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Question 1 of 25
What will be the output?
val someSet = mutableSetOf(1, 2, 2, 3)
someSet.add(2)
someSet.add(5)
println(someSet)
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Question 2 of 25
What will be the output?
val someList = listOf(1, 2, 3)
someList.add(5)
println(someList)
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Question 3 of 25
What will be the output?
val someSet = mutableSetOf(1, 2, 3)
someSet.add(null)
someSet.add(3)
println(someSet)
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Question 4 of 25
What is the default implementation of Set in Kotlin?
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Question 5 of 25
What will be the output?
val someSet = mutableSetOf(1, 2, 3)
someSet.add(5)
someSet.add(4)
println(someSet)
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Question 6 of 25
What will be the output?
val someMap = mapOf(1 to "a", 2 to "b")
val anotherMap = mapOf(2 to "b", 1 to "a")
println(someMap == anotherMap)
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Question 7 of 25
What is the default implementation of a Map in Kotlin?
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Question 8 of 25
What will be the output?
val someMap = mapOf(1 to "a", 2 to "b", 1 to "c")
println(someMap)
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Question 9 of 25
What will be the output?
val emptyList = emptyList()
println(emptyList)
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Question 10 of 25
What will be the output?
val someList = List(3) { it * 10 }
println(someList)
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Question 11 of 25
What will be the output?
val someList = mutableListOf(1, 2, 3)
val anotherReference: List = someList
anotherReference.add(4)
println(someList)
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Question 12 of 25
What will be the output?
val someList = listOf("a", "bb", "cc", "ddd")
val someMap = someList.associateBy { it.length }
println(someMap)
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Question 13 of 25
What will be the output?
val someList = listOf("a", "bb", "cc", "ddd")
val someMap = someList.groupBy { it.length }
println(someMap)
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Question 14 of 25
What will be the output of this referential equality comparison?
val someList = listOf(1, 2, 3, 4)
val filteredList = someList.filter { it % 2 == 0 }
println(someList === filteredList)
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Question 15 of 25
What will be the output?
for (x in 1..5) print(x)
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Question 16 of 25
What will be the output?
for (x in 5 downTo 1) print(x)
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Question 17 of 25
What will be the output?
for (x in 1..10 step 2) print(x)
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Question 18 of 25
What will be the output?
for (x in 1 until 5) print(x)
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Question 19 of 25
How can we check if a range contains element x?
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Question 20 of 25
Which sentence is correct in terms of Sequences multi-step processing? Example:
sequenceOf(1, 2, 3, 4)
.map { it * 10 }
.filter { it % 3 == 0 }
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Question 21 of 25
Which sentence is correct in terms of Iterable multi-step processing? Example:
listOf(1, 2, 3, 4)
.map { it * 10 }
.filter { it % 3 == 0 }
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Question 22 of 25
What will be the output?
val setOne = setOf(1, 2, 3, 4)
val setTwo = setOf(3, 4, 5, 6)
val setThree = setOne union setTwo
println(setThree)
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Question 23 of 25
What will be the output?
val setOne = setOf(1, 2, 3, 4)
val setTwo = setOf(3, 4, 5, 6)
val setThree = setOne subtract setTwo
println(setThree)
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Question 24 of 25
What will be the output?
val setOne = setOf(1, 2, 3, 4)
val setTwo = setOf(3, 4, 5, 6)
val setThree = setOne intersect setTwo
println(setThree)
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Question 25 of 25
What will be the output?
val someSet = emptySet()
val x = someSet.average()
println(x * 2)
