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