Kotlin Quiz: Test Your Knowledge

Welcome to The Coding College! This Kotlin quiz is designed to help you test your knowledge and understanding of Kotlin programming concepts. The quiz is divided into beginner, intermediate, and advanced levels, ensuring there’s something for everyone.

Instructions

  • Each question has multiple-choice answers.
  • Select the correct answer based on your understanding.
  • Answers are provided at the end of the quiz.

Beginner Level

Q1: What is Kotlin?

A. A database management system
B. A programming language developed by Google
C. A modern programming language for JVM, Android, and more
D. A framework for web development

Q2: How do you declare a variable in Kotlin?

A. var variableName
B. variable variableName
C. int variableName
D. declare variableName

Q3: Which function is the entry point of a Kotlin program?

A. start()
B. main()
C. run()
D. execute()

Q4: What does the following code print?

fun main() {
    val name = "Kotlin"
    println("Hello, $name!")
}

A. Hello, Kotlin!
B. Hello, name!
C. Hello Kotlin!
D. Error

Intermediate Level

Q5: What is the output of the following code?

fun main() {
    val x = 10
    if (x > 5) println("Greater than 5") else println("5 or less")
}

A. Greater than 5
B. 5 or less
C. Error
D. None of the above

Q6: How do you define a function in Kotlin?

A. function myFunction() {}
B. def myFunction() {}
C. fun myFunction() {}
D. void myFunction() {}

Q7: What is the result of the following code?

fun main() {
    val name = "Kotlin"
    println("Hello, $name!")
}

A. 1
B. 2
C. 3
D. 4

Q8: How do you create a read-only list in Kotlin?

A. val list = listOf(...)
B. var list = arrayOf(...)
C. val list = mutableListOf(...)
D. var list = listOf(...)

Advanced Level

Q9: What does the following code do?

fun main() {
    val x = 10
    if (x > 5) println("Greater than 5") else println("5 or less")
}

A. Prints a custom toString() representation of the object
B. Prints the memory address of the object
C. Prints Person(name=John, age=25)
D. Throws an error

Q10: What is the purpose of the companion object in Kotlin?

A. To define static members of a class
B. To declare multiple constructors
C. To implement inheritance
D. To handle null safety

Q11: What is Kotlin’s null safety operator?

A. !!
B. ?.
C. :?
D. Both A and B

Q12: Which of the following represents Kotlin’s way of implementing inheritance?

A. inherit class Child : Parent()
B. extends class Child : Parent()
C. class Child : Parent()
D. derive class Child : Parent()

Quiz Answers

Beginner Level

  1. C
  2. A
  3. B
  4. A

Intermediate Level

  1. A
  2. C
  3. C
  4. A

Advanced Level

  1. C
  2. A
  3. D
  4. C

Why Take Kotlin Quizzes on The Coding College?

Quizzes are an excellent way to reinforce your learning and identify areas for improvement. At The Coding College, we aim to make learning Kotlin engaging and practical with quizzes, tutorials, and hands-on projects.

Conclusion

How did you score? Whether you got all the answers right or need to review some topics, keep practicing and learning.

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