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Bharti Airtel Software Engineer Interview Questions and Answers
10 Interview questions
JavaScript prototype sorting function for arrays of strings
Use the Array.prototype.sort() method to sort an array of strings
Pass a compare function to specify the sorting order
Example: ['banana', 'apple', 'cherry'].sort((a, b) => a.localeCompare(b))
React is faster than other frameworks due to its virtual DOM, efficient diffing algorithm, and use of server-side rendering.
React uses a virtual DOM which allows it to update only the necessary components instead of re-rendering the entire page.
React's efficient diffing algorithm compares the virtual DOM with the actual DOM to minimize updates and improve performance.
React supports server-side rendering, which can...
Creating a Promise polyfill from scratch involves implementing the Promise API using callbacks and handling asynchronous operations.
Understand the Promise API and its methods (resolve, reject, then, catch)
Implement a constructor function that takes an executor function as an argument
Handle asynchronous operations using callbacks and setTimeout
Implement the then and catch methods to handle success and error cases r...
MFS in Ab Initio refers to Multi-File System, enabling efficient data management and processing across multiple files.
MFS allows parallel processing of data, improving performance.
It supports various file formats, such as CSV, XML, and flat files.
MFS can handle large volumes of data by distributing it across multiple files.
Example: In a data processing job, MFS can read from multiple input files simultaneously.
Session management is the process of securely managing user sessions in web applications.
Use cookies or tokens to track user sessions
Implement session timeout to prevent unauthorized access
Store session data securely on the server side
Use HTTPS to encrypt session data during transmission
Swap Kth Elements in an Array
Given an array ARR of size N, perform the operation to swap the Kth element from the beginning with the Kth element from the end of the array.
Example:
Input:
N = 5, K = 2
A...
Swap Kth elements in an array with given constraints.
Create a function that takes the array, K value, and size of the array as input
Swap the Kth element from the beginning with the Kth element from the end
Handle edge cases like K being out of bounds or array size being less than 2
Covid Vaccination Distribution Problem
As the Government ramps up vaccination drives to combat the second wave of Covid-19, you are tasked with helping plan an effective vaccination schedule. Your goal is ...
Given constraints and rules, maximize vaccines administered on a specific day during a vaccination drive.
Iterate through each test case and calculate the maximum number of vaccines administered on the specified day.
Distribute the available vaccines evenly across the days while adhering to the rules.
Ensure that the sum of vaccines administered does not exceed the maximum allowed.
Maximize the vaccines administered o...
N-th Fibonacci Number Problem Statement
Given an integer ‘N’, your task is to find and return the N’th Fibonacci number using matrix exponentiation.
Since the answer can be very large, return the answer m...
The task is to find the Nth Fibonacci number using matrix exponentiation and return the answer modulo 10^9 + 7.
Implement a function to find the Nth Fibonacci number using matrix exponentiation.
Return the answer modulo 10^9 + 7 to handle large values.
Use the formula F(n) = F(n-1) + F(n-2) with initial values F(1) = F(2) = 1.
Optimize the solution to achieve better than O(N) time complexity.
Consider solving the probl...
Yes, I have solved a complex Java problem on my own.
I once had to optimize a large-scale Java application by implementing multithreading to improve performance.
I successfully debugged a memory leak issue in a Java program by analyzing heap dumps and identifying the root cause.
I designed and implemented a custom data structure in Java to efficiently solve a specific problem.
The minimum number of characters needed to convert a string into a palindrome is the length of the string minus the length of the longest palindromic subsequence of the string.
Find the longest palindromic subsequence of the given string.
Subtract the length of the longest palindromic subsequence from the length of the original string to get the minimum number of characters needed to convert it into a palindrome.
Bharti Airtel Software Engineer Interview Experiences
8 interviews found
Anonymous
I applied via Recruitment Consulltant and was interviewed in Apr 2024. There were 2 interview rounds.
(3 Questions)
- Q1. JavaScript prototype sorting function
- Ans.
JavaScript prototype sorting function for arrays of strings
Use the Array.prototype.sort() method to sort an array of strings
Pass a compare function to specify the sorting order
Example: ['banana', 'apple', 'cherry'].sort((a, b) => a.localeCompare(b))
- Q2. Promise polyfill from scratch
- Ans.
Creating a Promise polyfill from scratch involves implementing the Promise API using callbacks and handling asynchronous operations.
Understand the Promise API and its methods (resolve, reject, then, catch)
Implement a constructor function that takes an executor function as an argument
Handle asynchronous operations using callbacks and setTimeout
Implement the then and catch methods to handle success and error cases respec...
- Q3. React hooks -useEffect useMemo
(2 Questions)
- Q1. Session Management in applications
- Ans.
