[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"me":3,"catalog:tr:mobile\u002Fkt-kotlin-type-system-null-safety":4,"config":211},null,{"field_key":5,"field_name":6,"seniority":7,"topic_key":8,"topic_name":9,"spec_key":7,"spec_name":7,"locale":10,"cell_total":11,"field_total":12,"seniorities":13,"topics":17,"specs":112,"samples":126},"mobile","Mobil","","kt-kotlin-type-system-null-safety","Kt Kotlin Type System Null Safety","tr",75,2400,[14,15,16],"junior","mid","senior",[18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,70,73,76,79,82,85,88,91,94,97,100,103,106,109],{"key":19,"name":20,"count":11},"fl-dart-async-isolates","Fl Dart Async Isolates",{"key":22,"name":23,"count":11},"fl-dart-language-null-safety","Fl Dart Language Null Safety",{"key":25,"name":26,"count":11},"fl-flutter-persistence-storage","Fl Flutter Persistence Storage",{"key":28,"name":29,"count":11},"fl-flutter-platform-channels-lifecycle","Fl Flutter Platform Channels 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Native",[127,145,158,172,185,198],{"id":128,"topic":9,"difficulty":129,"body":130,"options":131,"correct_key":139,"explanation":144},"019fa914-614e-7eeb-96c8-0a42de532ba7",1,"Bir sınıfı `data class` olarak tanımlamak otomatik olarak neyi üretir?",[132,135,138,141],{"key":133,"text":134},"a","Dosya dışından örnekleme engelleyen private bir constructor.",{"key":136,"text":137},"b","Sadece varsayılan, parametresiz bir constructor.",{"key":139,"text":140},"c","`equals()`, `hashCode()`, `toString()` ve `copy()`.",{"key":142,"text":143},"d","Hiçbir annotation gerektirmeden otomatik Parcelable serileştirme.","`data class`, primary constructor property'lerinden yapısal `equals`\u002F`hashCode`\u002F`toString`\u002F`copy` (ve `componentN` fonksiyonları) üretir, tekrar eden kod yazımını azaltır.",{"id":146,"topic":9,"difficulty":129,"body":147,"options":148,"correct_key":142,"explanation":157},"019fa914-6150-7e4e-99d0-bab52d9ed01f","```kotlin\ndata class Point(val x: Int, val y: Int)\nval p1 = Point(1, 2)\nval p2 = Point(1, 2)\nprintln(p1 == p2)\n```\nNe yazdırılır?",[149,151,153,155],{"key":133,"text":150},"false, çünkü `==` class'larda referans kimliğini kontrol eder.",{"key":136,"text":152},"`Point`'in `open` olarak işaretlenip işaretlenmediğine bağlıdır.",{"key":139,"text":154},"Derleme hatası, `data class` `==`'i override edemez.",{"key":142,"text":156},"true","`data class`, yapısal bir `equals()` üretir, bu yüzden `==` referansı değil property değerlerini karşılaştırır; `x`\u002F`y` eşit olan iki instance eşittir.",{"id":159,"topic":9,"difficulty":160,"body":161,"options":162,"correct_key":136,"explanation":171},"019fa914-6152-7729-b9bb-545853aafc0d",2,"`data class Account(val id: String, var balance: Double)` bir `HashSet`'e ekleniyor. Ekleme sonrası, set içindeki nesne üzerinde `balance` değiştiriliyor. Bu ne riski yaratır?",[163,165,167,169],{"key":133,"text":164},"Risk yok, `HashSet` her mutasyonda hash kodlarını otomatik yeniden hesaplar.",{"key":136,"text":166},"Nesnenin hash kodu değişebilir, set içindeki lookup'ları bozar.",{"key":139,"text":168},"`balance` mutasyonu içeride `copy()`'i tetikler, yeni bir eleman oluşturur.",{"key":142,"text":170},"`HashSet` elemanları immutable olduğundan mutasyon runtime'da reddedilir.","`hashCode()`'da kullanılan mutable property'ler hash-tabanlı koleksiyonlarda tehlikelidir: ekleme sonrası nesneyi değiştirmek doğru bucket'ının konumunu değiştirebilirken set onu hâlâ eski bucket'ta tutar, `contains`\u002Flookup sessizce bozulur.",{"id":173,"topic":9,"difficulty":129,"body":174,"options":175,"correct_key":142,"explanation":184},"019fa914-6155-7786-a0b8-f8b2bbefc3cc","`data