You have created a class that should be visible only to the other code in its module. Which modifier do you use?

Kotlin has two equality operators, == and ===. What is the difference?

Which snippet correctly shows setting the variable max to whichever variable holds the greatest value, a or b, using idiomatic Kotlin?

You have an enum class Signal that represents the state of a network connection. You want to print the position number of the SENDING enum. Which line of code does that?

You would like to know each time a class property is updated. Which code snippet shows a built-in delegated property that can accomplish this?

What is the correct way to initialize a nullable variable?

You would like to group a list of students by last name and get the total number of groups. Which line of code accomplishes this, assuming you have a list of the Student data class? Data class Student(val firstName: String, val lastName: String)

This code snippet compiles without error, but never prints the results when executed. What could be wrong? Val result = generateSequence(1) { it + 1 }.toList(); Println(result)

In this code snippet, why does the compiler not allow the value of y to change? For(y in 1..100) y+=2

The Kotlin .. operator can be written as which function?

Which line of code is a shorter, more idiomatic version of the displayed snippet? val len: Int = if (x != null) x.length else -1