Answer
Vertical scaling increases machine power; horizontal scaling adds more instances. Node typically scales horizontally.
Quick Answer
Vertical scaling: add more CPU/RAM to the server — limited by hardware ceiling. Horizontal scaling: add more Node.js instances behind a load balancer — scales nearly linearly and is cheaper. Node.js is designed for horizontal scaling — keep instances stateless (sessions in Redis), use a load balancer, and scale out to handle traffic growth.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
Want to bookmark, take notes, or join discussions?
Sign in to access all features and personalize your learning experience.
Source: SugharaIQ