class Account(val id: String, val balance: Double)` instance'ında `.copy(balance = 500.0)` çağırmak ne yapar?",[176,178,180,182],{"key":133,"text":177},"Orijinal instance üzerinde `balance`'ı yerinde değiştirir.",{"key":136,"text":179},"`balance` `val` olarak tanımlandığı için runtime'da hata fırlatır.",{"key":139,"text":181},"Orijinal instance'ı siler ve ona olan her referansı değiştirir.",{"key":142,"text":183},"`balance`'ı değiştirilmiş yeni bir instance döner.","`copy()` (`data class` için üretilir) seçili constructor property'lerini değiştirmenize izin verirken gerisini yeniden kullanan yeni bir instance döndürür — orijinal instance dokunulmadan kalır.",{"id":186,"topic":9,"difficulty":160,"body":187,"options":188,"correct_key":133,"explanation":197},"019fa914-6158-79d5-90f1-a1c578ff8a58","Derleyici, `sealed class` hiyerarşisi üzerinde `else` dalı olmadan tam-kapsayıcı bir `when` ifadesine neden izin verir?",[189,191,193,195],{"key":133,"text":190},"Alt sınıf kümesi kapalıdır, bu yüzden derleyici her durumu numaralandırabilir.",{"key":136,"text":192},"Çünkü `sealed class` her alt sınıfı bir `object` olmaya zorlar, bu yüzden her zaman tam olarak iki durum vardır.",{"key":139,"text":194},"Çünkü `when` tipten bağımsız olarak her zaman bir `else` dalı gerektirir.",{"key":142,"text":196},"Çünkü sealed class'lar hiç alt sınıflandırılamaz, bu yüzden sadece bir durum vardır.","Bir `sealed class`'ın alt sınıfları, derleyicinin tamamen numaralandırabileceği bilinen, kapalı bir kümeyle sınırlıdır, bu yüzden her alt sınıfı kapsayan bir `when` kanıtlanabilir şekilde tam-kapsayıcıdır ve genel-geçer bir `else`'e ihtiyaç duymaz.",{"id":199,"topic":9,"difficulty":160,"body":200,"options":201,"correct_key":139,"explanation":210},"019fa914-6159-7854-8ce7-56be49fcf7b2","```kotlin\nsealed class Result\ndata class Ok(val v: Int) : Result()\ndata class Err(val msg: String) : Result()\n\nfun describe(r: Result): String = when (r) {\n    is Ok -> \"ok: ${r.v}\"\n    is Err -> \"err: ${r.msg}\"\n}\n```\nSonradan yeni bir alt sınıf `object Pending : Result()` ekleniyor. `describe`'a ne olur?",[202,204,206,208],{"key":133,"text":203},"Hiçbir şey, `describe` derlenmeye devam eder ve `Pending` için sessizce null döner.",{"key":136,"text":205},"Yeni alt sınıf derleme zamanında reddedilir çünkü `Result`'ın zaten iki alt sınıfı var.",{"key":139,"text":207},"Derleyici artık `when`'i tam-kapsayıcı olmadığı için raporlar.",{"key":142,"text":209},"`describe`, herhangi bir argümanla ilk çağrıldığında runtime exception fırlatır.","`Result` sealed olduğundan derleyici her alt sınıfı takip eder; `Pending` eklemek, ifade olarak kullanılan (tam-kapsayıcılık gerektiren) mevcut `when`'i eksik bırakır, derleyici bu eksik dalı sessizce geçmek yerine raporlar.",{"fields":212,"seniorities":388,"interview_shapes":389,"locales":394,"oauth":396,"question_count":399,"coach_enabled":400,"jd_match_enabled":400},[213,238,258,275,299,312,331,340,362,369,375,382],{"key":214,"name_tr":215,"name_en":215,"sort":129,"specializations":216},"backend","Backend",[217,220,223,226,229,232,235],{"key":218,"name":219,"field":214},"general","Genel",{"key":221,"name":222,"field":214},"go","Go",{"key":224,"name":225,"field":214},"python","Python",{"key":227,"name":228,"field":214},"java","Java",{"key":230,"name":231,"field":214},"csharp","C#\u002F.NET",{"key":233,"name":234,"field":214},"nodejs","Node.js",{"key":236,"name":237,"field":214},"php","PHP",{"key":239,"name_tr":240,"name_en":240,"sort":160,"specializations":241},"frontend","Frontend",[242,243,246,249,252,255],{"key":218,"name":219,"field":239},{"key":244,"name