'Coding has over 700 languages', '67% of programming jobs aren’t in the technology industry', 'Coding is behind almost everything that is powered by electricity'
Paytm (One97 Communications Limited) interview experience Real time questions & tips from candidates to crack your interview
SDE - Intern
Paytm (One97 Communications Limited)
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4 rounds | 10 Coding problems
Interview preparation journey
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Preparation
Duration: 6 months
Topics: Data Structures, OOPS, Algorithms, C++, Development
Tip
Tip

Tip 1 : Do at least 1 projects at any technology
Tip 2 : Learn DSA at least these topics Array, LL, Tree, DP

Application process
Where: Campus
Eligibility: No criteria
Resume Tip
Resume tip

Tip 1 : At least mention the projects or internships on your resume.
Tip 2 : Avoid unnecessary details like Hobbies, declaration, date.

Interview rounds
01
Round
Easy
Online Coding Test
Duration70 minutes
Interview date2 Nov 2020
Coding problem3
1. Parth And His OCD
Easy
0/40
Asked in company
Paytm (One97 Communications Limited)

Parth is a nerd programmer. He has started learning array/list progr...

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2. Find all occurrences
Moderate
35m average time
60% success
0/80
Asked in companies
HackerEarthTata Consultancy Services (TCS)Salesforce

You are given a 'M' x 'N' matrix of characters, 'CHARACTER_MAT...

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Hard
20m average time
80% success
0/120
Asked in companies
AmazonPaytm (One97 Communications Limited)Uber

You are given an arbitrary binary tree, a node of the tree, and an integer 'K'. You need to find all such nodes which have a distance K from the given node and return the list of these nodes.

...
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02
Round
Easy
Video Call
Duration50 minutes
Interview date12 Dec 2020
Coding problem2

The nature of the interviewer was very kind. The test was proctored, our webcam and mic were on, and shared my screen.

1. Diagonal Traversal of a binary tree.
Easy
10m average time
90% success
0/40
Asked in companies
Expedia GroupOlaMicrosoft

You have been given a binary tree of integers. You are supposed to find the diagonal traversal(refer to Example) of the given binary tree.

Example:

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2. Diameter of the binary tree.
Easy
10m average time
90% success
0/40
Asked in companies
Paytm (One97 Communications Limited)OptumHCL Technologies

You are given a Binary Tree.


Return the length of the diameter of the tree.


Note :
The diameter of a binary tree is the length of the longest ...
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03
Round
Medium
Video Call
Duration50 minutes
Interview date12 Dec 2020
Coding problem2

The nature of the interviewer was very kind, helped me when I stuck. The test was proctored, our webcam and mic were on, and shared my screen.

1. Next Greater Element
Easy
10m average time
90% success
0/40
Asked in companies
Tata Consultancy Services (TCS)IBMNatwest Group

You are given an array 'a' of size 'n'.



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2. Subset Sum Equal To K
Moderate
30m average time
65% success
0/80
Asked in companies
HCL TechnologiesAtlassianDunzo

You are given an array/list ‘ARR’ of ‘N’ positive integers and an integer ‘K’. Your task is to check if there exists a subset in ‘ARR’ with a sum equal to ‘K’.

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04
Round
Easy
Video Call
Duration50 minutes
Interview date12 Dec 2020
Coding problem3

The nature of the interviewer was very kind, helped me when I stuck. The test was proctored, our webcam and mic were on, and shared my screen.

1. Buy and Sell Stock
Hard
0/120
Asked in companies
DirectiAtlassianSamsung R&D Institute

You are Harshad Mehta’s friend. He told you the price of a particular stock for the next ‘n’ days.


You are given an array ‘prices...

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2. DBMS Questions

SQL command
ACID properties
Difference between unique primary and foreign key.

3. OS Questions

What is segementation.
Difference between internal and external fragmentation.

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