Kotlin Programming MCQ for Competitive Exams, Interviews, and Certifications

1

Which code snippet correctly shows a for loop using a range to display "1 2 3 4 5 6"?

A) for(z in 1..7) println("$z ") B) for(z in 1..6) print("$z ") C) for(z in 1 to 6) print("$z ") D) for(z in 1..7) print("$z ")

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Answer & Solution

Answer: Option B

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2

Which snippet correctly shows setting the variable max to whichever variable holds the greatest value, a or b, using idiomatic Kotlin?

A) val max3 = a.max(b) B) val max = a > b ? a : b C) val max = if (a > b) a else b D) if (a > b) max = a else max = b

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Answer & Solution

Answer: Option C

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3

Which lifecycle method should you override to pause the simulation when the app is not on the screen?

A) onDestroy() B) onStop() C) onPause() D) onSaveInstanceState()

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Answer & Solution

Answer: Option B

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4

Your function is passed by a parameter obj of type Any. Which code snippet shows a way to retrieve the original type of obj, including package information?

A) obj.classInfo() B) obj.typeInfo() C) obj::class.simpleName D) obj::class

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Answer & Solution

Answer: Option D

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5

Which function changes the value of the element at the current iterator location?

A) change() B) modify() C) set() (reference) D) assign()

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Answer & Solution

Answer: Option C

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6

The Kotlin .. operator can be written as which function?

A) a.from(b) B) a.range(b) C) a.rangeTo(b) D) a.to(b)

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Answer & Solution

Answer: Option C

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7

How can you create a variable with the floating number 2.8?

A) num = 2.8 float B) val num = 2.8 C) float num = 2.8 D) double num = 2.8

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Answer & Solution

Answer: Option B

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8

How can you create a range of numbers between 5 and 15 in Kotlin?

A) for (x in 5 to 15) B) for (5..15) C) for (5 to 15) D) for (x in 5..15)

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Answer & Solution

Answer: Option D

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9

How to access the elements of an array in Kotlin?

A) array.get(index) B) array[index] C) array(index) D) None of these

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Answer & Solution

Answer: Option B

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10

The actual function for getting the string length in Kotlin language is?

A) lengthof(str) B) string(length) C) str.length D) None of the above options

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Answer & Solution

Answer: Option C

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