Scala & Spark-Master Big Data with Scala and Spark - Stack Attributes

This video tutorial explains the basic functions of a stack, including top, pop, size, and isEmpty. It demonstrates how to implement these functions using an integer stack, showing how to check the top element, pop elements, determine the stack size, and check if the stack is empty. The tutorial provides a practical example to illustrate these concepts and concludes with a brief overview of the stack operations.

What does the 'top' function do in a stack?

• Removes the top element

• Adds a new element to the stack

• Returns the top element without removing it

• Checks if the stack is empty

Which function would you use to find out how many elements are in a stack?

• pop

• top

• isEmpty

• size

In the IDE demonstration, what is the initial set of data added to the stack?

• 5, 4, 3, 2, 1

• 10, 20, 30, 40, 50

• 1, 2, 3, 4, 5

• A, B, C, D, E

What happens when the 'pop' function is called on a stack?

• It adds a new element to the stack

• It returns and removes the top element

• It checks if the stack is empty

• It returns the number of elements in the stack

After performing a 'pop' operation, what will the 'top' function return?

• The same element as before

• The number of elements in the stack

• The next element in the stack

• An error message

How does the 'isEmpty' function behave when the stack has elements?

• Adds a new element

• Throws an error

• Returns false

• Returns true

What is the purpose of the 'isEmpty' function in stack operations?

• To return the top element

• To check if the stack is empty

• To remove the top element

• To add elements to the stack