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Zepto Staff Engineer Interview Questions and Answers

Updated 10 Jan 2025

Zepto Staff Engineer Interview Experiences

1 interview found

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Instahyre and was interviewed in Dec 2024. There were 2 interview rounds.

Round 1 - System Design 

(1 Question)

  • Q1. Design Google Calendar
  • Ans. 

    Design a user-friendly and efficient calendar application similar to Google Calendar.

    • Allow users to create events, set reminders, and invite others to events

    • Include features like color-coding, recurring events, and integration with other apps

    • Provide a clean and intuitive user interface with easy navigation

    • Implement synchronization across devices for seamless access to calendar

    • Ensure data security and privacy measures a...

  • Answered by AI
Round 2 - System Design 

(1 Question)

  • Q1. Design FASTag system
  • Ans. 

    Design a FASTag system for electronic toll collection

    • Implement RFID technology for vehicle identification

    • Integrate with backend system for toll payment processing

    • Provide users with a mobile app for account management

    • Ensure interoperability with multiple toll plazas and payment methods

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Zepto Staff Engineer interview:
  • HLD
  • System Design

Top trending discussions

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Interview Tips & Stories
1w (edited)
a team lead
Why are women still asked such personal questions in interview?
I recently went for an interview… and honestly, m still trying to process what just happened. Instead of being asked about my skills, experience, or how I could add value to the company… the questions took a totally unexpected turn. The interviewer started asking things like When are you getting married? Are you engaged? And m sure, if I had said I was married, the next question would’ve been How long have you been married? What does my personal life have to do with the job m applying for? This is where I felt the gender discrimination hit hard. These types of questions are so casually thrown at women during interviews but are they ever asked to men? No one asks male candidates if they’re planning a wedding or how old their kids are. So why is it okay to ask women? Can we please stop normalising this kind of behaviour in interviews? Our careers shouldn’t be judged by our relationship status. Period.
Got a question about Zepto?
Ask anonymously on communities.

Interview questions from similar companies

I applied via Campus Placement and was interviewed before Nov 2020. There were 3 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Data Structures
  • Q2. Algorithms knowledge

Interview Preparation Tips

Interview preparation tips for other job seekers - Study DSA and be thorough with projects.

Staff Engineer Interview Questions Asked at Other Companies

Q1. Swap Adjacent Bit Pairs Problem Statement Given an integer N, you ... read more
Q2. Search In Rotated Sorted Array Problem Statement Given a rotated ... read more
Q3. Minimum Jumps Problem Statement Bob and his wife are in the famou ... read more
Q4. Level Order Traversal of Binary Tree Given a Binary Tree of integ ... read more
asked in Nagarro
Q5. How do you write HTML code considering web accessibility for disa ... read more

I applied via Campus Placement and was interviewed in Oct 2019. There were 5 interview rounds.

Interview Questionnaire 

9 Questions

  • Q1. Graph Question:- There is a chessboard. It is different from the normal chessboard. White and black blocks can be anywhere. Source and destination block are given. I was asked to find the path with a mini...
  • Q2. Find the sum of k smallest number in a BST.
  • Ans. 

    Find sum of k smallest numbers in a BST.

    • Traverse the BST in-order and add the k smallest numbers to a sum variable.

    • Use a priority queue to keep track of the k smallest numbers.

    • If k is greater than the number of nodes in the BST, return the sum of all nodes.

    • If k is 0, return 0.

  • Answered by AI
  • Q3. System design of BookMyShow. Design the algorithm and database for the seat booking system. How this the system will handle the case when the payment gets failed. Again he asked me to write the query for...
  • Ans. 

    Design algorithm and database for seat booking system of BookMyShow and handle failed payments.

    • Create a database with tables for movies, theaters, seats, bookings, and payments

    • Use a locking mechanism to prevent double booking of seats

    • If payment fails, release the locked seats and notify the user

    • Write a query to get the timestamp in SQL: SELECT CURRENT_TIMESTAMP;

  • Answered by AI
  • Q4. Write the code for the time stamp in C.
  • Ans. 

    Code for time stamp in C

    • Use the time.h header file

    • Call the time() function to get the current time in seconds

    • Convert the time to a string using strftime() function

    • Use the format string to specify the desired format of the time stamp

  • Answered by AI
  • Q5. Write the code for rearranging the array in consecutive pair multiplication. For example consider an array with 10 element A0, A1, A2......A9. The resultant array will be A0*A1, A1*A2, A2*A3, and so on. Th...
  • Ans. 

    Rearrange array in consecutive pair multiplication in descending order.

