Kotlin Programming MCQ for Competitive Exams, Interviews, and Certifications

91

Which lifecycle method is called to give an activity focus?

A) onResume() B) onVisible() C) onStart() D) onFocus()

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

92

What is the key difference between Iterable<T> and Sequence<T> in Kotlin?

A) Iterable<T> works only on immutable collections, Sequence<T> is also applicable to mutable ones B) Sequences are processes sequentially, Iterables in parallel (multithreaded) C) Sequences are processed lazily, iterables eagerly D) There is no difference, as Sequence<T> is Kotlin's term for Iterable<T>

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

93

Which function is used to iterate over a collection in Kotlin?

A) forEach() B) for() C) map() D) filter()

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

94

Which of these functions can transform a list in Kotlin?

A) map() B) filter() C) forEach() D) None of the above

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

95

How do you create an empty list in Kotlin?

A) emptyList() B) listOf() C) list() D) mutableListOf()

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

96

What is a correct syntax to output "Hello World" in Kotlin?

A) Console.WriteLine("Hello World"); B) System.out.printline("Hello World") C) println("Hello World") D) cout << "Hello World";

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

97

What is the output of the following code: println(5 > 3 && 5 < 10)

A) 2 B) 5 C) false D) true

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

98

You would like to know each time a class property is updated. Which code snippet shows a built-in delegated property that can accomplish this?

A) Delegates.watcher() B) Delegates.observable() C) Delegates.rx() D) Delegates.observer()

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

99

How do you start writing a for loop in Kotlin, to loop through arrays?

A) for x B) for (x in y) C) for (x) D) for x in y

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

100

In Kotlin, code statements do not have to end with a . . . . . . . .

A) semicolon (;) B) comma(,) C) Nothing () D) None of the above

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board