Elixir quiz

Test your Elixir knowledge with a free interactive quiz — 20 questions with answers and explanations. No signup needed to play.

What is GenServer in Elixir/OTP?

1. What is GenServer in Elixir/OTP?
2. What does it mean that Elixir data structures (like lists, tuples, and maps) are immutable by default?
3. What is a "mix" task in Elixir, and what is Mix used for generally?
4. What is "pattern matching" in Elixir, and how is it used beyond simple variable assignment?
5. What is Phoenix, and how does it relate to Elixir?
6. What does the `{:ok, result}` / `{:error, reason}` tuple convention commonly seen in Elixir code accomplish?
7. What is Elixir's pipe operator (`|>`) used for, e.g. `data |> Enum.map(&transform/1) |> Enum.filter(&valid?/1)`?
8. What is an Ecto "changeset," and what problem does it address?
9. What is Elixir?
10. What is Ecto, and what role does it play in a typical Elixir/Phoenix application?
11. What is the BEAM, and why does it matter that Elixir runs on it?
12. What is Phoenix LiveView, and what problem does it aim to solve?

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