'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
Software Engineer
Paytm (One97 Communications Limited)
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3 rounds | 12 Coding problems
Interview preparation journey
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Preparation
Duration: 2 months
Topics: DSA, OOPs, Computer Networking, System Design ,OOPs
Tip
Tip

Tip 1 : Properly grasp over basic concepts
Tip 2 : Prepare good for DS & Algo as most companies have a separate round for it.
Tip 3 : Don't lie over your resume

Application process
Where: Campus
Eligibility: 10th /12 th-60 % Btech-7 CGPA
Resume Tip
Resume tip

Tip 1 : Don't Lie over your resume
Tip 2 : Avoid unnecessary details like Hobbies, family details, declaration, date, signature, etc.

Interview rounds
01
Round
Medium
Online Coding Interview
Duration70 minutes
Interview date16 Aug 2020
Coding problem3

It consisted of three coding questions varying from easy to medium.

1. Distributing Coins
Moderate
45m average time
55% success
0/80
Asked in companies
RazorpayWalmartPaytm (One97 Communications Limited)

You are given the ‘ROOT’ of a binary tree with ‘N’ nodes where each node in the tree has some coins, and there are ‘N’ coins total. In one move, we may choose two adjacent nodes a...

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2. Generate subsets of string
Moderate
40m average time
65% success
0/80
Asked in companies
MicrosoftPaytm (One97 Communications Limited)Tata Consultancy Services (TCS)

Given an array arr of N integers that may contain duplicate integers. The task is to return the count of subsets of the given array such that each subset contains only distinct elements.

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3. 0-1 knapsack.
Easy
15m average time
85% success
0/40
Asked in companies
SwiggyIxigoPaypal

A thief is robbing a store and can carry a maximal weight of W into his knapsack...

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02
Round
Medium
Video Call
Duration60 minutes
Interview date18 Aug 2020
Coding problem4

The interview was focused on data structures as well as computer fundamentals along with puzzles.

1. Sort an array in wave form
Easy
10m average time
85% success
0/40
Asked in companies
SAP LabsPaytm (One97 Communications Limited)Amazon

You have been given an unsorted array ‘ARR’.

Your task is to sort the array in such a way that the array looks like a wave array.

Example:
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2. Reverse a linked list
Easy
15m average time
85% success
0/40
Asked in companies
FlipkartPaytm (One97 Communications Limited)Hexaware Technologies


Example:

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3. Puzzle

Assuming the best cricketer playing with the best strategy. How many maximum runs he can score in ipl satisfying all rules of cricket and NO wide balls.

4. Operating Systems

What is virtual memory .
What are page faults.
What is kernel

03
Round
Easy
Video Call
Duration90 minutes
Interview date18 Aug 2020
Coding problem5

The Round was mainly focused on resume+ dsa + system design +computer fundamentals

1. Running median
Hard
46m average time
50% success
0/120
Asked in companies
SprinklrMyntraHike

You are given a stream of 'N' integers. For every 'i-th' integer added to the running list of integers, print the resulting median.

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2. DBMS

LRU Cache Implementation

3. Data Structure

Design a stack that supports getMin() in O(1) time and O(1) extra space

4. DBMS

What is segementation.
Difference between internal and external fragmetation

5. DBMS

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

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