Design an Elevator System

A controller runs a building's elevators: people call a car from a floor with an up or down button, choose a floor inside the car, and the controller decides which car answers and where each car goes next. One building, several cars, and time that moves in steps — in each step a car moves one floor, stops at one, or waits.

How the round runs

Medium · 5 stages · 5 questions · 60 min

~6 min

Requirements Gathering

lists

~3 min

Identifying Core Entities

cards

~13 min

Designing Classes & Relationships

diagram

~27 min

Code Implementation

code

~11 min

Deep Dives

code

Set up your round

Level

Interviewer

Duration

Junior · Standard · 60 min