Paytm interview experience Real time questions & tips from candidates to crack your interview
SWE Intern
Paytm
3 rounds | 5 Coding
problems
Selected Interview preparation journey
Journey
I was in the starting of 4th year and looking for on and off campus SDE intern positions and I had started my preparation mainly in 3 year and started applying online.
Application story
I was very active on LinkedIn those days and used to look at LinkedIn Job Section and I saw opening for SWE intern role at Paytm and I applied within a minute and saw after an hour that the job section was not accepting applications.
Why selected/rejected for the role?
I got selected because my interview went very well and I was able to answer every question the interviewer asked very confidently.
Preparation
Duration: 3 months
Topics: DSA, Backend, SQL, DBMS, Projects (mainly Backend), OOPS.
Tip 1: Consistency (Strivers a2z is more than enough).
Tip 2: Don't Compare with others, your time will come.
Tip 3: Focus on one thing, you have a lot of time, if you use it wisely.
Application process
Where: Linkedin
Eligibility: 7 CGPA, (Stipend: 35k per month)
Tip 1: Choose project according to the company like mine was fintech so I made a project regarding payment and QR code.
Tip 2: One page resume with links of coding profiles and certifications.
Interview rounds
01
Round
Medium
Online Coding Test
Duration120 minutes
Interview date31 Jan 2025
Coding problem2
SQL and DSA questions were asked.
1. Next Permutation
Moderate
15m average time
85% success
0/80
Asked in companies
You have been given a permutation of ‘N’ integers. A sequence of ‘N’ integers is called a permutation if it contains all integers from 1 to ‘N’ exactly once. Your task is to rearrange the numbers and generate the lexicographically next greater permutation.
Problem approach
I used the optimized approach going from the right to the left finding the greater element and solved it.
2. SQL
Write a SQL Query to display the nth highest salary (e.g., 3rd highest). (Practice)
02
Round
Easy
Video Call
Duration60 minutes
Interview date3 Feb 2025
Coding problem2
I was asked technical questions and questions regarding Projects and DSA.
1. Path Sum ll
Moderate
25m average time
75% success
0/80
Asked in companies
Write a program to find the route from which if sum up from root to leaf will equal to the given number which was provided.
Problem approach
Recursive DFS where I go through each node from top to bottom and subtracted the node value if going to leaf if the value is zero then the route is the desired route and return the ans.
2. Javascript
What is the difference between using var and let in a for loop? (Learn)
What will be the output of the following code and why?
for (var i = 0; i < 3; i++) {
setTimeout(() => console.log(i), 100);
}
for (let i = 0; i < 3; i++) {
setTimeout(() => console.log(i), 100);
}
03
Round
Easy
HR Round
Duration20 minutes
Interview date3 Feb 2025
Coding problem1
Engineering manager round, asked mainly projects related and previous internship related questions.
1. HR Questions
- Introduce yourself.
- Tell me about your previous internship.
- Tell me about your Projects and their repositories.
Problem approach
Tip 1: I told about my previous internship as a backend developer in a start-up where I build Udemy like website with authentications using jwt tokens.
Tip 2: Told about final year project
Tip 3: Showed GitHub repository and told about features used in Project.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
What is recursion?
Choose another skill to practice
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