Questions

  1. Which type constraints can you name?
  2. What implicit type constraints are added to a type if there are no type constraints defined on it by the developer?
  3. Which operators can be used to refer to the nested type of some type?
  4. Which type can be used as an infix type?
  5. Why is the use of structural types discouraged in Scala?
  6. What is expressed via variance?
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