'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'
Codenation interview experience Real time questions & tips from candidates to crack your interview
SDE - Intern
Codenation
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4 rounds | 6 Coding problems
Interview preparation journey
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Journey
I did not liked this coding thing at all till my school life, but it was the additional subject in the class 12th, and that is when I eventually started to like them. I then took admission to B.Tech in computer science. I was admitted to NIT, Bhopal and practiced DSA from the very first year of college overall, it has been an exciting journey till now.
Application story
I got a message in my telegram group about the company visiting our campus to hire SDE-Intern. As, It was the peak season for the internships, it was sure that I was going to apply for it. I started preparing accordingly (DSA and some Web Dev Basics).
Why selected/rejected for the role?
I was rejected in the HR Round because I thought my answers were not up to that mark he gets convinced. So, overall I failed to give him a expression of my valuablity for the post.
Preparation
Duration: 2 months
Topics: Data Structures, System Design, Graphs, OOPS, Advance Data Structures
Tip
Tip

Tip 1 : For company like codenation you need to be great in competitive programming as the online test is very difficult to crack
Tip 2 : Focus on leetcode during final months of preparation of interview
Tip 3 : Try to have at least 3 flagship projects in at least 2 different domains

Application process
Where: Campus
Eligibility: No criteria
Resume Tip
Resume tip

Tip 1 : Keep the resume clean with good text to space ratio.
Tip 2 : Don't mention tech slacks that you have only a little knowledge about as it can backfire if the interviewer is good in that tech slack.

Interview rounds
01
Round
Hard
Online Coding Interview
Duration90 minutes
Interview date17 Aug 2020
Coding problem3

The test was from 10 pm to 11:30 pm at night, Since we had to give the test from home so it was not an uncomfortable timing for me. The test was conducted on hackerrank. Personally I find Hackerrank a better test platform than others like Amcat or Mettle.

1. Minimum Fountains
Easy
10m average time
80% success
0/40
Asked in companies
OYOUberAdobe

There is a one-dimensional garden of length 'N'. On each of the positions from 0 to 'N'...

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Try solving now
2. Count Inversions
Moderate
40m average time
55% success
0/80
Asked in companies
OracleMorgan StanleyArcesium

For a given integer array/list 'ARR' of size 'N' containing all distinct values, find the total number of 'Inversions' that may exist.

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Try solving now
Easy
15m average time
85% success
0/40
Asked in companies
Wells FargoCognizantCodenation

You are given an array 'ARR' consisting of 'N&#...

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Try solving now
02
Round
Easy
Telephonic
Duration15 minutes
Interview date19 Aug 2020
Coding problem0

The interview was at 12 noon.
This was a Resume walk-through round. The interview was supposed to be a Google Meet call but due to a weak internet connection on the interviewer's end, he called me directly on my number. He had my Resume open and he asked me to give him a walk-through of the projects I had made. His main interest was in my web development project. Since the project was live, he was able to use it and was quite impressed by my work. He also discussed my tech stack and asked a few questions related to Javascript to check my proficiency. The questions he asked were like to explain Asynchronous Programming in Javascript, Promises in Javascript, and others.

03
Round
Hard
Video Call
Duration90 minutes
Interview date21 Aug 2020
Coding problem2

This interview was at 10 am in the morning and was taken by an SDE 3 of the company who had a very great background in Competitive Coding.
The interview started with me introducing myself. The interviewer then gave me a google doc that had 2 coding questions written. He asked me to go through the first question and explain the approach. After which he asked me to code the solution as well. The same procedure was followed for the second question. The most difficult part in using Google Doc to write code is that it doesn't have automatic indentation like the code editors, so I had to put much effort in keeping my code readable.

1. Count distinct Bitwise OR of all subarrays
Easy
10m average time
90% success
0/40
Asked in companies
GoogleOYOOla

You are given an array consisting of N positive integers, your task is to count the number of distinct possible values that can be obtained by taking the bitwise OR o...

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Problem approach

I had read this article few days before the interview so I was aware of the approach that was efficient. But I started by explaining the naive O(N^3) solution.
The interviewer asked me to optimize the approach.
Then I gave him the approach I read in the article.
The interviewer asked me to code the solution which I did.

Try solving now
2. Colour the Graph
Moderate
20m average time
80% success
0/80
Asked in companies
Hexaware TechnologiesArcesiumShareChat

You are given a graph with 'N' vertices numbered from '1' to 'N' and 'M' edges. You have to colour this graph in two different colours, say blue a...

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Try solving now
04
Round
Hard
HR Round
Duration60 minutes
Interview date21 Aug 2020
Coding problem1

The round was at 4 pm evening. This round was taken by one of the Vice President of the company, this made me anxious from the very beginning.
The interviewer was a knowledgeable man and had great knowledge in every field. He always demanded exact answers.
 

1. Basic HR Question

Introduce yourself.

Why do you want to join us?

Tell me about your projects.

Problem approach

Tip 1:Do not mention skills that you don't have much idea about.
Tip 2:Try to be exact with your answers and don't beat around the bush.

Tip 3: Do not ignore system design if you are aiming at good product based companies.

Join the Discussion
1 reply
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1 Aug 2022

Why they reject you according to you?

 

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