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Zolo Software Engineer Interview Questions and Answers

Updated 8 Jul 2024

Zolo Software Engineer Interview Experiences

1 interview found

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

25 basic aptitude asked from train,time and work

Round 2 - Coding Test 

2 coding questions which was basic and medium questions

Interview questions from similar companies

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Technical 

(1 Question)

  • Q1. Launch modes on android
  • Ans. 

    Launch modes on Android determine how a new instance of an activity is associated with the current task.

    • Standard: Creates a new instance of the activity in the task's stack

    • SingleTop: If an instance of the activity already exists at the top of the stack, it will not be recreated

    • SingleTask: Activity is always at the root of the task and no other activities can be on top of it

    • SingleInstance: Similar to SingleTask, but the

  • Answered by AI
Round 3 - Case Study 

Questios based on Activity backstacks

Skills evaluated in this interview

I was interviewed before Apr 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 45 minutes
Round difficulty - Easy

This was a test where 2 coding questions were to be solved in 45 minutes.

  • Q1. 

    Excel Column Number Conversion

    Given a column title as it appears in an Excel sheet, your task is to return its corresponding column number.

    Example:

    Input:
    S = "AB"
    Output:
    28
    Explanation:

    The seq...

  • Ans. 

    Convert Excel column title to corresponding column number.

    • Iterate through the characters in the input string from right to left

    • Calculate the value of each character based on its position and multiply by 26^index

    • Sum up the values to get the final column number

  • Answered by AI
  • Q2. 

    Check Permutation Problem

    Determine if two given strings, str1 and str2, are permutations of each other.

    Explanation:

    Two strings are permutations of each other if the characters of one string can be re...

  • Ans. 

    Check if two strings are permutations of each other.

    • Create character frequency maps for both strings.

    • Compare the frequency maps to check if they are permutations.

    • Handle edge cases like empty strings or strings of different lengths.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAPropTiger 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 interviewRejected

Skills evaluated in this interview

I was interviewed before Feb 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Easy

It comprised of general aptitude questions and two coding questions. It was an offline test.

  • Q1. 

    N Queens Problem

    Given an integer N, find all possible placements of N queens on an N x N chessboard such that no two queens threaten each other.

    Explanation:

    A queen can attack another queen if they ar...

  • Ans. 

    The N Queens Problem involves finding all possible placements of N queens on an N x N chessboard where no two queens threaten each other.

    • Use backtracking algorithm to explore all possible configurations.

    • Keep track of rows, columns, and diagonals to ensure queens do not attack each other.

    • Generate and print valid configurations where queens are placed safely.

    • Consider constraints and time limit for efficient solution.

    • Exam...

  • Answered by AI
  • Q2. 

    Sort 0 1 2 Problem Statement

    Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.

    Input:

    The first line contains an integer 'T' representing the n...
  • Ans. 

    Sort an integer array containing only 0s, 1s, and 2s in linear time complexity.

    • Use three pointers to keep track of the positions of 0s, 1s, and 2s in the array.

    • Iterate through the array and swap elements based on the values encountered.

    • Achieve sorting in a single scan over the array without using any extra space.

  • Answered by AI
Round 2 - Face to Face 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Easy

After having a technical discussion about my CV. He gave me two questions to code.

  • Q1. 

    Ninja and Substrings Problem Statement

    Ninja has to determine all the distinct substrings of size two that can be formed from a given string 'STR' comprising only lowercase alphabetic characters. These su...

  • Ans. 

    Find all unique contiguous substrings of size two from a given string.

    • Iterate through the string and extract substrings of size two

    • Use a set to store unique substrings

    • Return the set as an array of strings

  • Answered by AI
  • Q2. 

    Cycle Detection in a Singly Linked List

    Determine if a given singly linked list of integers forms a cycle or not.

    A cycle in a linked list occurs when a node's next points back to a previous node in the ...

  • Ans. 

    Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.

    • Traverse the linked list using two pointers, one moving one step at a time and the other moving two steps at a time.

    • If the two pointers meet at any point, there is a cycle in the linked list.

    • If one of the pointers reaches the end of the list (null), there is no cycle.

  • Answered by AI
Round 3 - HR 

(1 Question)

Round duration - 30 minutes
Round difficulty - Easy

This was supposed to be the HR round but out of surprise the interviewer started by giving me a question to code. 
After I approached this question with the right solution he just asked about my family. After that he said to wait. After half an hour the results were announced. A total of three students were hired and I was amongst one of them.

  • Q1. 

    Balanced Parentheses Combinations

    Given an integer N representing the number of pairs of parentheses, find all the possible combinations of balanced parentheses using the given number of pairs.

