Scala provides __ versions of all of its collection types. These versions cannot be changed after they are initialized. You should use them whenever you know a collection should not be changed, so that you do not accidentally change it later?

In which case there is only a small speed penalty?

If Seq is a trait then why is var x = Seq(1, 2, 3) legal?

Statement that is not correct for parallel collections?

Choose the correct statement which shows the output?

Statement that is not correct using the code below?

For the code below, which statement is True?

Which one is false about Monads?

What's the output?

Which statement is false for traits?

Which one is not reserved word in Scala?