Which of the following is NOT a valid way to handle a potential NullPointerException in Kotlin?
Performing a null check using an if statement.
if
Using the Elvis operator ?: to provide a default value if the variable is null.
?:
Using the safe call operator ?.
?.
Using the let function to execute code only if the variable is not null.
let
How does the 'inline' keyword optimize function calls in Kotlin?
It disables null safety checks within the function.
It replaces the function call with its actual code at compile time.
It converts the function into a lambda expression automatically.
It creates a separate thread for the function execution.
Which of the following is NOT a standard coroutine scope in Kotlin?
lifecycleScope
GlobalScope
CoroutineScope
viewModelScope
What happens if you try to access a lateinit property before it has been initialized?
lateinit
A NullPointerException is thrown.
An IllegalArgumentException is thrown.
An UninitializedPropertyAccessException is thrown.
A KotlinNullPointerException is thrown.
What is the primary risk associated with using the !! operator in Kotlin?
!!
It slows down the execution of the program.
It makes the code less readable.
It can lead to memory leaks.
It can lead to NullPointerExceptions if the variable is null.
When using sealed classes in Kotlin, where must the subclasses be defined?
Subclasses can be defined in Java, but not in Kotlin.
Within the same file as the sealed class declaration.
In a separate file specifically designated for subclasses.
Anywhere within the same module.
When might it be more appropriate to choose an iterative approach over recursion in Kotlin?
When the problem can be solved more efficiently with loops, especially for large inputs.
When the recursive solution would be significantly more readable and concise.
When the function needs to be inlined for performance optimization.
When the problem involves manipulating immutable data structures.
What is the primary purpose of extension functions in Kotlin?
To create abstract methods that must be implemented by subclasses.
To add new functionality to existing classes without inheriting from them.
To define static methods within a class.
To override existing methods of a class.
Which class in Kotlin is used to read data from a file?
FileReader
FileInputStream
FileBuffer
FileScanner
Which function is used to launch a new coroutine in Kotlin?
async
runBlocking
withContext
launch