Quiz | Croma Campus

Which keyword is used to define a function in Kotlin?

def
fun
function
func

Mark for review

How do you define a lambda function in Kotlin?

{ x: Int -> x * 2 }
lambda x: Int -> x * 2
x: Int => x * 2
func x: Int -> x * 2

Mark for review

Which type in Kotlin represents a collection of key-value pairs?

List
Set
Map
Pair

Mark for review

Which of the following is the correct way to declare a variable in Kotlin?

var name: String
var name = String
var name: String = ""
var name = ""

Mark for review

How do you create an instance of a class in Kotlin?

ClassName()
new ClassName()
ClassName
ClassName.new()

Mark for review

How do you create a sealed class in Kotlin?

sealed class MyClass
sealed abstract class MyClass
sealed MyClass
abstract sealed class MyClass

Mark for review

What is the correct way to declare a nullable variable in Kotlin?

var name: String?
var name = null
var name: String = null
var name = ""

Mark for review

What is the correct way to get a reference to a TextView in Kotlin?

findViewById<TextView>(R.id.textView)
findViewById(R.id.textView)
findTextView(R.id.textView)
getView<TextView>(R.id.textView)

Mark for review

What is the correct way to declare a list of integers in Kotlin?

listOf(1, 2, 3)
arrayListOf(1, 2, 3)
List<Int>(1, 2, 3)
ArrayList<Int>(1, 2, 3)

Mark for review

How do you define a data class in Kotlin?

class Data(val a: Int)
data class Data(val a: Int)
class Data(a: Int)
data Data(val a: Int)

Mark for review

Which library is commonly used for dependency injection in Kotlin for Android development?

Dagger
Hilt
Koin
Dagger-Hilt

Mark for review

How do you define a Fragment in Kotlin?

class MyFragment : Fragment()
class MyFragment extends Fragment()
class MyFragment inherits Fragment()
class MyFragment implements Fragment()

Mark for review

How do you start a new activity in Android using Kotlin?

startActivity(Intent(this, NewActivity::class.java))
startActivity(NewActivity::class.java)
startNewActivity(Intent(this, NewActivity::class.java))
startNewActivity(NewActivity::class.java)

Mark for review

Which annotation is used to bind a view in a Kotlin Android activity?

@BindView
@ViewBind
@Bind
@FindView

Mark for review

What is the correct way to declare a nullable variable in Kotlin?

var name: String?
var name = null
var name: String = null
var name = ""

Mark for review

Which of the following is the correct way to define a companion object in Kotlin?

companion object
companion class
companion val
companion const

Mark for review

What is the Kotlin equivalent of the Java 'switch' statement?

case
select
when
switch

Mark for review

How do you create a singleton in Kotlin?

class Singleton { }
object Singleton { }
static class Singleton { }
object Singleton: Singleton { }

Mark for review

How do you handle an HTTP response in Kotlin using the Retrofit library?

response.body()
response.data()
response.get()
response.json()

Mark for review

How do you convert a Kotlin list to a mutable list?

list.toMutableList()
list.toChangeableList()
list.asMutable()
list.mutableCopy()

Mark for review

How do you check if a string is not empty in Kotlin?

if (string != "")
if (string.isNotEmpty())
if (string.isNotBlank())
if (string != null)

Mark for review

How do you handle a background task in Kotlin using coroutines?

withContext(Dispatchers.IO) { }
GlobalScope.launch { }
coroutineScope { }
async { }

Mark for review

How do you define an inline function in Kotlin?

inline fun func() { }
inline function func() { }
func inline() { }
function inline() { }

Mark for review

Which keyword is used to indicate that a Kotlin class can be inherited from?

open
public
extendable
inheritable

Mark for review

How do you handle an item click event in a RecyclerView adapter in Kotlin?

setOnClickListener { }
itemClickListener { }
onClick { }
setItemClickListener { }

Mark for review

What is the correct way to declare an extension function in Kotlin?

fun String.length: Int
fun String.length()
fun String.len(): Int
fun String.len()

Mark for review

How do you define a primary constructor in a Kotlin class?

constructor(name: String)
primary constructor(name: String)
init(name: String)
class ClassName(name: String)

Mark for review

Online Exam Quiz

Online

Did you like this Question

Get a 1:1 Mentorship call with our Career Advisor