What are the trade-offs of microservices vs a monolith?

Question

Accepted Answer

# Monolith vs. Microservices: Trade-offs and How to Decide

**Target Audience:** Junior & Senior Software Engineers preparing for System Design Interviews — no prior system design knowledge assumed.
**Difficulty:** Easy to Medium

> **How to read this doc:** Every concept is explained in plain language first. Right after, you'll see a callout like `📌 Interview term:` — that's the exact vocabulary a senior engineer would use for the same idea.
>
> *Note: this question is sometimes phrased as "when would you choose microservices over a monolith," "what's a modular monolith," or "walk me through the Prime Video microservices story" — all covered below, since they're really the same underlying question asked a few different ways.*

## 1. Why This Even Matters — A Simple Picture First

Imagine two ways to house a growing company. Option one: one big building — everyone shares the same walls, the same electricity meter, the same front door. Simple to manage, but if you want to renovate the

What are the trade-offs of microservices vs a monolith?

Understand the problem

Attempt it yourself

Study the solution

Monolith vs. Microservices: Trade-offs and How to Decide

Solution ready — 2 min read

Join the discussion

Discussion (0)

KEEP THE
STREAK ALIVE.

Understand the problem

Attempt it yourself

Study the solution

Monolith vs. Microservices: Trade-offs and How to Decide

Solution ready — 2 min read

Join the discussion

Discussion (0)

KEEP THESTREAK ALIVE.

KEEP THE
STREAK ALIVE.