Scala quiz

Test your Scala knowledge with a free interactive quiz — 26 questions with answers and explanations. No signup needed to play.

What is the difference between `val` and `var`?

1. What is the difference between `val` and `var`?
2. What is a `trait` in Scala?
3. What is a `case class`?
4. What is string interpolation in Scala?
5. What does an immutable `List` in Scala look like to construct?
6. What is Scala's relationship to Apache Spark?
7. What is a higher-order function?
8. What is a `for` comprehension in Scala?
9. What is the difference between `map` and `flatMap`?
10. What does Scala's `match` expression do?
11. What does `map` do on a collection?
12. How do you define a function in Scala?

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