Scala & Spark-Master Big Data with Scala and Spark - Add Data in ListBuffer

The video tutorial explains how to append and prepend data in a list buffer. It demonstrates creating a list buffer, adding items to the end using the append method, and adding items to the start using the prepend method. The tutorial highlights the mutability of list buffers, allowing direct manipulation without creating new variables. The video concludes with a summary of the operations and a preview of the next topic, which will cover data removal from list buffers.

What is the primary function of the append method in a list buffer?

• To sort the items in the list buffer

• To add an item at the end of the list buffer

• To remove an item from the list buffer

• To add an item at the beginning of the list buffer

In the demonstration, what number is appended to the list buffer containing 1, 2, and 3?

• 0

• 5

• 4

• 6

What is the result of prepending 0 to the list buffer that already contains 1, 2, 3, and 4?

• 0, 1, 2, 3, 4

• 1, 0, 2, 3, 4

• 1, 2, 3, 4, 0

• 4, 3, 2, 1, 0

What characteristic of list buffers allows them to be modified directly?

• They are static

• They are immutable

• They are dynamic

• They are mutable

How does the prepend method affect the position of a new item in a list buffer?

• It removes the first item

• It adds the item at the end

• It adds the item at the beginning

• It replaces the last item