Postman Software Developer Intern Interview Questions and Answers

Round duration - 60 Minutes
Round difficulty - Easy

The platform was HackerEarth time duration was 1 hour.
2 Coding questions were asked, 30 minutes for each were allotted.

Q1. 
Longest Substring Without Repeating Characters Problem Statement
Given a string S of length L, determine the length of the longest substring that contains no repeating characters.
Example:
Input:
"abac...read more
Ans. 
Find the length of the longest substring without repeating characters in a given string.
• Use a sliding window approach to keep track of the longest substring without repeating characters.

• Use a hashmap to store the index of each character in the string.

• Update the start index of the window when a repeating character is encountered.

• Calculate the maximum length of the substring as you iterate through the string.

• Return the m
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Q2. 
Triplets with Given Sum Problem
Given an array or list ARR consisting of N integers, your task is to identify all distinct triplets within the array that sum up to a specified number K.
Explanation:
A t...read more
Ans. 
Identify all distinct triplets within an array that sum up to a specified number.
• Iterate through the array and use nested loops to find all possible triplets.

• Use a set to store unique triplets and check if the sum equals the target sum.

• Handle edge cases like duplicate elements and no valid triplets.

• Time complexity can be optimized using sorting and two-pointer technique.
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Round duration - 120 Minutes
Round difficulty - Hard

This was a 2 hours round, with the following problem statement. At the end of the allotted time you had give a demo and explain your implementation.

Round duration - 45 Minutes
Round difficulty - Medium

The platform was Zoom, time duration was 45 mins. Started with Tell me something about yourself. I told them, that I like solving algorithms and real life problems.

Round duration - 20 Minutes
Round difficulty - Easy

Interviewer was very friendly. Asked few questions about myself and then asked questions about what I know about the company.

Q1. Implement tail f
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Its a basic quantitative and c mcqs

They ask 5 questions .difficulty - easy to medium

Advance coding round 3 hard problems

Q1. Basic oops concepts
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Q2. And my projects and puzzles
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20 question all are fill up type 10 dsa,10 quants

5 question solve atleast 3 to get select for next round

Mini project you have to build java console application

Aptitude and basic programming questions were asked.

6 Easy to Medium level questions were asked from topics like strings, arrays, hashmaps, sorting

Q1. Basic technical questions related to my previous role "JS, node.js"
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Q2. Rest apis, file io in node.js, parallelism vs concurrency
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Railway sum time work

Tree map set hashmap

Railway ticket booking website

Q1. Data structuer related question
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Written test conducted, not mcq, all are fill ups

5 coding questions asked

Console based application

20 questions. 10 apti and 10 coding outputs.

Coding test ranging for 5 hours. You have to solve problems continuously.