":245,"field":239},"javascript","JavaScript",{"key":247,"name":248,"field":239},"typescript","TypeScript",{"key":250,"name":251,"field":239},"react","React",{"key":253,"name":254,"field":239},"vue","Vue",{"key":256,"name":257,"field":239},"angular","Angular",{"key":259,"name_tr":260,"name_en":260,"sort":261,"specializations":262},"fullstack","Fullstack",3,[263,264,265,266,267,268,269,270,271,272,273,274],{"key":218,"name":219,"field":259},{"key":221,"name":222,"field":214},{"key":224,"name":225,"field":214},{"key":227,"name":228,"field":214},{"key":230,"name":231,"field":214},{"key":233,"name":234,"field":214},{"key":236,"name":237,"field":214},{"key":244,"name":245,"field":239},{"key":247,"name":248,"field":239},{"key":250,"name":251,"field":239},{"key":253,"name":254,"field":239},{"key":256,"name":257,"field":239},{"key":276,"name_tr":277,"name_en":277,"sort":278,"specializations":279},"devops-cloud","DevOps \u002F Cloud",4,[280,281,284,287,290,293,296],{"key":218,"name":219,"field":276},{"key":282,"name":283,"field":276},"aws","AWS",{"key":285,"name":286,"field":276},"gcp","GCP",{"key":288,"name":289,"field":276},"azure","Azure",{"key":291,"name":292,"field":276},"kubernetes","Kubernetes",{"key":294,"name":295,"field":276},"terraform","Terraform",{"key":297,"name":298,"field":276},"linux","Linux",{"key":300,"name_tr":301,"name_en":301,"sort":302,"specializations":303},"ai-engineer","AI Engineer",5,[304,305,306,309],{"key":218,"name":219,"field":300},{"key":224,"name":225,"field":300},{"key":307,"name":308,"field":300},"llm-rag","LLM\u002FRAG",{"key":310,"name":311,"field":300},"mlops","MLOps",{"key":313,"name_tr":314,"name_en":315,"sort":316,"specializations":317},"database","Veritabanı","Database",6,[318,319,322,325,328],{"key":218,"name":219,"field":313},{"key":320,"name":321,"field":313},"postgresql","PostgreSQL",{"key":323,"name":324,"field":313},"mysql","MySQL",{"key":326,"name":327,"field":313},"mongodb","MongoDB",{"key":329,"name":330,"field":313},"redis","Redis",{"key":5,"name_tr":6,"name_en":332,"sort":333,"specializations":334},"Mobile",7,[335,336,337,338,339],{"key":218,"name":219,"field":5},{"key":121,"name":122,"field":5},{"key":114,"name":115,"field":5},{"key":118,"name":119,"field":5},{"key":124,"name":125,"field":5},{"key":341,"name_tr":342,"name_en":343,"sort":344,"specializations":345},"security","Güvenlik","Security",8,[346,347,350,353,356,359],{"key":218,"name":219,"field":341},{"key":348,"name":349,"field":341},"appsec","AppSec",{"key":351,"name":352,"field":341},"offensive-pentest","Offensive \u002F Pentest",{"key":354,"name":355,"field":341},"cloud-security","Cloud Security",{"key":357,"name":358,"field":341},"devsecops","DevSecOps",{"key":360,"name":361,"field":341},"blue-team-incident","Blue Team \u002F Incident",{"key":363,"name_tr":364,"name_en":365,"sort":366,"specializations":367},"qa-test-automation","QA \u002F Test Otomasyonu","QA \u002F Test Automation",9,[368],{"key":218,"name":219,"field":363},{"key":370,"name_tr":371,"name_en":371,"sort":372,"specializations":373},"data-engineer","Data Engineer",10,[374],{"key":218,"name":219,"field":370},{"key":376,"name_tr":377,"name_en":378,"sort":379,"specializations":380},"game-dev","Oyun Geliştirme","Game Development",11,[381],{"key":218,"name":219,"field":376},{"key":383,"name_tr":384,"name_en":384,"sort":385,"specializations":386},"ml-engineer","ML Engineer",12,[387],{"key":218,"name":219,"field":383},[14,15,16],{"junior":390,"mid":392,"senior":393},{"questions":391,"median_sec":3},20,{"questions":391,"median_sec":3},{"questions":391,"median_sec":3},[10,395],"en",[397,398],"google","github",21750,true]