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Postman interview experience Real time questions & tips from candidates to crack your interview
SDE - Intern
Postman
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2 rounds | 5 Coding problems
Interview preparation journey
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Preparation
Duration: 3 months
Topics: NodeJS, HTTP, TCP, DBMS, Web Architecture
Tip
Tip

Tip 1 : Know NodeJS completely from inside out. Focus on NodeJS event loop and knowing how callbacks occur.
Tip 2 : Have in-depth knowledge of all database concepts. eg. Knowing indexing is not enough, but how it is implemented is.
Tip 3 : Make good projects on NodeJS.
Tip 4 : Have in-depth knowledge of networking concepts especially TCP.
Tip 5 : Know the company better.

Application process
Where: Hackerrank
Eligibility: Reputed College, or good profile.
Resume Tip
Resume tip

Tip 1 : Projects on NodeJS are a must and mentioning javascript too.
Tip 2 : Having a good college name, or Google Summer of Code kind of experiences helps.

Interview rounds
01
Round
Medium
Online Coding Interview
Duration70 minutes
Interview date26 Sep 2020
Coding problem2

It consisted of 17 MCQ based on networking and 3 coding questions. Among those one coding question was on practical implementation.

1. Recycling pens
Easy
15m average time
85% success
0/40
Asked in companies
Morgan StanleyPostmanClearwater Analytics

You have 'N' empty pens whose refills have been used up. You have 'R' rupees in your pocket. You have two choices of operations that you can perform each time.

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2. Data Structures

Given an array A[],and constants b, k and m. A paint job is created using the formula s[i] = (A[i]*s[i-1] + b )% m.
Find all the pairs in s[i] less than equal to K and print them.

Problem approach

The first approach was to Binary Search over every element of the generated array and the rest of the elements.
A better approach was since the array was sorted, use a two-pointer approach to find indexes that contribute to the answer.

02
Round
Hard
Video Call
Duration60 minutes
Interview date16 Oct 2020
Coding problem3

It was around 5-6 p.m. The interviewer was very easy to talk to. They went straight to the questions and asked me if I had any doubts in the end.

1. DBMS

What are ACID properties? Explain them?

Problem approach

Tip 1 : Know every bit of acid property. It's internal working also.


 

2. Questions related to project

Describe the architecture of your project. How did you manage to handle multiple transactions occurring at one point?

Problem approach

Tip 1: Knowledge of everything in your project and why it is special?
 

3. NodeJS

What do you know about NodeJS event loop? Given a set of callback functions. Determine which function runs first.

Problem approach

Tip 1: Good knowledge of NodeJs
 

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