Airtel interview experience Real time questions & tips from candidates to crack your interview
SDE - Intern
Airtel
2 rounds | 4 Coding
problems
Selected Interview preparation journey
Journey
My journey to where I am today has been straightforward. I started learning coding concepts from YouTube, but it did not satisfy me. So, I purchased some online courses from Coding Ninjas. I learned DSA from the Coding Ninjas course, and it was great. I also learned development skills from an online course on another platform.
Application story
Airtel came to our college to hire fresh candidates for the post of SDE-1 and interns. As I was in my third year, I was desperate to get a placement as an intern, and the preparations were already underway. I took part in this hiring drive by Airtel, and finally, I got placed.
Why selected/rejected for the role?
I think I was selected because I was able to build the optimal solution for the coding questions asked in the interviews. Moreover, I also practiced good communication skills, and thankfully, I was able to overcome my nervousness and confidently pass the interview rounds.
Preparation
Duration: 2 months
Topics: Data Structures and Algorithms, Database Management Systems, Operating Systems, Networking, Aptitude, revised each and every project on my CV well, and researched some company archives on GeeksForGeeks.
Try to be who you actually are in interviews, and don’t try to be over-smart in front of the interviewer, as they know more than you; that’s why they are taking your interview. Also, prepare for Data Structures and Algorithms, and theoretical subjects like Database Management Systems and Object-Oriented Programming, as they are part of many interview questions. I prepared for these using Coding Ninjas notes, which were amazing, easy to understand, and covered almost every topic.
Application process
Where: Campus
Eligibility: 6
Focus on key projects (major ones) and key courses (such as Data Structures and Algorithms at Coding Ninjas, Certified Ethical Hacker certification, etc.), as they differentiate you from the rest. Just keep applying; off-campus opportunities sometimes take time. So don't worry, it will surely get noticed after some time. Due to my patience, I received two offers off-campus from major companies.
Interview rounds
01
Round
Medium
Online Coding Test
Duration70 mins
Interview date2 Mar 2023
Coding problem2
This round consisted of two coding questions. One was related to binary tree and other was of circular linked list.
1. Find Node
Moderate
25m average time
70% success
0/80
Asked in companies
You are given a linked list with a cycle. You need to find and return the Nth node from where the cycle starts in the input Linked List (moving towards the head of the linked list).
The cycle is created by connecting the last element of Linked List (i.e., tail) to some other node given in input.
Return null if no such part exists.
The counting of nodes starts from 1.
For Example:
head = [5 , 4 , 0 , -1]
pos = 2
N = 1
You have to find the node where the cycle begins and return the Nth node from that point in the direction of the head.
Problem approach
Implemented this question in java through recursion, also do handle corner cases like if the tree root is NULL or element is not present in tree.
2. Deletion In Circular Linked List
Easy
30m average time
0/40
Asked in companies
You are given a Circular Linked List of integers, and an integer, 'key'.
You have to write a function that finds the given key in the list and deletes it. If no such key is present, then the list remains unchanged.
For Example :
This is a visualization of the Circular Linked List, represented by:
1 2 3 4 5 -1
Note :
The Circular Linked List before/after deletion may happen to be empty. In that case, only print -1.
All integers in the list are unique.
Problem approach
Just used basic linked list deletion by taking care of each and every case.
02
Round
Easy
HR Round
Duration30 mins
Interview date2 Mar 2023
Coding problem2
This was the HR round, and the interviewer asked me basic questions related to hobbies, interests, and other things.
1. HR Question
Where did you live and tell me your interested areas?
Problem approach
I simply told him everything related to my interests, and always try to speak the truth as most of the time if you are lying, the interviewer will catch that.
2. HR Question
Are you happy with the salary breakup?
Problem approach
I said “ yes ” because the salary was one of the part through which I got attracted to this company.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
What is recursion?
Choose another skill to practice
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