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Kotlin Tutorial
BOSS QUIZ
10 questions · 5 minutes · pass at 70% to clear the track.
05:00
Start
Q1.
A compile-time constant uses…
from val / var
const val
val const
static val
final val
Q2.
A nullable type is written as…
from Null Safety
T*
T?
Optional<T>
?T
Q3.
A mutable variable is declared with…
from val / var
val
var
mut
set
Q4.
Elvis operator is…
from Null Safety
?:
??
!!
?.
Q5.
Copy with a few changes uses…
from data class
copy(field = newValue)
with()
clone()
fork()
Q6.
Fire-and-forget coroutine is launched with…
from Coroutines
async
launch
runBlocking
runOnUiThread
Q7.
Kotlin is developed by…
from Intro
Google
JetBrains
Oracle
Microsoft
Q8.
Safe call operator is…
from Null Safety
?
?.
!.
?:
Q9.
Inside a coroutine, suspend a call with…
from Coroutines
await
suspend keyword on the call
No keyword — just call a suspending fn
yield
Q10.
Kotlin compiles to…
from Intro
JVM bytecode (and Native + JS)
WebAssembly only
Native only
C source
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