What is the output of given code below?

def addInt( a:Int = 5, b:Int = 7 ) : Int = a + b print(addInt(3,7),addInt(3),addInt(),addInt(b=5))

For the code below, Choose the correct statement that describes an issue with the code?

Output of following code?

How to groupBy using multiple columns in Scala collections?

Choose correct output using the code?

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

In Scala everything is an Object, No ___?

Best description for the variance expression as following?

Which one is false about Futures and Promises?

For the type heirachy defined below, Choose the most correct statement below for the output?

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