Kotlin Quiz 4

Can the class have a function of its name?

• true

• false

Which declares an object correctly

• class Human{}

  fun main(){

  val obj =

  new Human()

  }

• class Human{}

  fun main(){

  val obj = Human()

  }

• class Human{}

  fun main(){

  val obj =

  new Human();

  }

• class Human{}

  fun main(){

  val obj =

  Human();

  }

How to declare static members and methods?

• class A{

  static color: String = "Red"

  }

• class A{

  static val color: String = "Red"

  }

• class A{

  static var color = "Red"

  }

• class A{

  companion object{

  val color = "Red"

  }}

What is the output?

class A{

A(){

println("class A instantiated")

}

}

fun main(){

val a = A()

}

• class A instantiated

• "class A instantiated"

• class A: "class A instantiated"

• Error

What is the output?

class Calculator(num1: Int, num2: Int){

fun add() = num1 + num2

}

fun main(){

val calc = Calculator(5,2)

println(calc.add())

}

• 7

• 9

• 11

• Error

which of the following is not OOP concept

• Inheritance

• Acbstraction

• Polymorphism

• Exception

What is the output?

fun main(){

val a = A()

println(10); println(5); println(8); }

class A{

init{

println(10)

println(5)

println(8)

}

}

• 10

  5

  8

  10

  5

  8

• 10

  5

  8

• 10 5 8

  10

  5

  8

fun main(){

val obj = Car.color

}

class Car{

companion object{

val color = "Red"

}

}

What is the data type of obj?

• Car

• val

• companion object

• string

class Home{}

fun main(){

val x = Home()

val y = Home()

println(x == y)

}

• true

• false

what is the modifier that makes a class able to be inherited