Paytm Interview Experience | On-Campus 2020

Online Coding Round | Time: 70 minutes | 3 Coding Questions

1. Was based on Number System.
2. Counting the number of minimum currency required for given amount.
3. To find the distance of the closest leaf from a node with given data.

Around 50 students were selected from the coding round and were called for further interview rounds and most of them solved two of them. I also did two only third was giving error and countdown said time is over. 

Round 1(Technical Interview): The interviewer was very friendly. He asked me to introduce my self Then he asked me some question 

1. Length of the longest substring without repeating characters. 
   First, we discussed brute force then he asked me to optimise then we discussed the sliding window approach. He asked me to write a code for this. After writing code he asked me to run on any compiler I did in Xcode. 
   
2. Top View of the binary search tree.
   In this, he just asked me to write the function and explained the approach.  After he was satisfied with both the code then he asked me basic questions on DBMS, OS. 
   
3. Afterward, he asked me about the project and show the project and discussed the pandas, Numpy, Naive Bayes and matplotlib. 

Then he asked me to ask any question, so I asked about feedback like it is my first job interview give me little review he replied with a very positive review I was very happy then. 

After approximately 30 minutes got mail for a second-round interview. 

Round 2(Technical Round): The interviewer was very friendly. He asked me to introduce myself self and then directly he jumped on the coding question. 

1. Print Longest Palindromic Substring 
   Again I started with brute force then he asked for optimisation I discussed the DP approach 
   He asked me to write the code. 
2. Find Maximum sum in an array such that no two elements are adjacent 
   He asked only the approach I explained. 
3. Then he asked some basic oops concept and some SQL query and some os concept too. 

After around 15 min again got mail for the next round. 

Round 3(HR Round): Started with a brief introduction, and then he asked me to tell any topic we can discuss I said os or DBMS 

Then he asked me about semaphore, mutex, and then asked basic schema for a given situation when you are match referee in a chess game, and if anything undesired occurs then you have to restore it. 

Apart from it, he asked me to tell how was my previous interview and basic HR questions. 

A total of 15 people were selected and 3 of them were my close friends..

Tips: Be confident with answers and all the questions were from GeeksforGeeks and hackerrank. 

Verdict – Selected
Thanks a lot to geeksforgeeks for this range of content to help us in our journey.