Finally block behavior in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Done" regardless of exceptions.

Kotlin

fun main() {
    try {
        println("Hello")
    } finally {
        println([1])
    }
}

Drag options to blanks, or click blank then click option'

A"Hello"

B"Done"

C"Error"

D"Try"

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the print statement outside the finally block.

Using the wrong string inside println.

The finally block always runs, so printing "Done" there ensures it prints regardless of exceptions.

2fill in blank

medium

Complete the code to catch an exception and still execute the finally block.

Kotlin

fun main() {
    try {
        val x = 10 / 0
    } catch (e: [1]) {
        println("Caught")
    } finally {
        println("Finally")
    }
}

Drag options to blanks, or click blank then click option'

AArithmeticException

BIOException

CNullPointerException

DException

Attempts:

3 left

💡 Hint

Common Mistakes

Catching the wrong exception type.

Not including the finally block.

Dividing by zero throws an ArithmeticException, so catching that allows the program to handle it and run finally.

3fill in blank

hard

Fix the error in the finally block to print "Cleanup".

Kotlin

fun main() {
    try {
        println("Start")
    } finally {
        println([1])
    }
}

Drag options to blanks, or click blank then click option'

Aprintln("Cleanup")

BCleanup()

CCleanup

D"Cleanup"

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a function inside println incorrectly.

Missing quotes around the string.

Inside println, you need a string literal "Cleanup". Using Cleanup() or Cleanup without quotes causes errors.

4fill in blank

hard

Fill both blanks to return a value from try and override it in finally.

Kotlin

fun test(): Int {
    return try {
        [1]
    } finally {
        [2]
    }
}

Drag options to blanks, or click blank then click option'

A1

B2

Creturn 1

Dreturn 2

Attempts:

3 left

💡 Hint

Common Mistakes

Not using return in finally to override.

Returning values without return keyword.

Returning 1 in try is overridden by returning 2 in finally, so the function returns 2.

5fill in blank

hard

Fill all three blanks to print messages in try, catch, and finally blocks.

Kotlin

fun main() {
    try {
        println([1])
        val x = 5 / 0
    } catch (e: ArithmeticException) {
        println([2])
    } finally {
        println([3])
    }
}

Drag options to blanks, or click blank then click option'

A"Trying"

B"Caught Exception"

C"Cleaning up"

D"Done"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up messages in catch and finally.

Not printing anything in try before error.

The try block prints "Trying", the catch prints "Caught Exception", and finally prints "Cleaning up".