    • Create a new array to store the multiplied values

    • Use a loop to iterate through the original array and multiply consecutive pairs

    • Write a compare function to sort the new array in descending order

  • Answered by AI
  • Q6. Write the code to rearrange the array in maximum-minimum form.
  • Ans. 

    Code to rearrange an array in maximum-minimum form.

    • Sort the array in descending order.

    • Create a new array and alternate between adding the maximum and minimum values from the sorted array.

    • Return the new array.

    • Time complexity: O(nlogn)

    • Space complexity: O(n)

  • Answered by AI
  • Q7. What is stoi function (stoi() function)? Its uses and code to Implement stoi function.
  • Ans. 

    stoi() function converts a string to an integer.

    • stoi() is a C++ function that takes a string as input and returns an integer.

    • It is used to convert a string of digits into an integer.

    • It can also handle negative numbers and ignore leading whitespace.

    • Example: int num = stoi("123"); // num is now 123

  • Answered by AI
  • Q8. Write code for Longest Common Substring. (time limit for writing this code was 5-6 minutes)
  • Ans. 

    Code for finding the longest common substring in an array of strings.

    • Iterate through the first string and check for all possible substrings

    • Check if the substring is present in all other strings

    • Keep track of the longest common substring found so far

    • Return the longest common substring

  • Answered by AI
  • Q9. Q: What is a Transaction in DBMS and ACID properties? Q: What is Thread and how it is different from the Process? Q: What are some Linux commands. Write any 5 commands? Q: Why sudo is used for commands?...
  • Ans. 

    Answers to common technical questions in a software engineering interview

    • A transaction in DBMS is a sequence of operations that must be treated as a single unit of work. ACID properties ensure reliability and consistency of transactions.

    • A thread is a lightweight process that shares memory and resources with other threads in the same process. A process is a separate instance of a program.

    • Common Linux commands include ls...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Be confident about what you speak.

Take your step forward. Try to be firstly interviewed if choice arrives ( They get screwed up at the end and ask questions that the previous candidates failed ).

Before approaching the solution to be clear with edge test-cases. Once you are completely sure then come up with an approach.

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. They asked 3 Coding questions and 5 MCQ all of them were very simple. One was related to fibbonaci. Another one was like there was 2d array and at i,j sum till row i and sum till j was given and all the el...

Interview Preparation Tips

Interview preparation tips for other job seekers - I got all three questions correct and also I got a call from recruiter saying that be prepared for interview at tuesday but when i tried calling, He wasn't picking it up. Overall, It was a pathetic experience.

I appeared for an interview before Jan 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Two coding questions were given in the first round to be solved in 60 minutes.

  • Q1. 

    Rearrange Array Elements Problem Statement

    Given an array A containing 'N' integers and an integer m, rearrange the elements of the array such that the differences between the array elements and m are sor...

  • Ans. 

    Rearrange array elements based on their differences from a given integer.

    • Calculate the differences between each element and the given integer.

    • Sort the elements based on their differences while maintaining the original order for elements with the same difference.

    • Implement a function to rearrange the array elements as per the given criteria.

  • Answered by AI
  • Q2. 

    Print Nodes at Distance K from a Given Node

    Given an arbitrary binary tree, a node of the tree, and an integer 'K', find all nodes that are at a distance K from the specified node, and return a list of th...

Round 2 - Face to Face 

(4 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was a technical round with questions based on DSA, DBMS, Computer Networking and project based questions.

  • Q1. 

    Triangle of Numbers Pattern

    Ninja is tasked with printing a triangle pattern based on a given number 'N' for any test case.

    Example:

    Input:
    N = 4
    Output:
       1
    232
    34545
    4567654

    Explanation:

    The pat...

  • Ans. 

    Print a triangle pattern of numbers based on a given number 'N'.

    • Iterate through each row and print the numbers accordingly

    • Use spaces to center-align the numbers in each row

    • Increment the numbers in each row as per the pattern

  • Answered by AI
  • Q2. What is the difference between a web server and an application server?
  • Q3. How does the internet work?
  • Ans. 

    The internet is a global network of interconnected computers that communicate using standardized protocols.

    • The internet is made up of a vast number of interconnected networks of computers.

    • Data is transmitted over the internet using protocols such as TCP/IP.

    • Websites are hosted on servers connected to the internet, and users access them using web browsers.

    • Internet Service Providers (ISPs) provide access to the internet f...

  • Answered by AI
  • Q4. Write a SQL query to find the nth highest salary.
Round 3 - HR 

Round duration - 30 minutes
Round difficulty - Easy

Typical HR round with behavioral problems.

