Android

Explain what an abstract class is and how it differs from a regular class.

What is the purpose of the Single operator in RxJava and in which scenarios is it used?

Junior — Middle

Яндекс

What are the advantages and features of using composition in programming?

Junior — Middle

Яндекс

Tell me about cases where you had to make changes to already implemented solutions at your previous job.

Explain the differences between zip and merge functions in the context of data processing or lists or streams.

What methods do you use to perform background tasks?

What happens if you insert a record with null as the key into a HashMap?

What do you expect from your future position compared to your current or previous job?

Is the thread the main entity associated with the garbage collection process in a data structure tree?

Junior — Middle

Т-Банк

Can you explain how the data class structure is implemented at a low level?

How is null value compatibility ensured between Java and Kotlin?

Have you had experience working with multithreading and parallel task execution in Java?

How do the Handler and Looper components interact in the message processing system?

Junior — Middle

RutubeЛеруаМерлен

Can you list the operators used in Flow?

What are the main differences between Middle and Senior level developers in terms of professional training and responsibility?

How can a Spinlock mechanism be implemented for thread synchronization?

Can Map be considered a subclass of the Collection interface in Java?

What is the purpose of annotations in Jetpack Compose and how are they used?

Is it possible to configure RecyclerView to display all items at once, bypassing the lazy loading mechanism?

How is exception handling performed inside coroutines in your experience?