Help come up with questions for a friend about his work so he doesn't fail the final?

To help a friend prepare for a final interview on Go, you can suggest the following questions:

1. How is memory management structured in Go? What is a garbage collector and how does it work?
2. Explain the difference between goroutine and OS thread. How is goroutine scheduling handled?
3. What are channels and how are they used for synchronization?
4. How to implement concurrent access to data? Tell about mutex and other synchronization primitives.
5. What are the ways to handle errors in Go? How to properly use panic and recover?
6. How is the interface structured in Go? How does it differ from interfaces in other languages?
7. Tell about contexts and their use in managing the lifetime of operations.
8. How are Go applications built and deployed?

Example question with code:

func main() {
    ch := make(chan int)
    go func() {
        ch <- 42
    }()
    fmt.Println(<-ch)
}

• Explain how this code works and what will happen when it is executed.

These questions will help assess deep understanding of the language and practical skills.