Interview Preparation Tips

Professional and academic backgroundI completed Information Technology from Chitkara University. Eligibility criteriaAbove 7 CGPAInfo Edge India (Naukri.com) interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, 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

I appeared for an interview before Dec 2020.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round was purely based on Data Structures and Algorithms . One has to be fairly comfortable in solving Algorithmic problems to pass this round . Both the questions asked were quite common and luckily I had already prepared them from CodeStudio and LeetCode.

  • Q1. 

    Binary Tree Traversals Problem Statement

    Given a Binary Tree with 'N' nodes, where each node holds an integer value, your task is to compute the In-Order, Pre-Order, and Post-Order traversals of the binar...

  • Ans. 

    Compute the In-Order, Pre-Order, and Post-Order traversals of a Binary Tree given in level-order format.

    • Implement functions to perform In-Order, Pre-Order, and Post-Order traversals of a Binary Tree.

    • Use level-order input to construct the Binary Tree.

    • Traverse the Binary Tree recursively to generate the required traversals.

    • Ensure proper handling of null nodes represented by -1 in the input.

    • Return the three traversals as ...

  • Answered by AI
  • Q2. 

    Reverse Linked List Problem Statement

    Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.

    Input:

    The first line of input is an intege...
Round 2 - Face to Face 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Medium

This round basically tested some concepts from Data Structures and File Manipulation .

  • Q1. 

    Intersection of Two Arrays Problem Statement

    Given two arrays A and B with sizes N and M respectively, both sorted in non-decreasing order, determine their intersection.

    The intersection of two arrays in...

  • Ans. 

    The problem involves finding the intersection of two sorted arrays efficiently.

    • Use two pointers to iterate through both arrays simultaneously.

    • Compare elements at the pointers and move the pointers accordingly.

    • Handle cases where elements are equal and update the intersection array.

    • Return the intersection array as the result.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPABig Basket interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, Operating Systems, Aptitude, OOPSTime required to prepare for the interview - 3 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

I applied via Campus Placement

Interview Preparation Tips

Round: Resume Shortlist
Experience: They selected 10 students from our college from CS and IT .They are looking for guys with extra projects done during college .App development will be a bonus ,contribution to open source and competitive programming will help for shortlisting.
Some of my friends had research papers published and they too got selected.

Round: Test
Experience: Have to write code snippet for 4 questions in 45 minutes
1.Difference between hour hand and minute hand
2.longest palindromic sub string.
3.Product Array puzzle
4.Some question related to matrix

Tips: All question were from geeksforgeeks
So practice it well ..u will make through it

Round: Test
Experience: Long Discussion on projects
They will scan each and every line of your Resume ,so dont write bullshits..
I wrote about interest in AI and got screwed..Discussion on college projects and final year project.
Then asked me to design a snake and ladder game OOPS concepts
Told me to find sum of all elements of sub matrix..(hint pre-processing the matrix)
Asked me about sessions and cookies
Gave a query to write on database indexing (dont remember exactly)
Asked me the code of the difference between hour hand and minute hand and extended it wid the second hand
Asked me as how to implement a dictionary
asked about TRIES ,CODE SNIPPET ON THE SHARED DOCS
One of my friend was asked to implement (set) of STL
Tips: The interviewer was cool guy..helped me a lot always made me comfortable.Interact with them as much as possible

Round: Test
Experience: Wid the CTO of the company .
Started wid the projects again .ACID properties,Database transactions,Concurrency Control
Optimization in database.
Then he asked me to code a function
Given a hash function applied on letters of English words ,un-hash it.Took me 45 minutes to reach the solution ,he helped me a lot.
Asked me to write the code for diameter of a binary tree
Asked me write the code for Boolean Matrix
One of my friend was asked to a question in which there was a bug in a m*n matrix and we have to find the bug(hint dfs or bfs)
Tips: keep calm ,,just keep talking ad he will help u a lot...

Round: HR
Experience: This was the toughest round for me...I had cleared all the rounds but they rejected me in the HR round ,,,dont know where I screwed..Learn every thing of Zomato..
They offered me an internship and thereafter they would look to give a PPO ...!!!lets see what happens

Skills: Coding Skills And Knowledge On Data Structures
Duration: 3
College Name: NIT Srinagar
Are these interview questions helpful?

I appeared for an interview before Jan 2021.

Round 1 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This was a typical DS/Algo where I was asked to solve two questions related to Binary Trees and write the pseudo code for both of them followed by some theoretical questions related to Operating Systems.

  • Q1. 

    K-th Largest Number in a BST

    Given a binary search tree (BST) consisting of integers and containing 'N' nodes, your task is to find and return the K-th largest element in this BST.

