Apache Spark Certification Practice Test

Question: 1 / 400

In Scala, how do you create a collection?

Val foo = list(1,2,3)

Creating a collection in Scala involves using the appropriate constructors and syntax for collection types such as lists, arrays, or other data structures. The correct option utilizes the `list` keyword, which should actually be `List` (with an uppercase "L") when referring to the List collection in Scala.

In Scala, a `List` is a linear sequence that is immutable, meaning that once it's created, elements cannot be added or removed. The syntax to create a List is straightforward: you can simply call `List` and pass the desired elements as parameters.

The choice involving `array` is not the standard way to define an array in Scala since it should be created using the `Array` constructor, requiring the use of the `Array.apply` method or the `Array` keyword. Additionally, the creation of a collection using `new Collection` is incorrect due to the fact that there's no collection called `Collection` in Scala. Scala collections are part of the `scala.collection` package, and you would typically use either a built-in collection type or create your own collection by extending the existing collections traits.

Lastly, in Scala, the correct syntax for creating lists does not use square brackets for initialization; this syntax is typical in other languages

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Val foo = array(1,2,3)

Var foo = new Collection(1,2,3)

List foo = [1,2,3]

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