Design an Elevator System and Scheduler
Problem: Elevator System Design
Design a robust, object-oriented elevator system.
Core System Design
Define the core classes and interfaces necessary for the system, such as Elevator, Controller, Request, Floor, Button, and Sensor. Describe their interactions and responsibilities within the system.
Advanced Considerations
Your design must explicitly address:
- Concurrency: How the system handles simultaneous operations and requests.
- Fault Handling: Mechanisms to ensure system resilience and graceful degradation in case of failures.
Scheduling Algorithm
Propose a scheduling algorithm that optimizes for both travel time efficiency and fairness across all requests.
Specific Scheduling Scenario
Given a set of pending requests for floors [1, 99, 2], demonstrate how your proposed scheduler ensures that an elevator stops at floor 2 before floor 99. This demonstration must:
- Utilize only a single internal queue data structure for managing requests.
- Detail the specific queue operations required.
- Outline the tie-breaking rules applied.
- Analyze the time and space complexity of your scheduling approach for this scenario.
Scalability and Performance
Explain how your design scales effectively to manage multiple elevators and how it supports operation during peak traffic modes.
AI interview prep
Core dilemma
Balancing real-time responsiveness and optimal resource utilization (elevator movement) with fairness, fault tolerance, and scalability in a dynamic, multi-agent system.
3 tradeoffs and 3 stress tests locked
Interview prep
Unlock the interviewer X-Ray rubric, tradeoff matrix, stress tests, clarifying questions, and key concepts.
Design an Elevator System and Scheduler
Problem: Elevator System Design
Design a robust, object-oriented elevator system.
Core System Design
Define the core classes and interfaces necessary for the system, such as Elevator, Controller, Request, Floor, Button, and Sensor. Describe their interactions and responsibilities within the system.
Advanced Considerations
Your design must explicitly address:
- Concurrency: How the system handles simultaneous operations and requests.
- Fault Handling: Mechanisms to ensure system resilience and graceful degradation in case of failures.
Scheduling Algorithm
Propose a scheduling algorithm that optimizes for both travel time efficiency and fairness across all requests.
Specific Scheduling Scenario
Given a set of pending requests for floors [1, 99, 2], demonstrate how your proposed scheduler ensures that an elevator stops at floor 2 before floor 99. This demonstration must:
- Utilize only a single internal queue data structure for managing requests.
- Detail the specific queue operations required.
- Outline the tie-breaking rules applied.
- Analyze the time and space complexity of your scheduling approach for this scenario.
Scalability and Performance
Explain how your design scales effectively to manage multiple elevators and how it supports operation during peak traffic modes.