Java Android faq interview algorithms collections

Collections in java. don’t forget

Руководство по версиям и возможностям Java
[https://habr.com/ru/post/488144/]
Руководство по возможностям Java версий 8-16
[https://habr.com/ru/post/551590/]

https://acecodinginterview.org/

https://habrahabr.ru/post/162017/

https://habr.com/post/156361/

https://habrahabr.ru/post/237043/

Complexity pdf

wiki – Computational complexity theory

Обзор примитивов синхронизации — спинлоки и тайны ядра процессора spinlock
[https://habr.com/ru/articles/278685/]

Peeking behind the forbidden door of Reflection
[https://proandroiddev.com/peeking-behind-the-forbidden-door-of-reflection-by-prafull-mishra-2293d3034e9f]

Вопросы к собеседованию Java-backend, Java core (60 вопросов)
[https://habr.com/ru/post/485678/]

Сборка мусора в Java: что это такое и как работает в JVM
05.2021 [https://nuancesprog.ru/p/12392/]

Очереди с приоритетом в Java
[https://nuancesprog.ru/p/13932/]

Прогресс GC от JDK 8 до JDK 17
[https://habr.com/ru/company/haulmont/blog/591633/]

Как в Java устроено выделение регистров в памяти
[https://habr.com/ru/company/piter/blog/645949/]

Как устроена Java Virtual Machine и её экосистема: подробный гайд
[https://skillbox.ru/media/code/kak-ustroena-java-virtual-machine-i-ee-ekosistema/]

Java Synchronized: What Is Thread Synchronization In Java
[https://www.softwaretestinghelp.com/what-is-thread-synchronization-in-java/]

Как работает UI в Android. Не все так сложно
[https://habr.com/ru/post/665806/]
Магия Dispatcher’ов и как сделать свой Main
[https://habr.com/ru/post/680946/]
Main Loop (Главный цикл) в Android Часть 1. Пишем свой цикл. Main Thread.
[https://habr.com/ru/companies/cian/articles/588314/]

Seven Types of JAVA Garbage Collectors
11.2019 [https://medium.com/@hasithalgamge/seven-types-of-java-garbage-collectors-6297a1418e82]
Android Garbage Collection in a Nutshell
[https://medium.com/@banerjee.s.sayans/android-garbage-collection-in-a-nutshell-e5c8acfa1538]
Garbage Collection и JVM
[https://habr.com/ru/companies/otus/articles/776342/]
OutOfMemory
[https://habr.com/ru/articles/749568/]

Введение в байт-код Java
05.2021 [https://nuancesprog.ru/p/12440/]
Глубокое погружение в Java Memory Model
[https://habr.com/ru/post/685518/]

Java string pool
Бассейн со строками [https://fi5t.xyz/posts/string-pool/]
[https://topjava.ru/blog/rukovodstvo-po-string-pool-v-java]
Предположим, нам дали два целых числа, но не примитивы, а Integer-объекты…
[https://habr.com/ru/companies/ibs/articles/739380/]

Эпизод 1. Скрытая угроза Java Core. Уровень Юнглинг
[https://habr.com/ru/company/neoflex/blog/675484/]

Object equality in Java and Kotlin
03.2022 [https://medium.com/booking-com-development/object-equality-in-java-and-kotlin-9441f34e2163]

O notation
Big O нотация: что это такое и почему ее обязательно нужно знать каждому программисту
[https://proglib.io/p/big-o-notaciya-chto-eto-takoe-i-pochemu-ee-obyazatelno-nuzhno-znat-kazhdomu-programmistu-2022-02-17]
[https://habr.com/ru/articles/444594/]
[https://habr.com/ru/articles/782608/]
Что такое «O» большое в программировании?
[https://nuancesprog.ru/p/15191/]
Структуры данных: асимптотический анализ
[https://nuancesprog.ru/p/15208/]
Структуры данных: «жадные» алгоритмы
[https://nuancesprog.ru/p/15209/]
P vs NP problems
[https://twitter.com/ValeriiZhyla/status/1455462831420215296]

pdf, pdf

Введение в анализ сложности алгоритмов (часть 1) (https://habr.com/post/196560/)

