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Jumbotail Technologies Software Developer Interview Questions and Answers

Updated 12 Feb 2024

Jumbotail Technologies Software Developer Interview Experiences

1 interview found

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

(2 Questions)

  • Q1. Problem solving
  • Q2. Basic js question
Round 2 - Coding Test 

System design - ecommers website and project related

Round 3 - Coding Test 

Js + react js questions

Interview questions from similar companies

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

Interview Questionnaire 

9 Questions

  • Q1. Write a regex for email validation?
  • Ans. 

    Regex for email validation

    • Start with a string of characters followed by @ symbol

    • Followed by a string of characters and a period

    • End with a string of characters with a length of 2-6 characters

    • Allow for optional subdomains separated by periods

    • Disallow special characters except for . and _ in username

  • Answered by AI
  • Q2. Parse the XML? and store the output in JSON. Discussed different approaches?
  • Q3. Print prime numbers in a given range and optimize the solution?
  • Ans. 

    Print prime numbers in a given range and optimize the solution.

    • Use Sieve of Eratosthenes algorithm to generate prime numbers efficiently

    • Start with a boolean array of size n+1, mark all as true

    • Loop through the array and mark all multiples of each prime as false

    • Print all the indexes that are still marked as true

  • Answered by AI
  • Q4. Puzzle – 25 horses – 5 lanes, find fastest 3 horses?
  • Q5. Web related questions on Sessions and cookies?
  • Q6. A lot of discussion on my resume, experience etc
  • Q7. Find angle between hour hand and minute hand in clock if time is given? Write a program or pseudo code?
  • Ans. 

    Find angle between hour and minute hand in a clock given the time.

    • Calculate the angle made by the hour hand with respect to 12 o'clock position

    • Calculate the angle made by the minute hand with respect to 12 o'clock position

    • Find the difference between the two angles and take the absolute value

    • If the angle is greater than 180 degrees, subtract it from 360 degrees to get the smaller angle

  • Answered by AI
  • Q8. A hash function was written to convert a string into a hash. Write a un-hash function to revert it(from hash to string)?
  • Ans. 

    To un-hash a string, use a reverse algorithm to convert the hash back to the original string.

    • Create a reverse algorithm that takes the hash as input and outputs the original string

    • Use the same logic as the hash function but in reverse order

    • If the hash function used a specific algorithm, use the inverse of that algorithm to un-hash the string

  • Answered by AI
  • Q9. He discussed about expectations and role. Asked me if I have any questions. He said to me “yaha aana hai to marwani padegi. tyar ho”? I smiled and asked what are the work timings? He said 9-9 and I was kin...

Interview Preparation Tips

General Tips: I applied through a recruiter. Then I got a call from Zomato HR. It was for LAMP developer profile. She asked me about my profile and also shared some expectations from the role. She asked me to come for F2F rounds to take the process further
Skills: Web development, JSON, Algorithm
College Name: na
Motivation: Overall process was not very tough. But they have start up culture. People work their for 11-12 hours a day. Sometimes on Saturday as well. So people who are geeks or have nothing in life to do except their job can go and join

Skills evaluated in this interview

I was interviewed 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...
  • Ans. 

    Reverse a singly linked list by altering the links between nodes.

    • Iterate through the linked list and reverse the links between nodes

    • Use three pointers to keep track of the current, previous, and next nodes

    • Update the links between nodes to reverse the list

    • Return the head of the reversed linked list

  • Answered by AI
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 Recruitment Consultant and was interviewed in May 2020. There were 3 interview rounds.

Interview Questionnaire 

3 Questions

  • Q1. What is diameter of Binary Tree? Write full working code.
  • Ans. 

    Diameter of a binary tree is the longest path between any two leaf nodes.

    • Calculate the height of left and right subtrees recursively.

    • Calculate the diameter recursively using the formula max(left_height + right_height + 1, max(left_diameter, right_diameter)).

    • Return the maximum diameter.

  • Answered by AI
  • Q2. Find interchanged terms from an AP, where terms are arranged in series
  • Ans. 

    To find interchanged terms from an AP series

    • Identify the common difference between terms

    • Swap the positions of adjacent terms

    • Check if the new series is also an AP

    • Repeat until no more interchanged terms can be found

  • Answered by AI
  • Q3. Explain database indexing
  • Ans. 

    Database indexing is a technique to improve the performance of database queries.

    • Indexing creates a data structure that allows for faster retrieval of data.

    • Indexes are created on one or more columns of a table.

    • Queries that use indexed columns can be executed faster.

    • Indexes can be clustered or non-clustered.

    • Clustered indexes determine the physical order of data in a table.

    • Non-clustered indexes create a separate structure...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare well on basic data structures, operating systems and database.

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 applied via Campus Placement and was interviewed before Dec 2020. There were 4 interview rounds.

Interview Questionnaire 

4 Questions

  • Q1. Design a stack that support getmin in O(1) time and O(1) space complexities
  • Ans. 

    Design a stack that supports getmin in O(1) time and O(1) space complexities.

    • Use two stacks, one for storing the actual values and the other for storing the minimum values.

    • When pushing a new value, check if it is smaller than the current minimum value and push it to the minimum stack if it is.

    • When popping a value, check if it is the current minimum value and pop it from the minimum stack if it is.

    • To get the minimum val...

  • Answered by AI
  • Q2. Questions related OS and DBMS
  • Q3. Binary tree traversal
  • Ans. 

