Kotlin Questions

Performing a null check using an if statement.

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.

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.

lifecycleScope

GlobalScope

CoroutineScope

viewModelScope

A NullPointerException is thrown.

An IllegalArgumentException is thrown.

An UninitializedPropertyAccessException is thrown.

A KotlinNullPointerException is thrown.

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.

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 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.

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.

FileReader

FileInputStream

FileBuffer

FileScanner

async

runBlocking

withContext

launch