PayU interview experience Real time questions & tips from candidates to crack your interview
Fullstack Developer
PayU
4 rounds | 4 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 4 months
Topics: Data Structures, Web Dev, System Design, Algorithms, HLD
Tip 1 : Consistency over aggresiveness.
Tip 2 : Practice at least 200 problems
Tip 3 : Do a couple of projects apart from regular job. My hiring manager was impressed by android project.
Application process
Where: Naukri
Eligibility: Minimum 1 yr exp.
Tip 1: Should have some good projects apart from on job.
Tip 2: Should have properly formatted resume. Work experience should be on top after brief introduction.
Interview rounds
01
Round
Medium
Face to Face
Duration60 mins
Interview date9 Jan 2022
Coding problem1
It had two DSA based questions during evening at around 4PM. Interviewer was helpful and supportive.
1. Sort 0 1 2
Easy
22m average time
0/40
Asked in companies
You have been given an integer array/list(ARR) of size 'N'. It only contains 0s, 1s and 2s. Write a solution to sort this array/list.
Note :
Try to solve the problem in 'Single Scan'. ' Single Scan' refers to iterating over the array/list just once or to put it in other words, you will be visiting each element in the array/list just once.
Problem approach
I gave the optimum approach on the first hand with three pointers.
Maintain three indexes. Initialize first index i as 0 and second index j as 0, and third index k as n-1.
Run the loop until i becomes equal to k
If arr[i] = 1, then increment i (i++).
Else if arr[i] = 0,
Swap values at arr[i] and arr[j]
Increment both i and j (i++, j++).
Else (arr[i] = 2),
Swap values at arr[i] and arr[k]
Decrement k only (k--).
02
Round
Medium
Face to Face
Duration60 mins
Interview date21 Jan 2022
Coding problem1
The round was to test my problem solving ability. It had a puzzle and one system design issue.
1. Design question
Design a System for ticket booking system for a fest of college where 90% seats are reserved for college students and rest are for outsiders. Booking window opens at 10am on a particular day.
Problem approach
Tip 1: You should design every component in distributed manner.
Tip 2: Keep in mind to avoid single point of failure.
Tip 3: Have some identifier for students and non students, like Enrollment number.
03
Round
Medium
Face to Face
Duration60 mins
Interview date21 Jan 2023
Coding problem1
It was a hiring manager round where we discussed about my previous projects and what kind of work I have done. How I managed conflicts with manager if any. Discussed about my non job projects and what all I learned during past 1 year. What is the current new thing I am learning recently apart from tech?
1. Situation based questions
what kind of work I have done?
How I managed conflicts with manager if any.
Discussed about my non job projects and what all I learned during past 1 year.
What is the current new thing I am learning recently apart from tech?
04
Round
Medium
HR Round
Duration60 mins
Interview date18 Feb 2022
Coding problem1
It was HR discussion so he explained about the company. The company's goal and growth and why one can join for a long time here.
1. Basic HR Questions
Your strengths and weakness
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
How do you remove whitespace from the start of a string?
Choose another skill to practice
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