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CodeNation Software Developer Intern Interview Questions, Process, and Tips

Updated 20 Sep 2021

Top CodeNation Software Developer Intern Interview Questions and Answers

  • Q1. Minimum Fountains Activation Problem In this problem, you have a one-dimensional garden of length 'N'. Each position from 0 to 'N' has a fountain that can provide water ...read more
  • Q2. Count Distinct Bitwise OR of All Subarrays Given an array of positive integers, determine the number of distinct values obtained by applying the bitwise OR operation on ...read more
  • Q3. Count Inversions Problem Statement Given an integer array ARR of size N , your task is to find the total number of inversions that exist in the array. An inversion is de ...read more
View all 7 questions

CodeNation Software Developer Intern Interview Experiences

2 interviews found

I was interviewed before Sep 2020.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 minutes
Round difficulty - Hard

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.

  • Q1. 

    Minimum Fountains Activation Problem

    In this problem, you have a one-dimensional garden of length 'N'. Each position from 0 to 'N' has a fountain that can provide water to the garden up to a certain range...

  • Ans. 

    Find the minimum number of fountains to activate to water the entire garden.

    • Iterate through the array to find the coverage of each fountain.

    • Keep track of the farthest coverage reached by activating fountains.

    • Activate the fountain that covers the farthest distance to minimize the number of fountains activated.

  • Answered by AI
  • Q2. 

    Count Inversions Problem Statement

    Given an integer array ARR of size N, your task is to find the total number of inversions that exist in the array.

    An inversion is defined for a pair of integers in the...

  • Ans. 

    Count the total number of inversions in an integer array.

    • Iterate through the array and for each pair of elements, check if the inversion condition is met.

    • Use a nested loop to compare each pair of elements efficiently.

    • Keep a count of the inversions found and return the total count at the end.

  • Answered by AI
  • Q3. 

    Array Transformation Problem

    Given an array ARR consisting of N integers and a non-negative integer K. An operation on the array replaces each element ELE with MX - ELE, where MX is the maximum element of...

  • Ans. 

    Given an array and a non-negative integer K, perform K operations on the array by replacing each element with MX - element, where MX is the maximum element of the array.

    • Find the maximum element in the array.

    • Perform the operation on each element K times.

    • Update the array after each operation.

    • Print the transformed array elements after K operations.

  • Answered by AI
Round 2 - Video Call 

(2 Questions)

Round duration - 90 minutes
Round difficulty - Hard

This interview was at 10 am in the morning and was taken by a 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 which 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. Same procedure was followed for the second question. The most difficult part in using Google Doc to write code is that it doesn't has automatic indentation like the code editors, so I had to put much efforts in keeping my code readable.

  • Q1. 

    Count Distinct Bitwise OR of All Subarrays

    Given an array of positive integers, determine the number of distinct values obtained by applying the bitwise OR operation on all possible subarrays.

    Explanatio...

  • Ans. 

    Count distinct values obtained by applying bitwise OR operation on all possible subarrays of an array of positive integers.

    • Use a set to store distinct values obtained by bitwise OR operation on all subarrays.

    • Iterate through all subarrays efficiently to calculate distinct values.

    • Optimize the solution to handle large input sizes efficiently.

    • Handle bitwise OR operation on subarrays using bitwise operators.

    • Consider using d...

  • Answered by AI
  • Q2. 

    Graph Coloring Problem

    You are given a graph with 'N' vertices numbered from '1' to 'N' and 'M' edges. Your task is to color this graph using two colors, such as blue and red, in a way that no two adjacen...

  • Ans. 

    The task is to color a graph with two colors in a way that no two adjacent vertices share the same color.

    • Check if the graph can be colored using two colors without any adjacent vertices sharing the same color.

    • Use graph coloring algorithms like BFS or DFS to solve the problem.

    • If there are odd cycles in the graph, it is not possible to color the graph as described.

    • If the graph is bipartite, then it is possible to color t

  • Answered by AI
Round 3 - HR 

Round duration - 60 minutes
Round difficulty - Hard

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.
The round started with my resume walk through. Then came open ended questions followed by a system design question in which I failed miserably.

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from Maulana Azad National Institute of Technology, Bhopal. Eligibility criteriaNo criteriaCodenation interview preparation:Topics to prepare for the interview - Data Structures, System Design, Graphs, OOPS, Advance Data StructuresTime required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

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 resume tips for other job seekers

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.

Final outcome of the interviewRejected

Skills evaluated in this interview

I was interviewed before Sep 2020.

Round 1 - Video Call 

(2 Questions)

Round duration - 45 Minutes
Round difficulty - Medium

This was a straight coding round with three questions , I was able to solve all 3

  • Q1. 

    Kth Largest Number Problem Statement

    You are given a continuous stream of numbers, and the task is to determine the kth largest number at any moment during the stream.

    Explanation:

    A specialized data st...

  • Ans. 

    Design a data structure to find the kth largest number in a continuous stream of integers.

    • Design a specialized data structure to handle continuous stream of numbers

    • Implement add(DATA) function to add integers to the pool

    • Implement getKthLargest() function to retrieve the kth largest number

    • Maintain the pool of numbers and update it based on queries

    • Output the kth largest number for each Type 2 query

  • Answered by AI
  • Q2. 

