RELQ Technologies LLC Interview Questions and Answers

System design for Splitwise

• Splitwise is a bill splitting app that allows users to split expenses with friends and family

• The system should allow users to create groups and add members to the group

• Users should be able to add expenses and split them equally or unequally among group members

• The system should keep track of each user's balance and settle debts between users

• The system should have a user-friendly interface and ensure data privacy and security

Call, apply, and bind are methods in JavaScript used to manipulate the context of a function.

• Call: Invokes a function with a specified 'this' value and arguments provided individually.

• Apply: Invokes a function with a specified 'this' value and arguments provided as an array.

• Bind: Creates a new function that, when called, has its 'this' keyword set to a specific value.

Closures are functions that have access to variables from their containing scope even after the scope has closed.

• Closures allow functions to access variables from their outer function even after the outer function has finished executing.

• They are commonly used in event handlers, callbacks, and asynchronous programming.

• Closures help in maintaining state in functional programming.

The total compensation structure includes base salary, commission, bonuses, and benefits.

• Base salary is the fixed amount paid regularly, usually monthly.

• Commission is a percentage of sales revenue earned by the salesperson.

• Bonuses are additional payments based on performance or achieving targets.

• Benefits can include health insurance, retirement plans, and other perks.

• Total comp structure may vary based on company policies and industry norms.

Design an API for buying books

• Create endpoints for browsing books, adding to cart, and making payment

• Include authentication and authorization for secure transactions

• Implement search and filtering functionalities for easy book selection

• Provide endpoints for managing user profiles and order history