Upstox Sde1 Interview Questions and Answers

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

Q1. What are the fundamental concepts of JavaScript that were discussed during the interview?
Ans. 
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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Q1. Strength and weakness
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Q1. Private equity waterfall
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I was asked two DSA questions and duration was of one hour.
1. Calculate Sum of edges of LinkedList
2. Given a list of numbers, find out all the pythagorean triplets.

This was also a DSA round for 1 hour and expected to solve two problems (Medium)

This was a system design round for one hour

Q1. Explain the last technically challenging topic that you have worked on. The engineering manager is only interested in self boasting. Without even trying to understand the entire problem statement, they try...read more
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1 hr
3 questions Easy - Medium

Q1. Design payment gateway SDK
Ans. 
Designing a payment gateway SDK involves creating a software development kit that allows developers to easily integrate payment processing into their Android applications.
• Define the API methods for processing payments, such as authorize, capture, refund, and void.

• Implement secure communication protocols, such as HTTPS, to ensure data privacy and security.

• Include error handling mechanisms to handle various payment proce...read more
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