Paytm Interview Experience by Hemant Sahu | On Campus - Aug 2020

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SDE - 1

Paytm (One97 Communications Limited)

4 rounds | 6 Coding problems

Hemant Sahu

Fresher | Aug 2020

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Interview preparation journey

Preparation

Duration: 2

Topics: Data Structures, Algorithms, DP, OOPS, Operating Systems, Computer Networks, DBMS

Tip

Tip 1 : DSA is the key. Starting from scratch, one can become proficients in a couple of months.
Tip 2 : Solve questions just a bit outside your comfort zone. Solve too easy to too hard questions is not of any use.
Tip 3 : Be consistent, make a habit of following good coding practices.
Tip 4 : Get to know the ins and out of your projects. You must be very confident while explaining those.
Tip 5 : Don't just directly to system-design, brush up on OOPS principles, networks, OS, DBMS before that.

Application process

Where: Campus

Eligibility: None except no active backlogs

Resume tip

Tip 1: Keep it crisp and to the point. Make bullet points.
Tip 2: Bold the things you want to be paid attention to. Use numbers rather than vague sentences.
Tip 3: Only put the things you are confident about.
Tip 4: Don't put things irrelevant to the job, it only dilutes the main content.

Interview rounds

Round

Medium

Online Coding Test

Duration70 minutes

Interview date6 Aug 2020

Problems3

Timing: 6:00 pm
3 coding questions of medium to be solved in 70 minutes.

Maximum Subarray Sum

Given an array of numbers, find the maximum sum of any contiguous subarray of the array.

For example, given the array [34, -50, 42, 14, -5, 86], the maximum sum would be 1...

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Closest Leaf To Given Node In Binary Tree

Ninja is stuck in a maze which is in a form of a binary tree. He needs your help in order to get out.

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Rotting Oranges

You have been given a grid containing some oranges. Each cell of this grid has one of the three integers values:

Value 0 - representing an empty cell.

Value 1 - r...

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Round

Medium

Video Call

Duration45 minutes

Interview date8 Aug 2020

Problems1

Timing: 2:00 pm
Online round over google meet, code at google docs.
The interviewer was friendly, encouraging, and humble.

Find Smallest Integer

You are given an array 'ARR' consisting of 'N' positive numbers and sorted in non-decreasing order, and your task is to find the sm...

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Round

Medium

Video Call

Duration45 minutes

Interview date8 Aug 2020

Problems1

Timing: 2:00 pm
Online round over google meet, code at google docs.
The interviewer was not speaking much. It was a bit strange.

Bottom Right View of Binary Tree

Given a binary tree. Your task is to print the bottom right view of the binary tree.

Bottom right view, on viewing the given binary tree at the angle of 45 degrees from the bottom right si...

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Round

Easy

HR Round

Duration30

Interview date8 Aug 2020

Problems1

Timing: 7:00 pm
The interviewer was friendly and in a bit of a hurry.

Basic HR Questions

Problem approach

Tip 1: Be confident while you are speaking.
Tip 2: Explain the reason for your choosing something over the other in the project.
Tip 3: Describe how would you have taken the project further if you had more time/resources.

Tip 4: Show enthusiasm and desire to learn.
Tip 5: Exhibit leadership skills when describing your experiences.
Tip 6: Be humble and listen to the feedback ca...