Quiz | Croma Campus

How do you define a Fragment in Kotlin?

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

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

Dagger
Hilt
Koin
Dagger-Hilt

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Which of the following is a correct extension function syntax in Kotlin?

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

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

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

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

open
public
extendable
inheritable

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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()

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How do you define a companion object in Kotlin?

companion object
companion class
companion val
companion const

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How do you initialize a lateinit variable in Kotlin?

lateinit var name: String
lateinit val name: String
var name: String = null
val name: String = null

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

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

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

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

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How do you declare a constant in Kotlin?

const val CONSTANT_NAME
val CONSTANT_NAME
const CONSTANT_NAME
let CONSTANT_NAME

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

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

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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

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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)

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Which function is used to 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)

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What is the correct way to handle null safety in Kotlin?

if (variable != null)
variable?.let { }
variable != null ? ...
try { variable } catch {}

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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 = ""

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Which of the following is the correct way to define a sealed class in Kotlin?

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

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How do you create a singleton in Kotlin?

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

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

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

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How do you create a read-only variable in Kotlin?

val name: String
var name: String
const name: String
let name: String

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How do you make a network request in Kotlin using coroutines?

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

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What is the correct way to create an ArrayList in Kotlin?

ArrayList<String>()
arrayListOf<String>()
ArrayList<String>
listOf<String>()

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

Dagger
Hilt
Koin
Dagger-Hilt

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

List
Set
Map
Pair

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What is the correct way to create a sealed class in Kotlin?

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

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