    Binary tree traversal is the process of visiting each node in a binary tree exactly once in a specific order.

    • There are three main types of binary tree traversal: inorder, preorder, and postorder.

    • Inorder traversal visits the left subtree, then the root, then the right subtree.

    • Preorder traversal visits the root, then the left subtree, then the right subtree.

    • Postorder traversal visits the left subtree, then the right subt...

  • Answered by AI
  • Q4. LRU cache explanation
  • Ans. 

    LRU cache is a data structure that stores the most recently used items and discards the least recently used items.

    • LRU stands for Least Recently Used

    • It has a fixed size and when the cache is full, the least recently used item is removed to make space for a new item

    • It uses a combination of a doubly linked list and a hash map to achieve O(1) time complexity for both insertion and deletion

    • Example: A web browser cache that ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Good with your programming skills and fundamentals.

Skills evaluated in this interview

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

I applied via Referral and was interviewed in Apr 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Code postorder traversal without using recursion.
  • Ans. 

    Iterative solution using a stack to perform postorder traversal.

    • Use a stack to simulate the recursive call stack.

    • Push nodes in the order of right, left, root.

    • Pop nodes from stack and add to result array.

    • Repeat until stack is empty.

  • Answered by AI
  • Q2. Leetcode Problem 1626 - Best team with no conflicts.
Round 2 - System Design 

(2 Questions)

  • Q1. Design whatsapp with one to one, group messaging and read receipts functionalities. Design the database.
  • Ans. 

    Design a messaging app like WhatsApp with one-to-one, group messaging, and read receipts functionalities.

    • Use a relational database to store user information, messages, and group memberships.

    • Create tables for users, messages, groups, and group memberships.

    • Include columns for message content, sender, receiver, timestamp, and read status.

    • Implement a feature to mark messages as read with read receipts.

    • Use indexes for effic

  • Answered by AI
  • Q2. Questions on dbms, cn and os.

Skills evaluated in this interview

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

(2 Questions)

  • Q1. Tell what is your name
  • Ans. 

    My name is John Smith.

    • Full name is John Smith

    • Common name in English-speaking countries

    • No middle name or initial

  • Answered by AI
  • Q2. What do you do in free time
  • Ans. 

    In my free time, I enjoy hiking, playing video games, and learning new programming languages.

    • Hiking in local trails and national parks

    • Playing video games like Overwatch and Minecraft

    • Learning new programming languages like Python and JavaScript

  • Answered by AI

I was interviewed in May 2022.

Round 1 - Assignment 

Round duration - 120 minutes
Round difficulty - Medium

Round 2 - Video Call 

(1 Question)

Round duration - 120 minutes
Round difficulty - Medium

- Discussion on the first round's assignment
- Was asked about adding unit tests in the assignment
- Fundamental questions on the approach used for the assignment.

  • Q1. What are some things that could have been done better in the system design problem given in the first round?
  • Ans. 

    Some improvements in the system design problem could include better scalability planning, more efficient data storage solutions, and improved error handling.

    • Implementing a more robust caching mechanism to improve performance under heavy load.

    • Optimizing the database schema for better query performance and scalability.

    • Introducing load balancing and horizontal scaling to handle increased traffic.

    • Enhancing error handling t...

  • Answered by AI
Round 3 - Video Call 

(1 Question)

Round duration - 90 minutes
Round difficulty - Medium

Round was with tech lead. Was briefly asked about the problem I solved in the first round. Then I was asked to solve 1 medium level DSA based question. Some discussion on culture fit was also done.

  • Q1. Given the frequency of traffic lights' states, can you determine if there will ever be an invalid state for the traffic signal, and what are the conditions that lead to an invalid state?
  • Ans. 

    Yes, an invalid state can occur if the traffic lights are in conflicting states simultaneously.

    • An invalid state occurs when multiple traffic lights are showing conflicting signals, such as both red and green at the same time.

    • This can happen due to a malfunction in the traffic light system or human error in programming the lights.

    • For example, if a traffic light is stuck showing both red and green signals, it would be co

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in GurgaonEligibility criteriaNo criteriaBlinkit interview preparation:Topics to prepare for the interview - Data structures, Algorithms, Web development, OOP, LLDTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Have clear web dev fundamentals
Tip 2 : Have at least 1 good non-trivial project
Tip 3 : Practice basic DSA questions.

Application resume tips for other job seekers

Tip 1 : For past experience (internship/full time), explain the impact you created instead of only mentioning what you did.
Tip 2 : Don't exceed 1 page.
Tip 3 : Get it cross-checked for mistakes through multiple sources.
Tip 4 : Only put in stuff that you are confident in being able to explain.

Final outcome of the interviewSelected

Skills evaluated in this interview

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Jumbotail Technologies Interview FAQs

How many rounds are there in Jumbotail Technologies Software Developer interview?
Jumbotail Technologies interview process usually has 3 rounds. The most common rounds in the Jumbotail Technologies interview process are Coding Test and Technical.
What are the top questions asked in Jumbotail Technologies Software Developer interview?

Some of the top questions asked at the Jumbotail Technologies Software Developer interview -

  1. Problem solv...read more
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Jumbotail Technologies Software Developer Interview Process

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Jumbotail Technologies Software Developer Salary
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₹8.5 L/yr - ₹24 L/yr
98% more than the average Software Developer Salary in India
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