10+ Bharti Airtel Software Engineer Interview Questions and Answers

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 using dynamic programming or matrix exponentiation technique...read more

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 specified day to meet the requirements.

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

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.

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.

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 improve initial load times by rendering the UI on the server b...read more

MFS in Abinitio stands for Multi-File System, which is a feature that allows Abinitio graphs to read/write data from multiple files simultaneously.

• MFS allows parallel processing of data from multiple files in Abinitio graphs

• It helps in improving performance by distributing the workload across multiple files

• MFS can be configured to read/write data from/to different file systems or locations

• Example: Using MFS, a graph can read data from multiple input files and write the output...read more

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))

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