Design Reliable Software Updates for a Mars Rover System Design Interview

1. Problem Statement

2. Architecture Discussion Map

Use this as one discussion aid, not a single correct answer. Your design should follow from the requirements, scale, and trade-offs you establish.

graph LR
    A["Design Reliable Software Updates for a Mars Rover"]
    A --> F1["Push versus pull transfer control"]
    A --> F2["Chunking, retries, and checkpoints"]
    A --> F3["Checksums and artifact verification"]
    A --> F4["Bandwidth scheduling and prioritization"]
    A --> F5["Atomic activation and rollback"]

3. Key Focus Areas

• 1
  Push versus pull transfer control
• 2
  Chunking, retries, and checkpoints
• 3
  Checksums and artifact verification
• 4
  Bandwidth scheduling and prioritization
• 5
  Atomic activation and rollback

4. What Strong Candidates Should Demonstrate

• ✓Design resumable transfer over long-delay, failure-prone communication.
• ✓Verify every chunk and the complete artifact before activation.
• ✓Provide rollback and recovery when the remote device cannot be serviced.