Kotlin Basic QuizBy Parvesh Sandila / September 15, 2023 Welcome to your Kotlin Basic Questions Name Email 1. Given the following Kotlin program, what will be the value of max? val num1 = 10val num2 = 25val num3 = 15val max = if (num1 >= num2 && num1 >= num3) num1else if (num2 >= num1 && num2 >= num3) num2else num3 10 15 30 25 None 2. Which Kotlin feature helps prevent null pointer exceptions? Elvis operator (?:) Unicorn operator (->>) Arrow operator (->) Star operator (*) None 3. How can you define a read-only property in Kotlin? Using the "readonly" keyword Using the "var" keyword Using the "get" keyword Using the "val" keyword None 4. What is the entry point of a Kotlin program? main() function execute() function start() function run() method None 5. What does the following Kotlin program do? fun main() { var n = 10 var factorial = 1 while (n > 0) { factorial *= n n-- } println(factorial)} Prints the numbers from 10 to 1 in reverse order. Calculates the factorial of 10. Calculates the sum of the first 10 numbers. Prints the first 10 prime numbers. None 6. In Kotlin, what is the purpose of the "fun" keyword? It specifies a variable's data type It declares a function It defines a new data type It stands for "funny" None 7. What is the output of the following Kotlin program? fun main() { var sum = 0 for (i in 1..10) { sum += i } println(sum) } 45 55 15 10 None 8. In Kotlin, which collection type represents an ordered list of elements? List Map Array Set None 9. What is the output of the following Kotlin program? fun main() { var a = 5 var b = 10 a = b.also { b = a } println("After swapping: a = $a, b = $b")} This program will not compile. After swapping: a = 0, b = 0 After swapping: a = 10, b = 5 After swapping: a = 5, b = 10 None 10. In Kotlin, what keyword is used to declare a function? func fun method proc None 11. What is the output of the following Kotlin program? fun main() { val numbers = arrayOf(1, 2, 3, 4, 5) val sum = numbers.reduce { acc, num -> acc + num } println(sum)} 10 120 15 3 None 12. How do you declare a nullable variable in Kotlin? Using the * symbol Using the ? operator Using the # symbol Using the ! operator None 13. Given the following Kotlin program, what will be the value of result? val x = 5val y = 3val result = x * y 3 8 53 15 None 14. What is the output of the following Kotlin program? fun main() { var fib1 = 0 var fib2 = 1 for (i in 1..10) { print("$fib1, ") val next = fib1 + fib2 fib1 = fib2 fib2 = next }} 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, This program will not compile. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, None 15. In Kotlin, which keyword is used to declare a variable that cannot be reassigned? var val const let None 1 out of 15
