Angel One Senior Software Engineer Interview Questions and Answers

Q1. Js based question on event loop
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Q1. Question on Fundamentals of React and Javascript
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Q2. Coding question on React Native
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Q1. What are the fundamental concepts of JavaScript that were discussed during the interview?
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Fundamental concepts of JavaScript discussed in the interview
• Data types in JavaScript (string, number, boolean, object, array)

• Functions and scope in JavaScript

• DOM manipulation and event handling

• Asynchronous programming with callbacks, promises, and async/await

• Object-oriented programming concepts in JavaScript
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Two DSA Questions
1. Check whether two strings are anagram or not?
2. Create power function without using Math.pow() library?

Design dream11. Bonus - how notification will be sent to customer for milestone of a player they have followed at scale.

Q1. LLD to design whatsapp
Ans. 
Designing WhatsApp involves creating a high-level design for the messaging app, focusing on features like chat, groups, calls, and media sharing.
• Implement chat functionality with real-time messaging using sockets

• Design group chat feature with ability to add/remove members

• Include end-to-end encryption for secure messaging

• Develop voice and video calling functionality

• Allow media sharing such as photos, videos, and documen
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Q2. System design ticket booking system
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Design a ticket booking system for efficient and user-friendly experience.
• Use a database to store information about available tickets, users, and bookings

• Implement a user-friendly interface for users to search for and book tickets

• Include features like seat selection, payment processing, and booking confirmation

• Consider scalability and performance to handle a large number of users and bookings
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Q1. Explain OOPS Concept ?
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OOPS (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.
• OOPS focuses on creating objects that interact with each other to solve problems.

• It involves concepts like classes, objects, inheritance, polymorphism, and encapsulation.

• For example, a class 'Car' can have objects like 'Toyota', 'Honda', etc., each with their own properties and methods.

• Inheritan...read more
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