Scala & Spark-Master Big Data with Scala and Spark - Extra Starting Bracket Use Case

The video tutorial explains how to validate equations using a stack in Scala. It covers handling both opening and closing brackets, ensuring that for every closing bracket there is a corresponding opening bracket, and vice versa. The tutorial introduces a flag variable to mark equations as valid or invalid based on the stack's state. It provides examples to illustrate the validation process and highlights common pitfalls, such as extra brackets. The video concludes with a demonstration of the equation validator in action.

What is the primary issue that can make an equation invalid as discussed in the first section?

• Division by zero

• Extra closing bracket

• Missing multiplication sign

• Incorrect variable name

What role does the flag variable play in the equation validation process?

• It marks the equation as valid or invalid

• It stores the equation result

• It counts the number of brackets

• It tracks the position of brackets

How does the program handle a closing bracket with no matching opening bracket?

• It removes the closing bracket

• It adds a new opening bracket

• It ignores the closing bracket

• It marks the equation as invalid

What additional check is performed to ensure there are no extra opening brackets?

• Verifying the equation length

• Ensuring all brackets are of the same type

• Counting the total number of brackets

• Checking if the stack is empty at the end

What happens if there is an extra opening bracket at the end of the equation?

• The extra bracket is removed

• The equation is marked as valid

• The equation is recalculated

• The equation is marked as invalid

In the example provided, what is the outcome if the stack is not empty after processing all brackets?

• The equation is valid

• The equation is invalid

• The equation is incomplete

• The equation is ignored

What are the two conditions that must be met for an equation to be considered valid?

• All operations must be addition or subtraction

• All numbers must be even and positive

• There must be no extra closing or opening brackets

• The equation must start and end with a number