Choose the statement that is not correct about Scala's List?

Reason why the code fails to compile, for the type hierarchy and expressions as following?

Which are scala identifiers?

When writing the code of a Scala program, you create and interact with objects. To interact with a particular object, you can use a variable that refers to the object. You can do a variable with either a val or var, and assign an object to it. Which option is described by the above statements?

The primary tool Scala gives you to organize your programs is the class. A class is a blueprint for objects. Once you do a class, you can create objects from the class blueprint with the keyword new. Which option is described by the above statements?

Correct output of given code fragment?

For the code below choose correct statement?

Choose correct statement which solves the error when you remove the line implicit

Choose expression that shows the correct output?

Which one is true for Objects, Traits and Classes?

Which code statement is correct, Using scala object inside java?