Mono-repo vs multi-repo in Microservices - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

Advantages of Mono-repo in Microservices

Which of the following is a key advantage of using a mono-repo for managing microservices codebases?

A Simplifies dependency management by having all services in one repository

B Enables independent versioning of each microservice without affecting others

C Reduces the risk of merge conflicts by isolating code changes in separate repos

D Allows teams to use different version control systems for each microservice

💡 Hint

Think about how having all code in one place affects dependencies.

Mono-repos centralize all microservices code, making it easier to manage shared dependencies and perform coordinated changes.

❓ Architecture

intermediate

Impact of Multi-repo on Deployment Pipelines

How does using a multi-repo approach affect deployment pipelines for microservices?

A All microservices must be deployed together in a single pipeline

B Each microservice can have its own independent deployment pipeline

C Deployment pipelines become simpler because all code is in one place

D It forces teams to use a single deployment tool for all services

💡 Hint

Consider how separate repositories influence deployment independence.

Multi-repo allows each microservice to have its own pipeline, enabling independent deployment and faster releases.

❓ tradeoff

advanced

Tradeoff Between Code Sharing and Autonomy

Which statement best describes a tradeoff when choosing between mono-repo and multi-repo for microservices?

A Multi-repo improves code sharing and team autonomy simultaneously without drawbacks

B Mono-repo increases team autonomy but makes code sharing impossible; multi-repo centralizes code sharing

C Mono-repo improves code sharing but reduces team autonomy; multi-repo increases autonomy but complicates sharing

D Mono-repo and multi-repo both provide equal code sharing and autonomy without tradeoffs

💡 Hint

Think about how repository structure affects collaboration and independence.

Mono-repo centralizes code making sharing easier but can limit independent team workflows. Multi-repo allows teams to work independently but sharing code requires extra effort.

❓ scaling

advanced

Scaling Challenges with Mono-repo

What is a common scaling challenge when using a mono-repo for a large microservices architecture?

A Build times increase significantly as the repository grows larger

B It becomes impossible to share code between services

C Teams cannot coordinate changes across services

D Version control systems do not support mono-repos

💡 Hint

Consider how repository size affects build and test processes.

Large mono-repos can lead to longer build and test times, requiring advanced tooling to maintain efficiency.

❓ estimation

expert

Estimating Repository Management Overhead

Given a microservices system with 50 services, each updated weekly, estimate which repository strategy likely requires more overhead for managing pull requests and why.

A Multi-repo, because it centralizes all code making pull requests simpler

B Multi-repo, because managing many repositories requires more coordination

C Mono-repo, because it forces independent versioning for each service

D Mono-repo, because all changes go into one place causing more merge conflicts

💡 Hint

Think about how many teams work in the same repository versus separate ones.

Mono-repos can have higher overhead due to many teams working in the same repo, increasing merge conflicts and coordination needs.