Kotlin Fundamentals

Kotlin Fundamentals

Professional Development

7 Qs

quiz-placeholder

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Kotlin Fundamentals

Kotlin Fundamentals

Assessment

Quiz

Professional Development

Professional Development

Practice Problem

Hard

Created by

Александр Митясов

Used 11+ times

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7 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Ключевое слово для создания неизменяемых переменных

var

let

final

val

2.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

fun doSmth (): Any {}

val a = "${doSmth()}"

Какого типа будет a?

Any

String

()->Any

CompileError

3.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

val john : Person? = Person("John", 32)

val age = john?.age

val offsetAge = age + 1

Чему будет равен offsetAge?

33

32

null

CompileError

4.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Какой синтаксис служит заменой static полям и методам?

object{}

static object{}

companion object{}

init{}

5.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

class A() {fun one() = 1}

class B: A() {override fun one() = 2}

val a: A = B()

println(a.one())

что будет распечатано?

1

2

CompileError

null

6.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Какой класс служит подтипом всех классов в Kotlin?

Any

Unit

Nothing

Void

7.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

data class A(val one:Int, val two:Int)

...

val (first, second) = A(1,2)

Что произойдёт с first, second?

будут присвоены 1 и 2 соответственно

будут присвоены A(1) и A(2)

CompileError

будут присвоены A(1,2) каждой