A static variable in C is a variable that retains its value between function calls.

    • Declared using the 'static' keyword

    • Retains its value throughout the program's execution

    • Useful for maintaining state across function calls

  • Answered by AI
  • Q4. What is the difference between abstraction and inheritance?
  • Ans. 

    Abstraction is hiding the implementation details while inheritance is a mechanism for creating new classes using existing classes.

    • Abstraction focuses on hiding the internal implementation details of a class, allowing the user to only interact with the necessary information.

    • Inheritance allows a class to inherit properties and behavior from another class, promoting code reusability and creating a hierarchy of classes.

    • Abs...

  • Answered by AI
Round 3 - Video Call 

(4 Questions)

Round duration - 60 minutes
Round difficulty - Medium

This round had questions mainly from HTML,CSS and JavaScript as I had mentioned some Frontend Projects in my resume so the interviewer wanted to check my skills on those. He also asked me some SQL queries and a simple coding question towards the end of the interview.

  • Q1. What is event bubbling in JavaScript?
  • Ans. 

    Event bubbling is the process where an event triggered on a child element is propagated up through its parent elements.

    • In event bubbling, when an event occurs on a child element, it first runs the event handlers on the child element, then on its parent, then all the way up to the top level of the DOM.

    • Event bubbling allows for delegation of event handling to a parent element, reducing the number of event listeners neede...

  • Answered by AI
  • Q2. How can you optimize the loading of website assets?
  • Ans. 

    Optimizing website asset loading involves minimizing file sizes, reducing HTTP requests, utilizing caching, and prioritizing critical resources.

    • Minimize file sizes by compressing images, scripts, and stylesheets.

    • Reduce HTTP requests by combining files, using sprites, and lazy loading non-essential resources.

    • Utilize browser caching to store static assets locally for faster subsequent page loads.

    • Prioritize critical resou...

  • Answered by AI
  • Q3. In how many ways can you display HTML elements?
  • Ans. 

    There are multiple ways to display HTML elements, including inline, block, inline-block, and flex.

    • HTML elements can be displayed as inline, which allows them to flow with surrounding content.

    • Block elements take up the full width available and start on a new line.

    • Inline-block elements are displayed as blocks, but flow like inline elements.

    • Flexbox allows for more advanced layout options, such as aligning items and distri

  • Answered by AI
  • Q4. 

    Check if Two Strings are Anagrams

    Anagrams are words or names that can be formed by rearranging the letters of another word. For instance, 'spar' can be rearranged to form 'rasp', making them anagrams.

    E...

  • Ans. 

    Check if two strings are anagrams by rearranging their letters.

    • Create a frequency map of characters for both strings

    • Compare the frequency maps to check if they are equal

    • Return True if the frequency maps are equal, else False

  • Answered by AI
Round 4 - HR 

(2 Questions)

Round duration - 30 minutes
Round difficulty - Easy

This is a cultural fitment testing round. HR was very frank and asked standard questions. Then we discussed about my role.

  • Q1. What is something about you that is not included in your resume?
  • Q2. Why should we hire you?

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAPracto interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, DBMS, JavaScript, HTML, CSS, OOPSTime required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

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Wayfair Data Analyst Intern Interview Process

based on 1 interview

Interview experience

5
  
Excellent
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