Forthcode Technologies Interview Questions and Answers

Activity lifecycle refers to the series of states an activity goes through during its lifetime in an Android app.

• Activities go through states like onCreate, onStart, onResume, onPause, onStop, onDestroy, etc.

• onCreate is called when the activity is first created, onStart when the activity becomes visible, onResume when the activity starts interacting with the user, onPause when the activity is partially obscured, onStop...read more

Kotlin is better than Java due to its concise syntax, null safety, extension functions, and interoperability with Java.

• Kotlin has a more concise syntax compared to Java, reducing boilerplate code.

• Kotlin has built-in null safety features, reducing the risk of null pointer exceptions.

• Kotlin supports extension functions, allowing developers to add new functionality to existing classes.

• Kotlin is fully interoperable with Ja...read more

Scope functions are functions in Kotlin that allow you to execute a block of code within the context of an object.

• Scope functions include 'let', 'run', 'with', 'apply', and 'also'.

• They help in reducing boilerplate code and improving code readability.

• Each scope function has a specific use case and can be chosen based on the requirements of the code.

• Example: Using 'apply' to initialize properties of an object.

Dependency Injection (DI) is a design pattern used to remove hard-coded dependencies and make components more modular and testable.

• DI is done by providing dependencies to a component from an external source rather than creating them within the component itself.

• This can be achieved through constructor injection, setter injection, or interface injection.

• DI frameworks like Dagger, Guice, and Koin can be used to automate t...read more