Why is back-of-the-envelope estimation useful in a system design round?
Practice this question from Quiz: System Design Round Framework, with options and an explanation.
Question
Why is back-of-the-envelope estimation useful in a system design round?
Option A
It replaces the need for architecture diagrams
Option B — Correct answer
It helps justify choices like caching, partitioning, and replication
Option C
It proves the exact production bill will be correct
Option D
It removes the need to discuss trade-offs
Explanation
It turns vague scale into concrete design decisions.