Question 1

What is the difference between vertical and horizontal scaling?

Accepted Answer

Vertical scaling (scaling up) means increasing the resources of a single server, like adding more CPU or RAM. Horizontal scaling (scaling out) means adding more servers to your pool of resources to distribute the load.

Question 2

What is a load balancer and why is it used?

Accepted Answer

A load balancer is a device or software that distributes network or application traffic across multiple servers. It is used to improve the availability and reliability of applications by ensuring no single server becomes a bottleneck.

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