When Extractor object is using the match statement, the unapply method will be __ executed.

Which one is not valid in Scala?

Often a module is too large to fit comfortably into a single file. When that happens, you can use traits to split a module into separate files. Which one is described by the above statement?

Which one describes using Scala class that is defined in a package object from Java?

Correct statements that describe a Scala Case class?

Scala is ................ with Java. The two languages are interoperable with each other.

Which of these are NOT ways in which case classes differ from standard classes?

Which predicate tests whether x is object identical to y?

Are parenthesis `(` and curly braces `{` interchangeable?

What is a lazy var?

What would be returned by the following function: def foo(l:List[Int]) = { var x=l.head; l.collect{ case a:Int if a>x => x=a; a }; x } When passed: List(2,4,6,8,6,3,1)