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bu bilgi çalışma zamanı bytecode'unda bulunmaz.",{"key":181,"text":182},"c","JVM, generic tip parametrelerini runtime'da kontrol eder ve uyuşmazlıkta hata fırlatır.",{"key":184,"text":185},"d","Derleyici tam tip argümanını bytecode metadata'sı olarak saklar, böylece reflection her zaman doğrudan okuyabilir.","Java generics, type erasure ile uygulanır: derleyici derleme zamanında tip güvenliğini denetler, ardından tip parametrelerini siler ve üretilen bytecode'da bunların yerine sınırlarını (ya da Object'i) koyar. Bu yüzden generic tip bilgisi çoğunlukla runtime'da mevcut değildir.",{"id":188,"topic":9,"difficulty":171,"body":189,"options":190,"correct_key":184,"explanation":199},"019f6e5f-23e8-792b-88c3-8d989efcc307","`List list = new ArrayList();` şeklinde tip argümanı vermeden yazıyorsunuz. Bu raw type kullanımının riski nedir?",[191,193,195,197],{"key":175,"text":192},"Her açıdan `List\u003CObject>` ile tamamen aynı davranır, pratik bir fark yoktur.",{"key":178,"text":194},"Güncel Java sürümlerinde derleme hatasıdır, bu yüzden risk oluşmaz.",{"key":181,"text":196},"Yalnızca liste oluşturulduktan sonra boş bırakılırsa sorun çıkarır.",{"key":184,"text":198},"Derleyici artık o liste için eleman tipini kontrol edemez; runtime'da ClassCastException riski doğar.","Raw type'lar o değişken için generic tip kontrolünü devre dışı bırakır. Derleyici unchecked uyarısı verir; yanlış tip eklenen kod sorunsuz derlenebilir ama daha sonra bir eleman okunup cast edildiğinde ClassCastException ile patlayabilir.",{"id":201,"topic":9,"difficulty":171,"body":202,"options":203,"correct_key":175,"explanation":212},"019f6e5f-23e9-7891-b05f-933c8d62d7b4","```java\nclass Box\u003CT> {\n    private T value;\n    Box(T value) { this.value = value; }\n    T get() { return value; }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        Box\u003CString> box = new Box\u003C>(\"hello\");\n        System.out.println(box.get().length());\n    }\n}\n```\nBu program ne yazdırır?",[204,206,208,210],{"key":175,"text":205},"5",{"key":178,"text":207},"hello",{"key":181,"text":209},"Derleme hatası: generic tip T üzerinde length() çağrılamaz.",{"key":184,"text":211},"Runtime hatası: ClassCastException.","`Box\u003CString>` T'yi String'e bağlar, yani `box.get()` bir String döndürür ve \"hello\" üzerinde `.length()` çağırmak 5 verir. Generic tip çağrı noktasında tamamen çözüldüğü için bu kod sorunsuz derlenir ve çalışır.",{"id":214,"topic":9,"difficulty":215,"body":216,"options":217,"correct_key":181,"explanation":226},"019f6e5f-23ea-7727-8ea5-a12616294db9",2,"```java\nclass Pair\u003CT extends Comparable\u003CT>> {\n    T first, second;\n    Pair(T a, T b) { first = a; second = b; }\n    T max() { return first.compareTo(second) >= 0 ? first : second; }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        Pair\u003CInteger> p = new Pair\u003C>(3, 7);\n        System.out.println(p.max());\n    }\n}\n```\nBu ne yazdırır?",[218,220,222,224],{"key":175,"text":219},"3",{"key":178,"text":221},"Derleme hatası: Integer, `T extends Comparable\u003CT>` sınırını sağlamaz.",{"key":181,"text":223},"7",{"key":184,"text":225},"Runtime hatası: compareTo üzerinde NullPointerException.","Integer, Comparable\u003CInteger>'ı implemente eder ve sınırı sağlar, bu yüzden bu kod derlenir. `first.compareTo(second)` 3'ü 7 ile karşılaştırır, sonuç negatiftir, dolayısıyla `max()` `second`'ı, yani 7'yi döndürür.",{"id":228,"topic":9,"difficulty":171,"body":229,"options":230,"correct_key":175,"explanation":239},"019f6e5f-23eb-7412-a892-9e1c22bdb272","Java'da functional interface'i hangi ifade doğru tanımlar?",[231,233,235,237],{"key":175,"text":232},"Tam olarak bir soyut (abstract) metodu olan interface; default ve static metot sayısı sınırsız olabilir.",{"key":178,"text":234},"Default ve static metotlar dahil, toplamda tam olarak bir metodu olan interface.",{"key":181,"text":236},"Kod tabanının herhangi bir yerinde lambda ifadesiyle birlikte kullanılan herhangi bir interface.",{"key":184,"text":238},"Kaç tane soyut metot bildirdiğine bakılmaksızın `@FunctionalInterface` ile işaretlenmiş bir interface.","Functional interface, tam olarak bir soyut metoda sahiptir (lambda ya da metot referansının hedefi); default ve static metotlar bu sınıra dahil edilmez. `@FunctionalInterface` sadece bu kuralı zorlayan bir derleyici kontrolüdür — iki ya da daha fazla soyut metot varsa interface'i tek başına