Scala & Spark-Master Big Data with Scala and Spark - Taking Input from User

The video tutorial explains how to take user input in Scala using the readline function, which always returns input as a string. It highlights the difference between string concatenation and integer addition, demonstrating the need to convert strings to integers for arithmetic operations. The tutorial provides a step-by-step guide on writing a program to sum two numbers entered by the user, emphasizing the importance of type conversion to avoid string concatenation. The video concludes with a summary of input handling and type conversion in Scala.

What function is used in Scala to take input from the user?

• scan

• readline

• input

• getInput

What data type does the readline function return by default?

• Integer

• Float

• String

• Boolean

What happens when you try to add a number to a string in Scala?

• It converts the string to a number

• It concatenates the number to the string

• It performs arithmetic addition

• It throws an error

What is the result of concatenating the strings '12' and '34'?

• 1234

• 46

• 34

• 12

How can you convert a string to an integer in Scala?

• Using the toInt method

• Using the parseInt function

• Using the cast method

• Using the convert function

Why is it necessary to convert string inputs to integers for arithmetic operations?

• To improve performance

• To perform numerical calculations

• To enable concatenation

• To avoid syntax errors

What is the output when you sum the integers 2 and 4 after converting them from strings?

• 6

• 42

• 24

• 8