[code language="java"]
int a = 1;
while (a &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; n) {
a = a * 2;
}
[/code]

is lg n

https://auth0.com/blog/best-practices-in-android-development/

Как реализованы JIT-компиляторы
[https://habr.com/ru/company/mailru/blog/513290/]

Архитектура виртуальной машины Java: объяснение для начинающих
[https://nuancesprog.ru/p/15245/]

Все о ключевых словах static и final
[https://nuancesprog.ru/p/13968/]

Синхронизация в Java. Часть 1
[https://nuancesprog.ru/p/8695/]

Основы программирования TCP-сокетов на Java
[https://nuancesprog.ru/p/8583/]
Основы программирования UDP-сокетов на Java
[https://nuancesprog.ru/p/8752/]

Often Ignored Stuff — Android Data Structures (https://medium.com/@ankitsharma6466/often-ignored-stuff-android-data-structures-ec2efff847ea)

Android Interview Questions Cheat Sheet [https://medium.com/@anitaa_1990/android-interview-questions-cheat-sheet-96ea01c88def]

Android Interview Questions Cheat Sheet — Part II [https://android.jlelse.eu/android-interview-questions-cheat-sheet-part-ii-bea0633f0da7]

7 Android Lifecycle Interview Questions That Some Got Wrong
11.2022 [https://medium.com/mobile-app-development-publication/android-lifecycle-interview-questions-that-some-got-wrong-926b39b19a61]

String, StringBuilder и StringBuffer: понимаете ли вы разницу?
[https://nuancesprog.ru/p/9504/]

Tips:

JPA, Hibernate pdf
java opensource on github pdf
collections (jdk, guava, apache etc) pdf
java stream api pdf dzone
studing java pdf
links pdf
inputstream into string pdf
map, substring in string pdf
json pdf

Android

Handler, Looper, HandlerThread (Demystifying Android Looper, Handler, and HandlerThread [https://medium.com/mindorks/demystifying-android-looper-handler-and-handlerthread-3eb9e4951825])
serializable, parcelable
CodePath Android Cliffnotes [https://github.com/codepath/android_guides/wiki]
Service, IntentService. What is inside?
Your Cheat Sheet For Android Interview – Android Interview Questions [https://github.com/MindorksOpenSource/android-interview-questions]
Fragment, FragmentTransaction, commit. How does the commit method work? Is commit synchronized?
Synchronization, Inter-process communication: mutexes, semaphores, events, etc.
deadlock. how to avoid it.
Collections in java
deep link [https://developer.android.com/training/app-links/deep-linking], app link [https://developer.android.com/training/app-links]
Singleton and double checking
Checked and unchecked exceptions, in Java: url
Memory leaks due to rotation with AsyncTask
what is aar, dex
dagger
RxJava
okhttp, retrofit
What is UI-thread, how does it work?
how to avoid crash of application if a service can occur crash – we can start the service in another process
layout: frame, relative, linear – rendering
Fragment.commitAllowingStateLoss (https://medium.com/inloopx/demystifying-androids-commitallowingstateloss-cb9011a544cc)
Loader
Is it possible that onDestroy is invoked without onPause and onStop? Yes, if there is exception in onCreate.
if Activity are closed by OS, then onDestroy will not be invoked.
Empty constructor of Fragment is needed in state restoring.
Communication between fragments and activities
types of Intent
what will be after onError in RxJava
mvc, mvp, mvi, mvvm. Is aac about real mvvm?
Which lifecycle methods of activity will be guaranteed invoked if OS destroys the one?