Session management is the process of securely managing user sessions in web applications.
Use cookies or tokens to track user sessions
Implement session timeout to prevent unauthorized access
Store session data securely on the server side
Use HTTPS to encrypt session data during transmission
- Q2. Why react is fast than other frameworks
- Ans.
React is faster than other frameworks due to its virtual DOM, efficient diffing algorithm, and use of server-side rendering.
React uses a virtual DOM which allows it to update only the necessary components instead of re-rendering the entire page.
React's efficient diffing algorithm compares the virtual DOM with the actual DOM to minimize updates and improve performance.
React supports server-side rendering, which can impr...
Skills evaluated in this interview
Not remembered. It was a campus interview. Its been a 2 years.
(2 Questions)
- Q1. Tell me about your self.
- Ans.
I'm a passionate software engineer with a strong background in full-stack development and a love for solving complex problems.
Graduated with a degree in Computer Science from XYZ University.
Worked at ABC Corp, where I developed a web application that improved user engagement by 30%.
Proficient in languages like JavaScript, Python, and Java, with experience in frameworks such as React and Django.
Enjoy collaborating in ag...
- Q2. Why you want to join?
Interview Preparation Tips
Gaurav Rokade
(2 Questions)
- Q1. What is MFS in abinitio?
- Q2. What is MFS in abinitio
Skills evaluated in this interview
Selected
I applied via Approached by Company and was interviewed before Mar 2023. There were 2 interview rounds.
(3 Questions)
- Q1. All About Java & OOPS concepts
- Q2. SQL Query & Questions
- Q3. Spring Boot, Spring, Microservices Questions
(4 Questions)
- Q1. Microservices Questions
- Q2. Spring & Spring Boot Questions
- Q3. Iot Questions & Vision-Goals Question
- Q4. Communication and Checking Ability to work in Different Teams
I appeared for an interview in Jan 2022.
(1 Question)
Round duration - 40 Minutes
Round difficulty - Medium
Round 1 was mainly focused on data structures and algorithms ,core java concepts and dbms
- Q1. You are given a string. What is the minimum number of characters that need to be inserted to convert it into a palindrome?
- Ans.
The minimum number of characters needed to convert a string into a palindrome is the length of the string minus the length of the longest palindromic subsequence of the string.
Find the longest palindromic subsequence of the given string.
Subtract the length of the longest palindromic subsequence from the length of the original string to get the minimum number of characters needed to convert it into a palindrome.
Round duration - 40 to 50 min
Round difficulty - Medium
Focussed mainly on projects and system design
Round duration - 30 Minutes
Round difficulty - Medium
Managerial round
Round duration - 20 Minutes
Round difficulty - Easy
Interview Preparation Tips
Tip 1 : Make you Data Structure and algorithms , Problem solving strong ( use to do some dsa problems on code studio and leetcode daily.
Tip 2 : Practiced Quality questions and mostly asked questions list available on codestudio( used company tags and topic tags) as quality matters more than quantity of questions .
Tip 3 : Give mock interviews, this really helped me as it gives you clearity and builds confidence.
Tip 4 : Read respective company’s interview experiences available on codestudio and other websites before going to actual interview, as this gives you idea about level of interviews and you can prepare beforehand.
Tip 5 : after solving dsa problem .Try to look in discussion section too as you can get more optimised or more efficient approach used by others to solve the problem.
Tip 6 : Prepare important concepts from Operating system,DBMS,System design too as that might also be asked.
Tip 7 : Do atleast 2 quality projects.
Not a Tip But : Lot of quality content available online, whenever felt like stuck with some concepts take help from senior or colleagues ( I use to watch coding ninja shorts by parikh jain whenever felt demotivated or stuck with concepts)
Tip 1 : Have a concise resume , don't fill your resume with unnecessary details like your address, relationship status etc.
Tip 2 :Resume should not be more than 2 pages( try to make it very concise in 1 page)
Skills evaluated in this interview
I appeared for an interview in Jan 2022.
(3 Questions)
Round duration - 30 Minutes
Round difficulty - Easy
In this round, Interviewer tried to judge if my basics are clear or not.
He focused majorly on CS fundamentals.
He was pretty cooperative and gave me time after asking questions.
- Q1. Have you ever solved a complex Java problem on your own?
- Ans.
Yes, I have solved a complex Java problem on my own.
I once had to optimize a large-scale Java application by implementing multithreading to improve performance.
I successfully debugged a memory leak issue in a Java program by analyzing heap dumps and identifying the root cause.
I designed and implemented a custom data structure in Java to efficiently solve a specific problem.
- Q2.
