Which of the following 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.

Choose the correct statement that describes an 'abstract sealed' class?

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)

`() => Unit` is best described as