Android

fragment, inner fragments, childFragmentManager, what to use instead of fragments
save state of app, onSaveInstanceState, setRetainInstance(true), onRetainNonConfigurationInstance
how does dagger save state
solid. DI – where is inversion, service locator
inner classes in java, types of them;
types of references in java – Finally understanding how references work in Android and Java [https://medium.com/google-developer-experts/finally-understanding-how-references-work-in-android-and-java-26a0d9c92f83]
how to works generics in java
OOP and 4 principles [https://en.wikipedia.org/wiki/Object-oriented_programming]
java – atomic operations
problems of reflection in java – slow and errorable
hot to determine complexity of quicksort
android animation – requestlayout [https://stackoverflow.com/questions/13856180/usage-of-forcelayout-requestlayout-and-invalidate]. What is the best way to animate View?
How to increase priority of Android Service – 1. create Foreground. 2. bind to the service.
startService vs bindService. how to stop them
a few receivers listen to the same action. how will be they work?
Gradle. type, flavor, buildvariants
proguard and ext.
What is the order of starting of android components: application, content provider, activity, broadcast, activity
Android Interview Questions [https://medium.com/mindorks/android-interview-questions-ch-1-7ff50dd47fb2] [https://medium.com/mindorks/android-interview-questions-ch-2-c3fa19e19366]
Android Interview Questions & How to Interview Candidates

Android

When onSavedInstanceState is called?
If there is a stack of several activities, how will activities be restored? (order of callbacks)

Difference between callable vs. runnable

What is context? What methods does it have? Activity context vs. application context. Context + theme. How to implement different themes for 2 fragments which are simultaneously on the screen?

What is lifecycle of arguments of fragment?

CustomView, onMeasure, onLayout, onDraw, invalidate, requestLayout. Why is view needed a context in constructor? Can we pass application context?

Thread-safe collection. How are they implemented? What is Atomic<>? CopyOnWriteArrayList?

Generic in java. Why is primitive not allowed? Compile-time or run-time?

Network

REST, SOAP, WSDL

Object methods

[code language="java"]
public native int hashCode();
public boolean equals(Object obj) {
return (this == obj);
}
protected native Object clone() throws CloneNotSupportedException;
public String toString() {
return getClass().getName() + &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;quot;@&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;quot; + Integer.toHexString(hashCode());
}
public final native void notify();
public final native void notifyAll();
public final native void wait(long timeout) throws InterruptedException;
protected void finalize() throws Throwable { }
[/code]

ob1.Equals(ob2) --> ob1.hashcode == ob2.hashcode [https://habr.com/ru/company/otus/blog/443710/]

pdf

Map is not a collection.

Questions:

differences between ArrayList and LinkedList
https://habrahabr.ru/post/162017/
https://habrahabr.ru/post/159557/
https://habrahabr.ru/post/128269/
https://habrahabr.ru/post/127864/
HashMap
BinaryTree
BalancedTree

17+ Binary Tree Coding Practice Problems from popular Programming Interview Questions
[https://piprogramming.org/articles/17-Binary-Tree-Coding-Practice-Problems-from-popular-Programming-Interview-Questions-0000000013.html]

Interfaces, Classess:

Multithreading

wait, notify, notifyAll, concurrent

syncronized, volatile

Understanding Multithreading, ThreadPoolExecutor, Callable, Future by Example [https://medium.com/mindorks/understanding-multithreading-threadpoolexecutor-callable-future-by-example-9ff2419facf7]

Жизненный цикл потока в Java
[https://nuancesprog.ru/p/10254/]
Потоки в Java: От рождения до смерти. Введение в многопоточность
[https://habr.com/ru/articles/776914/]
Мастерство многопоточности: Превращаем Java в шедевр параллельного программирования
[https://habr.com/ru/articles/776500/]

Что такое ExecutorService?
[https://habr.com/ru/post/554608/]

Android

Жизненный цикл Android-приложений
[https://tproger.ru/translations/lifecycle-in-android-apps]

There are 4 main components: activity, service, broadcastreceiver, ContentProvider

BroadcastReceiver can be registered in manifest or in code.

Service lifecycle:

Restart of service:

Service in UI and service in another thread

Activity lifecycle:

if a view has ID then

Activity.OnCreate(Bundle)

Sparse collections

HashMap	Array class
<Integer, Object>	SparseArray
<Integer, Boolean>	SparseBooleanArray
<Integer, Integer>	SparseIntArray
<Integer, Long>	SparseLongArray
<Long, Object>	LongSparseArray

@AndroidSobes – Все вопросы по Android [ https://itsobes.ru/AndroidSobes/ ]

Android Interviews in 2019 [ https://proandroiddev.com/android-interviews-in-2019-aa518f321ff ]

Понятнее о S.O.L.I.D
[https://habr.com/ru/post/508086/]

