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Kotlin Programming MCQ for Competitive Exams, Interviews, and Certifications

Ace your competitive exams, technical interviews, and certifications with these Kotlin programming MCQ questions. Perfect for Android developers and software engineers to test their Kotlin skills and knowledge. Page-5 section-2

Each section contains 100 MCQs on Kotlin Program .
41
val short for Value, a constant which cannot be changed once assigned?
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Answer & Solution
Answer: Option C
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42
The function typeChecker receiver a parameter obj of type Any. Based upon the type of obj, it prints different messages for Int, String, Double, and Float types; if not any of the mentioned types, it prints "unknown type". What operator allows you to determine the type of an object?
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Answer & Solution
Answer: Option B
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43
You have created a class that should be visible only to the other code in its module. Which modifier do you use?
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Answer & Solution
Answer: Option A
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44
You are upgrading a Java class to Kotlin. What should you use to replace the Java class's static fields?
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Answer & Solution
Answer: Option C
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45
You are writing a console app in Kotlin that processes test entered by the user. If the user enters an empty string, the program exits. Which kind of loop would work best for this app? Keep in mind that the loop is entered at least once
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Answer & Solution
Answer: Option A
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46
You are attempting to assign an integer variable to a long variable, but Kotlin compiler flags it as an error. Why?
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Answer & Solution
Answer: Option C
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47
Which line of code shows how to display a nullable string's length and shows 0 instead of null?
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Answer & Solution
Answer: Option B
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48
Kotlin interfaces and abstract classes are very similar. What is one thing abstract class can do that interfaces cannot?
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Answer & Solution
Answer: Option D
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49
Inside an extension function, what is the name of the variable that corresponds to the receiver object
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Answer: Option B
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50
Which is the proper way to declare a singleton named DatabaseManager?
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Answer & Solution
Answer: Option A
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