Go modules overview - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Go module?

A Go module is a collection of Go packages stored in a file tree with a go.mod file at its root. It defines the module's path and its dependency requirements.

beginner

What is the purpose of the go.mod file?

The go.mod file declares the module's path and lists the specific versions of dependencies the module requires. It helps Go manage dependencies consistently.

beginner

How do you create a new Go module?

You create a new Go module by running the command go mod init <module-path> in your project folder. This creates a go.mod file.

intermediate

What command updates dependencies in a Go module?

The command go get updates or adds dependencies in your module. It modifies go.mod and downloads the needed versions.

intermediate

Why are Go modules important compared to GOPATH?

Go modules allow versioning and better dependency management outside GOPATH. They make projects reproducible and easier to share.

Which file defines a Go module's dependencies?

A main.go

B go.mod

C go.sum

D module.go

The go.mod file lists the module path and its dependencies.

What command initializes a new Go module?

A go run

B go get <package>

C go build

D go mod init <module-path>

The 'go mod init' command creates a new go.mod file for your module.

What does the go.sum file do?

A Stores checksums to verify module integrity

B Lists all Go source files

C Defines module path

D Specifies Go version

go.sum contains cryptographic hashes to ensure dependencies are not tampered with.

How do Go modules improve dependency management?

A By storing all code in GOPATH

B By removing the need for imports

C By allowing versioning and reproducible builds

D By compiling faster

Modules track versions and ensure consistent builds across environments.

Which command updates dependencies in a Go module?

A go get

B go mod tidy

C go build

D go clean

The 'go get' command adds or updates dependencies in go.mod.

Explain what a Go module is and why it is useful.

Think about how Go modules help organize and manage code and dependencies.

Describe the steps to create and manage dependencies in a Go module.

Consider the commands and files involved in starting and maintaining a module.