10+ Wells Fargo Interview Questions and Answers

Design classes for a bidding system with new bid notifications for users who have already bid.

• Create a Bid class with attributes like bidder, amount, timestamp, etc.

• Create a Notification class with attributes like message, recipient, timestamp, etc.

• Create a BiddingSystem class to manage bids and notifications.

• Implement a method in BiddingSystem to notify users who have already bid when a new bid is placed.

• Consider using Observer design pattern to notify users efficiently.

Replace zeros surrounded by ones with ones in an array of strings

• Iterate through each string in the array

• Check for zeros surrounded by ones and replace them with ones

• Return the modified array of strings

The minimum number of jumps needed to reach the end of an array.

• Use dynamic programming to keep track of the minimum jumps needed at each index.

• At each index, calculate the maximum reachable index and update the minimum jumps accordingly.

• Example: For array [2, 3, 1, 1, 2, 4, 2, 0, 1, 1], the minimum jumps needed is 4.

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

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 optimizations for handling large user bases and transaction...read more

Design a Booking Management System for handling reservations and scheduling.

• Create a user-friendly interface for customers to make bookings

• Implement a database to store booking information

• Include features for managing availability, cancellations, and payments

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

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 monitoring and logging for better troubleshooting and mai...read more

Design LLD of google calendar

• Use microservices architecture for scalability and maintainability

• Implement features like event creation, editing, deletion, reminders, and sharing

• Utilize databases for storing user data and events

• Include user authentication and authorization for security

• Integrate with external APIs for syncing with other calendars