The interview process comprised 3-4 rounds, including a coding round and two distributed system design rounds. The HR explained the process clearly and sent emails with the subject matter to focus on for each round.

It was a fairly straightforward question where I was asked to design a distributed system with the following requirements:

Given two independent systems:

1. Device Inventory System: Contains device information such as device type, device OS, current user, and device status (e.g., applications installed, system status).
2. Employee Management System: Contains user, department, and organization information (e.g., user details, department details, organization details).

I needed to design a system that provides an interface (API) offering search capabilities on device and user information, like:

• Fetch all devices assigned to a user by username.
• Fetch all devices assigned to a department.

Write a program where two processes/classes communicate with each other using streams.

Process A (class) communicates with Process B (class). Process A writes JSON to standard input, and Process B responds on its own standard output.

Tip: Use StreamReader & StreamWriter.

A Public Transportation System:

Admin Functionality:

• Schedule new routes.
• ETAs.
• Vehicle locations.
• Onboarding.