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Kotlin | Interview Questions

Kotlin | Interview Questions

Interview questions for Kotlin developers with answers.

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726
29.10.2026
726
29.10.2026
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726
29.10.2026
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Interview questions for Kotlin developers with answers.

Подписчиков 2,449
Тематика Technology
Язык English
Ссылка t.me/easy_kotlin

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Kotlin interview questions: extensions, coroutines, collections. With code examples and explanations for Android and backend.

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Kotlin | Interview Questions
Kotlin | Interview Questions
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🤔 Зачем нужно разделять отображение и бизнес-логику? Разделение UI и бизнес-логики делает код понятнее, тестируемее и проще в поддержке. Это ключевой принцип чистой архитектуры (Clean Architecture) и паттернов MVP, MVVM, MVI. 🚩Что такое UI и бизнес-логика? Плохой код (UI + логика в Activity) class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val button = findViewById(R.id.button) button.setOnClickListener { val result = fetchData() // ❌ Логика в UI button.text = result } } fun fetchData(): String { return "Данные с сервера" // ❌ Тут должна быть ViewModel } } 🚩Как правильно разделять UI и логику? (MVVM) Разделим код на Activity + ViewModel MainActivity (только UI) class MainActivity : AppCompatActivity() { private val viewModel: MainViewModel by viewModels() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val button = findViewById(R.id.button) viewModel.text.observe(this) { text -> button.text = text // ✅ UI обновляется из ViewModel } button.setOnClickListener { viewModel.loadData() // ✅ Вызываем бизнес-логику } } } MainViewModel (бизнес-логика) class MainViewModel : ViewModel() { private val _text = MutableLiveData() val text: LiveData = _text fun loadData() { _text.value = "Данные с сервера" // ✅ UI не знает, откуда данные } } Ставь 👍 и забирай 📚 Базу знаний
Kotlin | Interview Questions
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