N-th Fibonacci Number Problem Statement
Given an integer ‘N’, your task is to find and return the N’th Fibonacci number using matrix exponentiation.
Since the answer can be very large, return the answer ...
- Ans.
The task is to find the Nth Fibonacci number using matrix exponentiation and return the answer modulo 10^9 + 7.
Implement a function to find the Nth Fibonacci number using matrix exponentiation.
Return the answer modulo 10^9 + 7 to handle large values.
Use the formula F(n) = F(n-1) + F(n-2) with initial values F(1) = F(2) = 1.
Optimize the solution to achieve better than O(N) time complexity.
Consider solving the problem us...
- Q3.
Swap Kth Elements in an Array
Given an array
ARRof sizeN, perform the operation to swap the Kth element from the beginning with the Kth element from the end of the array.Example:
Input:
N = 5, K = 2
... - Ans.
Swap Kth elements in an array with given constraints.
Create a function that takes the array, K value, and size of the array as input
Swap the Kth element from the beginning with the Kth element from the end
Handle edge cases like K being out of bounds or array size being less than 2
(1 Question)
Round duration - 30 minutes
Round difficulty - Medium
It was in late evening, interviewer was quite cool and asked me quite basic things about myself.
- Q1.
Covid Vaccination Distribution Problem
As the Government ramps up vaccination drives to combat the second wave of Covid-19, you are tasked with helping plan an effective vaccination schedule. Your goal is...
- Ans.
Given constraints and rules, maximize vaccines administered on a specific day during a vaccination drive.
Iterate through each test case and calculate the maximum number of vaccines administered on the specified day.
Distribute the available vaccines evenly across the days while adhering to the rules.
Ensure that the sum of vaccines administered does not exceed the maximum allowed.
Maximize the vaccines administered on the...
Interview Preparation Tips
Tip 1 : Know your project from the core.
Tip 2 : Make your basics of CS fundamentals crystal clear.
Tip 3 : Do all must ask Dsa questions, try to achieve the goal of 5-10 questions everyday.
Tip 1 : Add your github and other problem solving sites like leetcode and codeforces on your resume. It leaves a good impact.
Tip 2 : Brief your role on the projects.
Tip 3 : Mention your achievements and skills. Again they leave a good impact.
Skills evaluated in this interview
Selected
I applied via LinkedIn and was interviewed before May 2023. There were 2 interview rounds.
I was given to solve two DS problems
I was to integrate a simple use case in android
Interview Preparation Tips
Interview Questionnaire
1 Question
- Q1. 1. difference between applicationContext and beanFactory. 2. questions related to synchronization in multi threading.
Top trending discussions
Interview questions from similar companies
I appeared for an interview before May 2016.
Interview Preparation Tips
I appeared for an interview in Mar 2017.
Interview Questionnaire
5 Questions
- Q1. Related to semiconductors, processors etc. were asked.
- Q2. Strength
- Q3. Weaknesses
- Q4. Hobbies
- Q5. If there are 200 fishes in an aquarium. 99% are red. How many fishes have to be removed to make the red fishes 98 % in the aquarium?
- Ans.
To make the red fishes 98%, 50 fishes have to be removed from the aquarium.
Calculate 1% of 200 fishes to find the number of red fishes.
Subtract the number of red fishes from 200 to find the number of non-red fishes.
Calculate 2% of the total number of fishes to find the desired number of red fishes.
Subtract the desired number of red fishes from the current number of red fishes to find the number of fishes to be removed.
Interview Preparation Tips
Experience: There were 40 aptitude questions of variable difficulty. More questions revolved around topics like time and work, distance, speed, time, profit loss, age etc.
Tips: A regular and prior preparation will go a long way in determining a good test score.
Use tricks to solve the questions and calculations should be fast.
Duration: 30 minutes
Total Questions: 40
Round: Test
Experience: The questions weren't that tough when it came to programming. An example would be conversion of temperature from Celsius to Fahrenheit and vice versa. This was a question in my paper. So I'm hoping the difficulty would be more or less the same.
Tips: Do certified programming courses. They help you a lot in cracking good jobs.
Duration: 45 minutes
Total Questions: 3
Round: Puzzle Interview
Tips: This can be tough if you can't imagine scenarios and situations. So make sure you inculcate critical problem solving thinking in your everyday life. I feel that's the best way to do things in this round.
Round: Technical Interview
Experience: This was a short interview so not much happened.
Tips: Whatever you do just know your stuff properly.
Round: HR Interview
Experience: It was a simple interview. Basic questions and their basic answers helped me get through it.
Tips: The tip would be to stay positive in your approach while answering the questions
Skills: Technical Skill, Interpersonal Communication, Aptitude
College Name: VIT Vellore
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