Airtel Payments Bank Software Developer Interview Questions and Answers for Experienced

Explain Singleton pattern then add threading lock thing as enhancement,
usecases and implementation of LRU cache
use Java 8 stream API to filter and sort list of object

Q1. Why leaving previous organisation
Add your answer
Q2. Are you joining for salary or experience
Add your answer
Q3. Do you belive in Eko's vision
Add your answer

Q1. Asp .net Oops concept
Add your answer

2 coding questions .array or string helpful

Q1. Sql basic question and answer
Add your answer
Q2. Sql all answers
Add your answer

Finding possible options of moving horse in chess board

Write the polyfill of bind (custom bind)

Leetcode medium 2 question in 60 minutes.

Leet code hard 1 question

Q1. Design a hashmap and internal working .. then few questions on linked hashmap
Add your answer
Q2. Assignment to make a snake and ladder
Add your answer

Coding round consisted of three problems with easy to moderate level difficulty.

Q1. Variation of Minimum number of platforms required for railway station.
Ans. 
Minimum number of platforms required for a railway station depends on the maximum number of trains arriving and departing at the same time.
• Calculate the maximum number of trains arriving and departing at the same time.

• Determine the time intervals for each train's arrival and departure.

• Add extra platforms for buffer and unexpected delays.

• Consider factors like train length, frequency, and scheduling conflicts.

• Example: If...read more
Answered by AI
Add your answer
Q2. Rearrange the array such that the negative numbers are shifted to the beginning.
Ans. 
Rearrange array with negative numbers at the beginning
• Iterate through the array and move negative numbers to the beginning

• Use two pointers approach to swap elements

• Maintain the order of negative numbers while shifting them to the beginning
Answered by AI
Add your answer

Q1. Implement a simple program using multithreading.
Ans. 
A simple program using multithreading can be implemented to demonstrate parallel execution of tasks.
• Create a class that implements the Runnable interface in Java.

• Override the run() method to define the task that will run in a separate thread.

• Create instances of the class and start them using the Thread class.

• Use synchronization mechanisms like locks or semaphores to manage shared resources in a thread-safe manner.
Answered by AI
Add your answer
Q2. Explain in details about the Java Collections API.
Ans. 
Java Collections API provides a set of classes and interfaces to store and manipulate collections of objects.
• Includes interfaces like List, Set, and Map for different types of collections

• Provides classes like ArrayList, HashSet, and HashMap for implementing collections

• Offers utility classes like Collections for common operations on collections

• Introduced in Java 2 and has been expanded in subsequent versions
Answered by AI
Add your answer

3 Coding problems to be solved in 90 minutes.

Q1. Introduction, Project Discussion, HTML Tags, Reverse a string, Level order traversal in a binary tree, Minimum swap operations to sort an array.
Add your answer

Q1. N-Queen problem, Coin Change, Number of Islands
Add your answer