Scala & Spark-Master Big Data with Scala and Spark - Overview of Stack

The video tutorial introduces the concept of stacks, a data structure following the Last In, First Out (LIFO) principle. It explains stack operations with examples, demonstrating how elements are added and removed. The tutorial also covers the differences between mutable and immutable stacks in Scala, providing syntax examples for creating stacks. The video concludes with a brief overview of the stack's basic structure and functionality.

What principle does a stack follow?

• First In, First Out

• Last In, First Out

• First In, Last Out

• Random Access

In a stack, where can you add or remove elements?

• Anywhere

• Only at the top

• In the middle

• At the bottom

What types of stacks does Scala support?

• Neither mutable nor immutable

• Both mutable and immutable

• Immutable only

• Mutable only

How do you declare a stack in Scala?

• Using 'val stack = new Stack()'

• Using 'stack = new Stack()'

• Using 'varx = stack'

• Using 'var stack = Stack()'

What should you do if you don't have data to populate a stack at the time of declaration?

• Leave it empty

• Initialize with zero

• Specify the type

• Use a default value