Trantor Senior Android Developer Interview Questions, Process, and Tips

Kotlin extension functions allow adding new functions to existing classes without modifying their source code.

• Extension functions are defined outside the class they extend.

• They can be called on the object of the class they extend.

• They can access the properties and functions of the class they extend.

A higher order function is a function that can take other functions as parameters or return functions as results.

• Higher order functions can be used to create more flexible and reusable code.

• They can be used to implement callbacks, event handling, and functional programming concepts.

• Example: map, filter, and reduce functions in JavaScript are higher order functions.

Activity lifecycle methods are a set of methods that are called at different stages of an activity's life cycle.

• onCreate() - called when the activity is first created

• onStart() - called when the activity is becoming visible to the user

• onResume() - called when the activity will start interacting with the user

• onPause() - called when the activity is going into the background, but still visible

• onStop() - called when the act...read more

Fragments are modular sections of an activity's user interface, allowing for more flexible and dynamic UI designs.

• Fragments can be reused across multiple activities

• They help in creating responsive UIs for different screen sizes

• Fragments can be added or removed dynamically during runtime

• They are useful for implementing multi-pane layouts on tablets