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Paytm Money Backend Developer Interview Questions, Process, and Tips

Updated 13 Dec 2024

Top Paytm Money Backend Developer Interview Questions and Answers

  • Q1. Detect Cycle in Undirected Graph Problem Statement You are provided with an undirected graph composed of 'N' vertices and 'M' edges, where vertices are labeled from 1 to ...read more
  • Q2. Zig-Zag Level Order Traversal of Binary Tree Given a binary tree, your task is to perform a zigzag level order traversal. This traversal starts from left to right on the ...read more
  • Q3. SQL Design: There are multiple trains travelling between multiple stations, write a query to find the number of trains between 2 given station.

Paytm Money Backend Developer Interview Experiences

3 interviews found

Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Not Selected

I was interviewed in Nov 2024.

Round 1 - One-on-one 

(2 Questions)

  • Q1. About oops dsa questions based on arrays
  • Q2. Sequencing substring

I was interviewed before Apr 2021.

Round 1 - Video Call 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with 2 DSA problems.

  • Q1. 

    Detect Cycle in Undirected Graph Problem Statement

    You are provided with an undirected graph composed of 'N' vertices and 'M' edges, where vertices are labeled from 1 to 'N'.

    Your task is to determine if...

  • Ans. 

    Detect if there exists a cycle in an undirected graph.

    • Use Depth First Search (DFS) to traverse the graph and detect cycles.

    • Maintain a visited set to keep track of visited vertices.

    • If a visited vertex is encountered again during DFS, a cycle exists.

    • Return 'Yes' if a cycle is found, 'No' otherwise.

  • Answered by AI
  • Q2. 

    Zig-Zag Level Order Traversal of Binary Tree

    Given a binary tree, your task is to perform a zigzag level order traversal. This traversal starts from left to right on the first level, then switches to righ...

  • Ans. 

    Perform zigzag level order traversal on a binary tree.

    • Use a queue to perform level order traversal of the binary tree.

    • Alternate between left to right and right to left traversal for each level.

    • Handle null nodes represented by -1 in the input.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAPaytm money 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 interviewRejected

Skills evaluated in this interview

Backend Developer Interview Questions Asked at Other Companies

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I applied via LinkedIn and was interviewed in Jul 2020. There was 1 interview round.

Interview Questionnaire 

3 Questions

  • Q1. Cycle detection in a directed graph
  • Ans. 

    Cycle detection in a directed graph

    • Use Depth First Search (DFS) algorithm to detect cycles in a directed graph

    • Maintain a visited set to keep track of visited nodes

    • Maintain a recursion stack to keep track of nodes in the current DFS traversal

    • If a node is visited and is already in the recursion stack, then a cycle is detected

  • Answered by AI
  • Q2. Zig Zag order traversal of a binary tree
  • Ans. 

    Zig Zag order traversal of a binary tree is a way to traverse the tree in a zigzag pattern.

    • Start from the root node and traverse the tree level by level.

    • For odd levels, traverse from right to left.

    • For even levels, traverse from left to right.

    • Use a stack to keep track of the nodes to be traversed.

    • Repeat until all nodes have been visited.

  • Answered by AI
  • Q3. SQL Design: There are multiple trains travelling between multiple stations, write a query to find the number of trains between 2 given station.
  • Ans. 

    Query to find number of trains between 2 given stations in SQL design.

    • Use a JOIN statement to join the tables containing train and station information.

    • Filter the results based on the given stations.

    • Count the number of trains in the result set.

    • Consider the direction of travel and the order of the stations in the query.

    • Handle cases where there are no trains between the given stations.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare DSA properly along with SQL and computer fundamentals.

Skills evaluated in this interview

Interview questions from similar companies

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 Jun 2023. There was 1 interview round.

Round 1 - One-on-one 

(2 Questions)

  • Q1. Can remember it but it was simple question from array
  • Q2. Multiple two numbers (given in string only can be very big have to do in traditional way) that can be very big so we have to store result in string

Interview Preparation Tips

Interview preparation tips for other job seekers - As a fresher you can able solve medium questions of dsa not more than that.

I was interviewed before Mar 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 90 Minutes
Round difficulty - Medium

  • Q1. 

    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.

    • Use Floyd's Cycle Detection Algorithm to determine if there is a cycle in the linked list.

    • Maintain two pointers, one moving at double the speed of the other, if they meet at any point, there is a cycle.