    Explanati...

  • Ans. 

    Generate all possible combinations of balanced parentheses for a given number of pairs.

    • Use recursion to generate all possible combinations of balanced parentheses.

    • Keep track of the number of open and close parentheses used in each combination.

    • Return the valid combinations as an array of strings.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAMagicbricks interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 5 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

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Coding Test 

Data structure - rainwater trapping

Round 3 - Technical 

(2 Questions)

  • Q1. OOPs concept, core java, sql
  • Q2. Car parking lot problem - system design
  • Ans. 

    Design a car parking lot system

    • Determine the size and capacity of the parking lot

    • Create a database to store information about available spots and occupied spots

    • Develop a system to track the entry and exit of vehicles

    • Implement a payment system for parking fees

    • Incorporate security measures such as CCTV cameras and security personnel

    • Provide a user-friendly interface for customers to locate available spots and make payment

  • Answered by AI
Round 4 - Technical 

(2 Questions)

  • Q1. Rapid fire questions
  • Q2. More java springboot

Interview Preparation Tips

Interview preparation tips for other job seekers - medium level difficulty in the interview here.

Skills evaluated in this interview

I was interviewed in Mar 2022.

Round 1 - Face to Face 

Round duration - 120 Minutes
Round difficulty - Medium

Machine Coding Round
2 Hours in Total
15 Mins for Question Explaination and Doubts
1.5 Hours for coding
15 mins to discuss the approach 

Timing - 3 to 5 pm (They are flexible)
Interviewer was very patient and helped me understand the question

Round 2 - Face to Face 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

2 Data Strucutre Questions
Timing 5-6 pm (They are flexible)
Google Meet
Online IDE

  • Q1. 

    Unique Binary Search Trees Problem Statement

    Given an integer 'N', your task is to compute the number of structurally unique BSTs (binary search trees) that can be formed using an exact number of 'N' uniq...

  • Ans. 

    The task is to compute the number of structurally unique BSTs that can be formed using an exact number of unique values.

    • Use dynamic programming to solve the problem efficiently.

    • The number of structurally unique BSTs can be calculated using Catalan numbers.

    • For N nodes, the number of structurally unique BSTs is given by the Nth Catalan number.

    • Example: For N=3, the number of structurally unique BSTs is 5.

  • Answered by AI
  • Q2. 

    Subsequences of String Problem Statement

    You are provided with a string 'STR' that consists of lowercase English letters ranging from 'a' to 'z'. Your task is to determine all non-empty possible subsequen...

  • Ans. 

    Generate all possible subsequences of a given string.

    • Use recursion to generate all possible subsequences by including or excluding each character in the string.

    • Maintain a current index to keep track of the characters being considered.

    • Append the current character to each subsequence generated so far.

    • Recursively call the function with the next index to include or exclude the next character.

    • Base case: When the current ind...

  • Answered by AI
Round 3 - HR 

Round duration - 60 Minutes
Round difficulty - Easy

HIRING MANAGER ROUND

Discussion about the organisation now questions

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNASwiggy interview preparation:Topics to prepare for the interview - Dynamic Programming, Basic OOPS, Commonly Asked Algorithms (Kadane’s, Dutch National Flag and more), Data Structures (Heaps, Stack, Queues, HashMaps and more), Low Level Design (Machine Coding)Time required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

Tip 1 : Practice is they to success, every person will need a different path for preparation, the resources that you should use will depend upon your current expertise.
Tip 2 : For Machine Coding Rounds speed is key, you need to practice atleast 20 questions, Try to figure out techniques to common out code, code out your first question, and then spend good 2-3 hours in reducing no of lines and removing redundancy, try to note down methods you used to achieve less redundancy and for all the next questions you practice try to achieve that same quality from the beginning which will automatically increase your speed
Tip 3 : Do company wise preparation, look for interview experiences and try to map out commonly asked questions and categories of those questions and practice accordingly

Application resume tips for other job seekers

Tip 1 : If applying for any non FE role (or any role that does not require designing or creative skills) keep a minimalistic resume
Tip 2 : Ensure to add a summary at the top which mentions all the criterias HRs consider while short listing resumes (Experience, Degree and Branch, Languages you have experience in, City, Willingness to Relocate, Notice Period, If already on notice period mention your last working day)

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Referral and was interviewed before Aug 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Basic JavaScript Interview

Round 2 - Technical 

(2 Questions)

  • Q1. What is closure
  • Ans. 

    Closure is a function that has access to its own scope, as well as the outer scope in which it was defined.

    • Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

    • It is created whenever a function is defined within another function.

    • Closure is commonly used in JavaScript for maintaining state in asynchronous operations.

  • Answered by AI
  • Q2. What are promise
  • Ans. 

    Promises are objects representing the eventual completion or failure of an asynchronous operation.

    • Promises are used to handle asynchronous operations in JavaScript.

    • They can be in one of three states: pending, fulfilled, or rejected.

    • Promises can be chained together using .then() method.

    • They help avoid callback hell and make code more readable.

    • Example: Fetching data from an API returns a promise that resolves with the da

  • Answered by AI

Software Developer Interview Questions & Answers

NoBroker user image Shreeta Jayakar Shetty

posted on 26 Sep 2024

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(2 Questions)

  • Q1. Introduce yourself
  • Ans. 

    I am a software developer with 5 years of experience in Java and Python. I have a passion for problem-solving and creating innovative solutions.

    • 5 years of experience in Java and Python

    • Passionate about problem-solving

    • Innovative solutions driven

  • Answered by AI
  • Q2. Were u see after 5 years
  • Ans. 

    In 5 years, I see myself as a senior software developer leading a team and working on cutting-edge technologies.

    • Leading a team of developers on innovative projects

    • Working with cutting-edge technologies like AI and blockchain

    • Continuing to learn and grow in my career

    • Possibly pursuing further education or certifications

    • Contributing to open source projects

  • Answered by AI
Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

HAckerrank based test

I was interviewed before Sep 2020.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Easy

  • Q1. 

    0/1 Knapsack Problem Statement

    A thief is planning to rob a store and can carry a maximum weight of 'W' in his knapsack. The store contains 'N' items where the ith item has a weight of 'wi' and a value of...

  • Ans. 

    Yes, the 0/1 Knapsack problem can be solved using dynamic programming with a space complexity of not more than O(W).

    • Use a 1D array to store the maximum value that can be stolen for each weight capacity from 0 to W.

    • Iterate through each item and update the array based on whether including the item would increase the total value.

    • The final value in the array at index W will be the maximum value that can be stolen.

  • Answered by AI
  • Q2. 

    Find the Second Largest Element

    Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.

    If a second largest element does not exist, return -1.

    Example:

    Input:
    ARR = [2,...
  • Ans. 

    Find the second largest element in an array of integers.

    • Iterate through the array to find the largest and second largest elements.

    • Handle cases where all elements are identical.

    • Return -1 if a second largest element does not exist.

  • Answered by AI
Round 2 - Video Call 

(1 Question)

Round duration - 60 Minutes
Round difficulty - Easy

System Design Round

  • Q1. Design a system for Twitter, discussing its architecture, key components, and scalability considerations.
  • Ans. 

    Design a scalable system for Twitter with key components and architecture.

    • Use microservices architecture for scalability and fault isolation.

    • Key components include user service, tweet service, timeline service, and notification service.

    • Use a distributed database like Cassandra for storing tweets and user data.

    • Implement a message queue like Kafka for handling real-time updates and notifications.

    • Use a caching layer like ...

  • Answered by AI
Round 3 - HR 

Round duration - 30 Minutes
Round difficulty - Easy

It is just a formality

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaResume shortlistingSwiggy interview preparation:Topics to prepare for the interview - OOPS, Data Structures, Core Java, Algorithms, DBMS, SQL,Time required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : System Design
Tip 2 : Practice questions from leetcode
Tip 3 : Have some projects.

Application resume tips for other job seekers

Tip 1 : Mention what you know 
Tip 2 : Good previous work to showcase

Final outcome of the interviewSelected

Skills evaluated in this interview

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Zolo Interview FAQs

How many rounds are there in Zolo Software Engineer interview?
Zolo interview process usually has 2 rounds. The most common rounds in the Zolo interview process are Aptitude Test and Coding Test.
How to prepare for Zolo Software 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 Zolo. The most common topics and skills that interviewers at Zolo expect are Architectural Design, Cocoa Touch, Computer science, Design Patterns and Github.

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Zolo Software Engineer Interview Process

based on 1 interview

Interview experience

4
  
Good
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Zolo Software Engineer Salary
based on 4 salaries
₹15 L/yr - ₹16.5 L/yr
88% more than the average Software Engineer Salary in India
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Zolo Software Engineer Reviews and Ratings

based on 2 reviews

3.2/5

Rating in categories

2.3

Skill development

1.3

Work-life balance

2.3

Salary

2.3

Job security

1.3

Company culture

3.2

Promotions

1.3

Work satisfaction

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