The S.O.L.I.D Principles in Pictures
[https://medium.com/backticks-tildes/the-s-o-l-i-d-principles-in-pictures-b34ce2f1e898]

Kotlin question
[https://habr.com/ru/articles/721084/]
[https://habr.com/ru/post/722686/]
[https://habr.com/ru/articles/728742/]

Android questins and answers
Часть первая ответника, Java [ https://medium.com/sasha-inverse/%D1%87%D0%B0%D1%81%D1%82%D1%8C-%D0%BF%D0%B5%D1%80%D0%B2%D0%B0%D1%8F-%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D0%BD%D0%B8%D0%BA%D0%B0-java-6545095f0ccb ]

Часть вторая, Kotlin [ https://medium.com/sasha-inverse/%D1%87%D0%B0%D1%81%D1%82%D1%8C-%D0%B2%D1%82%D0%BE%D1%80%D0%B0%D1%8F-kotlin-ef10c9072d7f ]

Часть третья, RxJava [ https://medium.com/sasha-inverse/%D1%87%D0%B0%D1%81%D1%82%D1%8C-%D1%82%D1%80%D0%B5%D1%82%D1%8C%D1%8F-rxjava-f0837d7fbc33 ]

Часть четвёртая ответника, платформа Android. [ https://medium.com/sasha-inverse/%D1%87%D0%B0%D1%81%D1%82%D1%8C-%D1%87%D0%B5%D1%82%D0%B2%D1%91%D1%80%D1%82%D0%B0%D1%8F-%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D0%BD%D0%B8%D0%BA%D0%B0-%D0%BF%D0%BB%D0%B0%D1%82%D1%84%D0%BE%D1%80%D0%BC%D0%B0-android-5cfe8a985967 ]

Часть пятая, общие вопросы разработки ПО. [ https://medium.com/sasha-inverse/%D1%87%D0%B0%D1%81%D1%82%D1%8C-%D0%BF%D1%8F%D1%82%D0%B0%D1%8F-%D0%BE%D0%B1%D1%89%D0%B8%D0%B5-%D0%B2%D0%BE%D0%BF%D1%80%D0%BE%D1%81%D1%8B-%D1%80%D0%B0%D0%B7%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%BA%D0%B8-%D0%BF%D0%BE-96d274124171 ]

Часть-первая-ответника-Java-Sasha_Inverse-Medium Download

Часть вторая, Kotlin – Sasha_Inverse – Medium Download

Часть третья, RxJava – Sasha_Inverse – Medium Download

Часть четвёртая ответника, платформа Android. – Sasha_Inverse – Medium Download

Часть пятая, общие вопросы разработки ПО. – Sasha_Inverse – Medium Download

Top 50 Kotlin interview questions [https://piotr-codersee.medium.com/50-kotlin-interview-questions-ebecb32884b8]

Android Developer should know these Data Structures for Next Interview [ https://medium.com/mindorks/android-developer-should-know-these-data-structures-for-next-interview-9681f06bb3ca ]

java-faq Download

Как я успешно прошел шесть собеседований в Силиконовой долине
[https://habr.com/ru/company/digital-ecosystems/blog/437484/]

Моя любимая задача для собеседований по программированию
[https://habr.com/ru/companies/ruvds/articles/775570/]
Моя любимая задачка по программированию для кодинг-интервью
[https://habr.com/ru/companies/ispsystem/articles/779224/]

Подготовка к собеседованиям в IT-гиганты: как я преодолела проклятье алгоритмического собеседования
[https://habr.com/ru/post/499394/]

Как стать долларовым миллионером за 30 лет, лежа на диване
[https://habr.com/ru/post/500754/]

Как устроиться в LinkedIn, Facebook, Google в Кремниевой Долине
[https://habr.com/ru/post/503642/]

A curated list of awesome Android articles sorted by topic.
[https://github.com/ImangazalievM/android-developer-reference]

Собеседую программистов на Java. Единый набор вопросов для любого уровня
[https://habr.com/ru/post/505700/]