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

  • Answered by AI
  • Q2. 

    Next Greater Element Problem Statement

    Given a list of integers of size N, your task is to determine the Next Greater Element (NGE) for every element. The Next Greater Element for an element X is the firs...

  • Ans. 

    Find the Next Greater Element for each element in a list of integers.

    • Iterate through the list of integers from right to left.

    • Use a stack to keep track of elements for which the Next Greater Element is not yet found.

    • Pop elements from the stack until a greater element is found or the stack is empty.

    • Assign the Next Greater Element as the top element of the stack or -1 if the stack is empty.

  • Answered by AI
Round 2 - Face to Face 

(1 Question)

Round duration - 60 Minutes
Round difficulty - Medium

  • Q1. How would you design an ATM machine?
  • Ans. 

    Designing an ATM machine involves considering user interface, security measures, transaction processing, and hardware components.

    • User interface should be intuitive and easy to navigate for users of all ages.

    • Implement security measures such as PIN entry, card authentication, and encryption to protect user data.

    • Transaction processing should be fast and reliable, with options for cash withdrawals, deposits, transfers, and...

  • Answered by AI
Round 3 - HR 

Round duration - 45 Minutes
Round difficulty - Easy

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaNAGroww interview preparation:Topics to prepare for the interview - DSA, Database Systems, OOP, Operating Systems, Computer NetworksTime required to prepare for the interview - 2 MonthsInterview preparation tips for other job seekers

Tip 1 : Practice DSA daily
Tip 2 : Try to think of the solution first before jumping to the solution
Tip 3 : Go through interview experience
Tip 4 : Have mock interviews

Application resume tips for other job seekers

Tip 1 : Know in depth what is there in your resume
Tip 2 : Mention your skills and work properly

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Jul 2020. There were 4 interview rounds.

Interview Preparation Tips

Topics to prepare for Angel One Software Developer interview:
  • Python
  • SQL
Interview preparation tips for other job seekers - Very nice and smooth interview process and quick responses.
Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(1 Question)

  • Q1. Why you want to switch
  • Ans. 

    Seeking new challenges and growth opportunities in a different environment.

    • Desire to work on new technologies and projects

    • Opportunity for career advancement

    • Seeking a better work-life balance

    • Interested in a different company culture or team dynamic

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

DS/ALGO and problem-solving was asked in round one

Interview Preparation Tips

Interview preparation tips for other job seekers - ok process
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Recruitment Consulltant and was interviewed in Aug 2024. There was 1 interview round.

Round 1 - Coding Test 

1 hour 10 mins, MERN Stack, Face to Face. Mongodb, medium DSA Question, callback, eventloop, NodeJS asynchronous working

Interview Preparation Tips

Interview preparation tips for other job seekers - you should have prior experience in coding
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I was interviewed in Jul 2024.

Round 1 - Technical 

(2 Questions)

  • Q1. What is the difference between a static function and a static variable?
  • Ans. 

    Static function is a function that can only be accessed within the same file, while a static variable is a variable that retains its value between function calls.

    • Static function is declared using the 'static' keyword before the return type, limiting its scope to the file it is defined in.

    • Static variable is declared using the 'static' keyword before the variable type, retaining its value between function calls.

    • Example o...

  • Answered by AI
  • Q2. What is the synchronization technique?
  • Ans. 

    Synchronization technique is a method used to control access to shared resources in a multi-threaded environment.

    • Synchronization techniques prevent race conditions and ensure data consistency

    • Common synchronization techniques include locks, semaphores, and monitors

    • Examples include using synchronized keyword in Java or mutex in C++

  • Answered by AI
Round 2 - Coding Test 

Add an element to a linked list.

Paytm Money Interview FAQs

How many rounds are there in Paytm Money Backend Developer interview?
Paytm Money interview process usually has 1 rounds. The most common rounds in the Paytm Money interview process are One-on-one Round.
What are the top questions asked in Paytm Money Backend Developer interview?

Some of the top questions asked at the Paytm Money Backend Developer interview -

  1. SQL Design: There are multiple trains travelling between multiple stations, wri...read more
  2. Cycle detection in a directed gr...read more
  3. Zig Zag order traversal of a binary t...read more

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Paytm Money Backend Developer Interview Process

based on 1 interview

Interview experience

3
  
Average
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