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Kotlin Tutorial
BOSS QUIZ
10 questions · 5 minutes · pass at 70% to clear the track.
05:00
Start
Q1.
Safe call operator is…
from Null Safety
?
?.
!.
?:
Q2.
Kotlin is developed by…
from Intro
Google
JetBrains
Oracle
Microsoft
Q3.
Kotlin compiles to…
from Intro
JVM bytecode (and Native + JS)
WebAssembly only
Native only
C source
Q4.
A nullable type is written as…
from Null Safety
T*
T?
Optional<T>
?T
Q5.
Data classes are best for…
from data class
Mutable singletons
Immutable value objects
Service classes
Activities
Q6.
A mutable variable is declared with…
from val / var
val
var
mut
set
Q7.
A lightweight unit of concurrency in Kotlin is…
from Coroutines
Thread
Coroutine
Task
Fiber
Q8.
Fire-and-forget coroutine is launched with…
from Coroutines
async
launch
runBlocking
runOnUiThread
Q9.
Data classes auto-generate…
from data class
equals/hashCode/toString/copy/componentN
No code
Only toString
Only equals
Q10.
A read-only variable is declared with…
from val / var
val
var
let
const
Submit
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