    Rat in a Maze Problem Statement

    You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...

  • Ans. 

    Find all possible paths for a rat in a maze from source to destination.

    • Use backtracking to explore all possible paths in the maze.

    • Keep track of visited cells to avoid revisiting them.

    • Recursively try moving in all directions (up, down, left, right) until reaching the destination.

    • Add the valid path to the result list when the destination is reached.

    • Sort the result list in alphabetical order before returning.

  • Answered by AI
Round 2 - Video Call 

Round duration - 60 Minutes
Round difficulty - Medium

As this was my first system design round, I was not expecting to be able to tell anything , but to my surprize he interested in just the idea what I can think , how I can solve some issues which need not be definitely to have a solution / or multiple solutions are possible from common sense.

I was given an Idea based question

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - Intern in BangaloreEligibility criteriado pretty great in the coding testCodenation interview preparation:Topics to prepare for the interview - Dynamic Programming, Binary Search, Data Structures, Trees, GraphsTime required to prepare for the interview - 1 MonthInterview preparation tips for other job seekers

Tip 1 : Be focused on the question and keep trying, Project needs to be well understood and somewhat on your tips. 
Tip 2 : Don't code till you are sure and got a green signal about the efficiency and correctness of logic
Tip 3 : Just brush up your DS basics and some logical algorithms (Dijkstra, Shortest spanning tree , etc)

Application resume tips for other job seekers

Tip 1 : Experience must be highlighted, or the Project whichever you would like to discuss
Tip 2 : Links are always a great way to show your work (deployed/code)

Final outcome of the interviewSelected

Skills evaluated in this interview

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Interview questions from similar companies

I was interviewed before Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

  • Q1. 

    Sum of Two Numbers Represented as Arrays

    Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...

  • Ans. 

    Given two numbers represented as arrays, calculate their sum and return the result as an array.

    • Iterate through the arrays from right to left, adding digits and carrying over if necessary

    • Handle cases where one array is longer than the other by considering the remaining digits

    • Ensure the final sum array does not have any leading zeros

  • Answered by AI
Round 2 - Face to Face 

Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round 3 - HR 

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.

Interview Preparation Tips

Eligibility criteriaAbove 60 %Wipro Limited interview preparation:Topics to prepare for the interview - OOPS, Data Structures, Database Concepts, Coding problemsTime required to prepare for the interview - 2-3 monthsInterview preparation tips for other job seekers

Tip 1 : Practice atleast 2-3 Coding problems daily so your logic building becomes stronger.
Tip 2 : Exercise problems based on OOPS concepts and others too.
Tip 3 : If you can have your own project built, then it's the major point and will act as a plus point.

Application resume tips for other job seekers

Tip 1 : Your resume should be in standard form, short and simple will be more effective.
Tip 2 : Whatever you have learned, you need to mention it in your resume as that will be your primary source of selection and having project on your resume is important.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Naukri.com and was interviewed in Jul 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. SOLID principals, oops, c# basics, SQL server, azure, design pattern

Interview Preparation Tips

Interview preparation tips for other job seekers - Clear basics of oops and design pattern

I applied via Job Portal and was interviewed before Apr 2021. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Solid principles in c#
  • Ans. 

    Solid principles are a set of design principles for writing maintainable and scalable code in C#.

    • Single Responsibility Principle (SRP) - a class should have only one reason to change

    • Open/Closed Principle (OCP) - a class should be open for extension but closed for modification

    • Liskov Substitution Principle (LSP) - derived classes should be substitutable for their base classes

    • Interface Segregation Principle (ISP) - client...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - good company for freshers as well as beginners

Skills evaluated in this interview

I applied via Campus Placement and was interviewed before Feb 2020. There were 4 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Hr

Interview Preparation Tips

Interview preparation tips for other job seekers - You should be true to what you are putting before the interviewer . Try to put your ideas Add something you did well in your career like in projects /research which you know very well and versed in concepts about it for open interview so that interviewer can get bandwidth where he can ask questions from. This is simply a key .

I applied via Campus Placement and was interviewed in Dec 2020. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. 1.Describe a situation where you have taken a quick decision and failed, and a situation where you succeeded. 2. What is a skill you have tried to achieve but failed? 3. Describe a decision you have taken ...

Interview Preparation Tips

Interview preparation tips for other job seekers - 1. Always try to take risk in small problems . When you face the consequences, you would be able to tackle bigger problems.
2. Every skill you learn, even if you didn't excel in it is not to be considered a waste of time/failure, you learn something simply by participating.

Interview Questionnaire 

1 Question

  • Q1. HTML, CSS, BOOTSTRAP, PHP. SQL

I applied via Campus Placement and was interviewed before Jun 2020. There were 3 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Simple program
  • Q2. I wrote a simple program in C

Interview Preparation Tips

Interview preparation tips for other job seekers - Be bold and confident

I applied via Campus Placement and was interviewed before Jun 2020. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Tell me about Yourself, some questions related to machine learning, and I was asked more questions to differentiate like differences between ml and ai, python and c, c and java and procedural and functiona...

Interview Preparation Tips

Interview preparation tips for other job seekers - Get a complete grip on your resume and be confident about what you say, If you don't know the answer it is okay to agree that you don't know the answer so that interviewer can ask the next questions.
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