Go quiz

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How do you pause until a channel receives a value?

1. How do you pause until a channel receives a value?
2. How are exported identifiers marked in Go?
3. Which built-in adds an element to a slice?
4. How do you check whether a key exists in a map?
5. What is the zero value of a `bool`?
6. What is the difference between an array and a slice in Go?
7. What does `defer file.Close()` placed right after `file, _ := os.Open(...)` do?
8. What does this print: `s := "héllo"; fmt.Println(len(s))`?
9. Which built-in returns the capacity (not length) of a slice?
10. Which idiomatic pattern returns errors from a function?
11. What does the `:=` blank identifier `_` do?
12. What does this compute: `len([]int{1, 2, 3, 4})`?

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