Kellton Tech Solutions Limited interview experience Real time questions & tips from candidates to crack your interview
Software Engineer
Kellton Tech Solutions Limited
2 rounds | 2 Coding
problems
Rejected
Interview preparation journey
Preparation
Duration: 3 MONTHS
Topics: OOPS, DBMS, Algorithms, Array, Data structure.
Tip 1 : Learn new topics regular and revised that topic .
Tip 2 : Apply practically.
Tip 3 : Do a project
Application process
Where: Campus
Eligibility: No percentage criteria(good in aptitude/logic and good in data structure)
Tip 1 : Technology you know, projects
Tip 2 : No false information in your resume
Interview rounds
01
Round
Easy
Online Coding Test
Duration30 minutes
Interview date6 Jan 2021
Coding problem1
It was in the evening. Platform used for this round was hackerrank. Questions were of moderate level.
1. Distinct Subsequences
Moderate
10m average time
80% success
0/80
Asked in companies
You have been given string 'S' of length 'N' that may contain duplicate alphabets. Your task is to return the count of distinct subsequences of it.
For example:
For the given string “deed” :
The possible subsequences are {“”}, {“d”}, {“e”}, {“de”}, {“e”}, {“de”}, {“ee”}, {“dee”}, {“d”}, {“dd”}, {“ed”}, {“ded”}, {“ed”}, {“ded”}, {“eed”} and {“deed”}.
As, {“d”}, {“e”}, {“de”}, {“ed”} and {“ded”} are repeated.
The distinct subsequences are {“”}, {“d”}, {“e”}, {“de”}, {“ee”}, {“dee”}, {“dd”}, {“ed”}, {“ded”}, {“eed”} and {“deed”}
Thus, the output will be 11.
Note:
As the answer can be large, return your answer modulo 10^9 + 7.
02
Round
Medium
Face to Face
Duration30 minutes
Interview date19 Jan 2021
Coding problem1
It was in the night around 9:00PM. Platform used for this round was skype.
1. OS Questions
What are the different operating systems?
What is monolithic kernel?
What is the difference between micro kernel and macro kernel?
Here's your problem of the day 
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Skill covered: Programming
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