Как стать GDE: интервью с Евгением Мацюком и Александром Денисовым
[https://medium.com/@al.gorshkoov/%D0%BA%D0%B0%D0%BA-%D1%81%D1%82%D0%B0%D1%82%D1%8C-gde-%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B2%D1%8C%D1%8E-%D1%81-%D0%B5%D0%B2%D0%B3%D0%B5%D0%BD%D0%B8%D0%B5%D0%BC-%D0%BC%D0%B0%D1%86%D1%8E%D0%BA%D0%BE%D0%BC-%D0%B8-%D0%B0%D0%BB%D0%B5%D0%BA%D1%81%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%BC-%D0%B4%D0%B5%D0%BD%D0%B8%D1%81%D0%BE%D0%B2%D1%8B%D0%BC-48adcd5e022b]

Kotlin Android Interview Questions
[https://blog.mindorks.com/kotlin-android-interview-questions]

Kotlin for Interviews — Cheatsheet
[https://blog.kotlin-academy.com/kotlin-for-interviews-cheatsheet-88a9831e9d55]

Kotlin for Interviews — Part 1: Common Data Types
[https://blog.kotlin-academy.com/kotlin-for-interviews-part-1-common-data-types-886ea1e40645]

Kotlin Interview Questions — Part-1
[https://medium.com/@mmlilla90/kotlin-interview-questions-part-1-2d63fece9f18]
[https://medium.com/@mmlilla90/kotlin-interview-questions-part-2-62d174439c07]

A curated list of awesome Android articles sorted by topic.
[https://github.com/ImangazalievM/android-developer-reference]

Как проходят алгоритмические секции на собеседованиях в Яндекс
[https://habr.com/ru/company/yandex/blog/449890/]

If Kotlin Runs on the JVM Just Like Java, Then How Does It Provide So Many Great Features?
https://betterprogramming.pub/kotlin-runs-on-the-jvm-just-like-java-how-does-it-provide-so-many-great-features-b27ed269015b

Вопрос на сертификационном экзамене: применение Threads и Executors
https://habr.com/ru/companies/ibs/articles/743360/

Разбор тестового задания на позицию Android Developer
https://habr.com/ru/articles/746146/

Введение в Java Process Memory Model
https://habr.com/ru/articles/744834/

Типичная задача на собеседовании: URL Shortener
https://habr.com/ru/articles/746602/

Введение в многопоточность в Java очень простым языком: Процессы, Потоки и Основы синхронизации
https://habr.com/ru/articles/745910/

Пишем виртуальную машину (интерпретатор) простого байткода + JIT компиляция
https://habr.com/ru/articles/749152/

Инструментация байт-кода Java
https://habr.com/ru/articles/750028/

Разница между загрузкой и инициализацией классов в Java на любопытном примере
https://habr.com/ru/articles/740156/

Ahead of time compilation proposed for the JVM
https://www.infoworld.com/article/3704490/ahead-of-time-compilation-proposed-for-the-jvm.html

Перестаём бояться генерировать байт-код
https://habr.com/ru/articles/759990/

Многопоточность в мобильной разработке
https://habr.com/ru/articles/739212/

8 типичных нетипичных советов Android-разработчику перед интервью
https://habr.com/ru/companies/alfa/articles/732874/

Minding your Handlers and Queues
https://code.cash.app/minding-your-handlers-and-queues

7 Android Lifecycle Interview Questions That Some Got Wrong
https://medium.com/mobile-app-development-publication/android-lifecycle-interview-questions-that-some-got-wrong-926b39b19a61

Modern Android Interview Questions
https://proandroiddev.com/modern-android-interview-questions-f2b9889102ee

Многопоточность Java. #неОпятьАСнова #javaJunior #javaCore
https://habr.com/ru/articles/693244/

Synchronization, Thread-Safety and Locking Techniques in Java and Kotlin
https://proandroiddev.com/synchronization-and-thread-safety-techniques-in-java-and-kotlin-f63506370e6d

Podlodka-Crew-собеседование-по-многопоточке Download

Применение структур данных и алгоритмов на практике на примере Skype, Uber и Skyscanner
[https://tproger.ru/translations/applying-data-structures-and-algorithms/]

All you need to know about ArrayMap & SparseArray
[https://proandroiddev.com/all-you-need-to-know-about-arraymap-sparsearray-49759c2ecbf9]
[https://t.me/android_live/599]