GO Packages and Modules

Question 1

What file defines a Go module and its dependencies?

Accepted Answer

go.mod

Answer

`go.mod` declares the module path, Go version, and required dependencies; `go.sum` contains cryptographic hashes to verify downloads.

Question 2

What command adds a missing dependency to `go.mod`?

Accepted Answer

go get

Answer

`go get <module>` downloads the module, adds it to `go.mod`, and updates `go.sum`.

Question 3

What does `go mod tidy` do?

Accepted Answer

Removes unused dependencies and adds missing ones in go.mod

Answer

`go mod tidy` adds any missing module requirements and removes unused ones, keeping `go.mod` and `go.sum` consistent with the source code.

Question 4

What naming convention determines if a Go identifier is exported from a package?

Accepted Answer

Start the name with an uppercase letter

Answer

In Go, identifiers starting with an uppercase letter are exported (public), while lowercase identifiers are unexported (package-private).

Question 5

What is the `internal` package convention in Go?

Accepted Answer

Code in an `internal` directory can only be imported by code in its parent tree

Answer

The `internal` directory restriction prevents external packages from importing its contents; only packages rooted at the parent of `internal` may import it.

GO - Golang Online Test Practice Test

GO - Golang Online Test Practice Test

GO Packages and Modules