How can you make a List[String] from a given val x = List[List[String]]?

Result using the following code?

Choose description that describes the Scala classes 'scala.AnyRef ' and 'scala.AnyVal'?

For given code, Choose correct statement which explains the error?

Choose the expression that allows the code to compile

Given the type hierarchy defined below, Choose correct statement below?

How can you make a List[String] from a given val x = List[List[String]]?

Which one is not valid using List?

What is the output?

The map method on List (and Seq), transforms each element of a collection based on a function. For example, if we have a List[String] and want to convert it to all lowercase?

Statement that is not correct for Scala's mutable.Map?