RedDoorz Senior Software Engineer Interview Questions and Answers

DSA, 1 hour with 2 LC medium questions

Q1. Low level design
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Q2. Design lld for Dream 11
Ans. 
Designing the low-level design for Dream 11 platform.
• Use microservices architecture for scalability and flexibility.

• Implement a robust database schema to handle large amounts of user data.

• Utilize caching mechanisms to improve performance, especially during peak usage times.

• Include authentication and authorization mechanisms to ensure data security.

• Design APIs for seamless integration with third-party services.

• Implement...read more
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Q1. High level design
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Q2. Design HLD for rider management system
Ans. 
Design HLD for rider management system
• Use microservices architecture for scalability and flexibility

• Implement user authentication and authorization for security

• Include features like ride tracking, payment processing, and feedback system

• Utilize databases for storing rider information and ride history
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Two medium DSA questions based on strings.

Q1. Design Google Meet
Ans. 
Design a video conferencing platform similar to Google Meet.
• Implement real-time video and audio streaming

• Include features like screen sharing, chat, and participant management

• Ensure scalability to support large number of users

• Focus on security and privacy measures

• Optimize for low latency and high quality video/audio
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Q1. Low Level Design for Chess
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Low level design for a chess game including classes, functions, and data structures.
• Create classes for pieces (e.g. Pawn, Rook, Bishop) with properties like position and color

• Implement functions for moving pieces, checking valid moves, and capturing opponent pieces

• Use data structures like 2D arrays to represent the chess board and track piece positions
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Q1. Design Splitwise Application (LLD)
Ans. 
Design a Splitwise application for managing shared expenses among friends.
• Implement user authentication and authorization for secure access.

• Create a user-friendly interface for adding expenses and splitting them among friends.

• Develop algorithms for calculating balances and settling debts between users.

• Include features for adding comments, attaching receipts, and generating reports.

• Consider scalability and performance o...read more
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Q1. Basic java 8 concepts
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Q2. Basic spring boot questions
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Q1. Project discussion and basic java spring technical questions
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Q1. Asked about my technical expertise
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Q2. Scenario based question
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Q1. Create a controller , service and repository methods and classes to save userDeatils in table using Spring Data JPA .
Ans. 
Create a controller, service, and repository to save user details using Spring Data JPA.
• Create a UserController class with appropriate mappings for saving user details.

• Create a UserService class with a method to save user details.

• Create a UserRepository interface that extends JpaRepository to handle database operations.

• Implement the saveUserDetails method in the UserService class to call the save method of the UserRepo...read more
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Q1. Fundamentals and Basics of android, projects you are worked on.
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It was sort of pair programming where you will be told to implement some feature. Here they check your coding style, your approach and the architecture you follow.

Q1. Advanced android questions were asked and some scenario based questions.
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Q1. It was managerial round, most discussion were on my projects and past experience.
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