61. What is the type of arr in the following code?
val arr = arrayof(1, 2, 3)
val arr = arrayof(1, 2, 3)62. From the Supervisor subclass, how do you call the Employee class's display() method?
open class Employee(){
open fun display() = println("Employee display()")
}
class Supervisor : Employee() {
override fun display() {
println("Supervisor display()")
}
}
open class Employee(){
open fun display() = println("Employee display()")
}
class Supervisor : Employee() {
override fun display() {
println("Supervisor display()")
}
}63. The code below shows a typical way to show both index and value in many languages, including Kotlin. Which line of code shows a way to get both index and value more idiomatically?
var ndx = 0;
for (value in 1..5){
println("$ndx - $value")
ndx++
}
var ndx = 0;
for (value in 1..5){
println("$ndx - $value")
ndx++
}64. This code does not print any output to the console. What is wrong?
firstName?.let {
println("Greeting $firstname!")
}
firstName?.let {
println("Greeting $firstname!")
}65. What is the equivalent of the following Java expression in Kotlin?
int x = a ? b : c
int x = a ? b : c 66. 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?
enum class Signal { OPEN, CLOSED, SENDING }
enum class Signal { OPEN, CLOSED, SENDING }67. What is the output of the following code?
val list : List<Int> = listof(1, 2, 3)
list.add(4)
print(list)
val list : List<Int> = listof(1, 2, 3)
list.add(4)
print(list)68. What does the following code print?
val listA = mutableListOf(1, 2, 3)
val listB = listA.add(4)
print(listB)
val listA = mutableListOf(1, 2, 3)
val listB = listA.add(4)
print(listB)69. What is the difference between the declarations of COLOR and SIZE?
class Record{
companion object {
const val COLOR = "Red"
val SIZE = "Large"
}
}
class Record{
companion object {
const val COLOR = "Red"
val SIZE = "Large"
}
}70. In the file main.kt, you ae filtering a list of integers and want to use an already existing function, removeBadValues. What is the proper way to invoke the function from filter in the line below?
val list2 = (80..100).toList().filter(_____)
val list2 = (80..100).toList().filter(_____)Read More Section(Kotlin Program)
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