    If there is no K-th la...

  • Q2. 

    Is Height Balanced Binary Tree Problem Statement

    Determine if the given binary tree is height-balanced. A tree is considered height-balanced when:

    1. The left subtree is balanced.
    2. The right subtree is bala...
  • Q3. Can you explain the concepts of Zombie Process and Orphan Process in operating systems?
  • Ans. 

    Zombie process is a terminated process that has completed execution but still has an entry in the process table. Orphan process is a process whose parent process has terminated.

    • Zombie process is created when a child process completes execution but its parent process has not yet read its exit status.

    • Zombie processes consume system resources and should be cleaned up by the parent process using wait() system call.

    • Orphan p...

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This was also a Data Structures and Algorithm round where I was asked to solve 3 medium to hard level problems along with their pseudo code within 60 minutes .

  • Q1. 

    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...
  • Q2. 

    Problem: Search In Rotated Sorted Array

    Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer Q queries. Each query is represented by an integer Q[i], and you must ...

  • Q3. 

    Count Subarrays with Sum Divisible by K

    Given an array ARR and an integer K, your task is to count all subarrays whose sum is divisible by the given integer K.

    Input:

    The first line of input contains an...
Round 3 - Face to Face 

(2 Questions)

Round duration - 50 Minutes
Round difficulty - Medium

In this round , I was asked to code a simple question related to BST . After that I was asked the internal implementation of a Hash Map where I was supposed to design a Hash Map using any of the Hashing Algorithms that I know . This was preety challenging for me but I got to learn so much from it.

  • Q1. 

    Ceil Value from BST Problem Statement

    Given a Binary Search Tree (BST) and an integer, write a function to return the ceil value of a particular key in the BST.

    The ceil of an integer is defined as the s...

  • Q2. 

    Design a Constant Time Data Structure

    Create a data structure that maintains mappings between keys and values, supporting the following operations in constant time:

    1. INSERT(key, value): Add or update t...

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAFlipkart interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, 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

I appeared for an interview before Jan 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 Minutes
Round difficulty - Hard

I found the online coding round of Flipkart to be quite difficult based on the constraints of the problem and their time limits. I coded the first problem quite easily but on the second and the third problem , my code could only pass a few test cases and gave TLE for most of them. Both the questions required very efficient solution and the last 5 to 10 Test Cases carried more weight than the rest so I didn't get through this round.

  • Q1. 

    Print the Kth Digit

    Given three non-negative integers N, M, and K, compute the Kth digit from the right in the number obtained from N raised to the power M (i.e., N ^ M).

    Input:

    The first line contains ...
  • Ans. 

    The task is to find the Kth digit from the right in the number obtained from N raised to the power M.

    • Iterate through the digits of N^M from right to left

    • Keep track of the position of the current digit

    • Return the digit at position K from the right

  • Answered by AI
  • Q2. 

    The Skyline Problem

    Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette when viewed from a distance. Each building is ...

  • Q3. 

    Longest Palindromic Substring Problem Statement

    You are provided with a string STR of length N. The goal is to identify the longest palindromic substring within this string. In cases where multiple palind...

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAFlipkart interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 3 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 interviewRejected

Skills evaluated in this interview

I applied via Campus Placement

Interview Preparation Tips

Round: Test
Experience: It was a good one but both questions would have been easy if we know more libraries in java
Tips: Both the questions were related to bigint. It could have been better if both questions were from different areas
Duration: 90 minutes

Round: Technical Interview
Experience: I felt my interview went fine since i was able to answer most of their questions.They gave many hints even if i didn't get the right one
Tips: Everything was fine

Round: HR Interview
Experience: I was able to see myself how i responded to questions asked regarding me and sometimes i was just blabbering
Tips: nothing

General Tips: One must be good at datastrucures and algorithms
Skill Tips: nothing
Skills: Datastructures and Algorithms
Duration: 2
College Name: IIT Madras
Motivation: I wanted to do something for the company where I ordered many of my things
Funny Moments: No funny moments as such but I enjoyed talking to the hr interviewer

Zepto Interview FAQs

How to prepare for Zepto Staff Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Zepto. The most common topics and skills that interviewers at Zepto expect are Android, Biostatistics, Java, Javascript and Kotlin.
What are the top questions asked in Zepto Staff Engineer interview?

Some of the top questions asked at the Zepto Staff Engineer interview -

  1. Design Google Calen...read more
  2. Design FASTag sys...read more

Tell us how to improve this page.

Overall Interview Experience Rating

5/5

based on 1 interview experience

Difficulty level

Moderate 100%

Duration

Less than 2 weeks 100%
View more
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