functional yapmaz.",{"id":241,"topic":9,"difficulty":215,"body":242,"options":243,"correct_key":184,"explanation":252},"019f6e5f-23eb-7ccf-a1d7-3fb071473d94","```java\nimport java.util.function.Predicate;\n\npublic class Main {\n    public static void main(String[] args) {\n        Predicate\u003CString> isLong = s -> s.length() > 3;\n        System.out.println(isLong.test(\"hi\"));\n    }\n}\n```\nNe yazdırılır?",[244,246,248,250],{"key":175,"text":245},"true",{"key":178,"text":247},"Derleme hatası: Predicate, süslü parantez içinde bir return ifadesi gerektirir.",{"key":181,"text":249},"2",{"key":184,"text":251},"false","`Predicate\u003CString>`, `boolean test(T t)` metodunu tanımlar. Lambda `\"hi\".length() > 3`, yani `2 > 3` kontrolünü yapar; bu false'tur.",{"fields":254,"seniorities":424,"interview_shapes":425,"locales":430,"oauth":432,"question_count":435,"coach_enabled":436,"jd_match_enabled":436},[255,266,286,303,327,340,359,378,398,405,411,418],{"key":5,"name_tr":6,"name_en":6,"sort":171,"specializations":256},[257,260,261,262,263,264,265],{"key":258,"name":259,"field":5},"general","Genel",{"key":154,"name":155,"field":5},{"key":166,"name":167,"field":5},{"key":157,"name":158,"field":5},{"key":150,"name":151,"field":5},{"key":160,"name":161,"field":5},{"key":163,"name":164,"field":5},{"key":267,"name_tr":268,"name_en":268,"sort":215,"specializations":269},"frontend","Frontend",[270,271,274,277,280,283],{"key":258,"name":259,"field":267},{"key":272,"name":273,"field":267},"javascript","JavaScript",{"key":275,"name":276,"field":267},"typescript","TypeScript",{"key":278,"name":279,"field":267},"react","React",{"key":281,"name":282,"field":267},"vue","Vue",{"key":284,"name":285,"field":267},"angular","Angular",{"key":287,"name_tr":288,"name_en":288,"sort":289,"specializations":290},"fullstack","Fullstack",3,[291,292,293,294,295,296,297,298,299,300,301,302],{"key":258,"name":259,"field":287},{"key":154,"name":155,"field":5},{"key":166,"name":167,"field":5},{"key":157,"name":158,"field":5},{"key":150,"name":151,"field":5},{"key":160,"name":161,"field":5},{"key":163,"name":164,"field":5},{"key":272,"name":273,"field":267},{"key":275,"name":276,"field":267},{"key":278,"name":279,"field":267},{"key":281,"name":282,"field":267},{"key":284,"name":285,"field":267},{"key":304,"name_tr":305,"name_en":305,"sort":306,"specializations":307},"devops-cloud","DevOps \u002F Cloud",4,[308,309,312,315,318,321,324],{"key":258,"name":259,"field":304},{"key":310,"name":311,"field":304},"aws","AWS",{"key":313,"name":314,"field":304},"gcp","GCP",{"key":316,"name":317,"field":304},"azure","Azure",{"key":319,"name":320,"field":304},"kubernetes","Kubernetes",{"key":322,"name":323,"field":304},"terraform","Terraform",{"key":325,"name":326,"field":304},"linux","Linux",{"key":328,"name_tr":329,"name_en":329,"sort":330,"specializations":331},"ai-engineer","AI Engineer",5,[332,333,334,337],{"key":258,"name":259,"field":328},{"key":166,"name":167,"field":328},{"key":335,"name":336,"field":328},"llm-rag","LLM\u002FRAG",{"key":338,"name":339,"field":328},"mlops","MLOps",{"key":341,"name_tr":342,"name_en":343,"sort":344,"specializations":345},"database","Veritabanı","Database",6,[346,347,350,353,356],{"key":258,"name":259,"field":341},{"key":348,"name":349,"field":341},"postgresql","PostgreSQL",{"key":351,"name":352,"field":341},"mysql","MySQL",{"key":354,"name":355,"field":341},"mongodb","MongoDB",{"key":357,"name":358,"field":341},"redis","Redis",{"key":360,"name_tr":361,"name_en":362,"sort":363,"specializations":364},"mobile","Mobil","Mobile",7,[365,366,369,372,375],{"key":258,"name":259,"field":360},{"key":367,"name":368,"field":360},"ios-swift","iOS (Swift)",{"key":370,"name":371,"field":360},"android-kotlin","Android (Kotlin)",{"key":373,"name":374,"field":360},"flutter","Flutter",{"key":376,"name":377,"field":360},"react-native","React Native",{"key":143,"name_tr":144,"name_en":379,"sort":380,"specializations":381},"Security",8,[382,383,386,389,392,395],{"key":258,"name":259,"field":143},{"key":384,"name":385,"field":143},"appsec","AppSec",{"key":387,"name":388,"field":143},"offensive-pentest","Offensive \u002F Pentest",{"key":390,"name":391,"field":143},"cloud-security","Cloud Security",{"key":393,"name":394,"field":143},"devsecops","DevSecOps",{"key":396,"name":397,"field":143},"blue-team-incident","Blue Team \u002F Incident",{"key":399,"name_tr":400,"name_en":401,"sort":402,"specializations":403},"qa-test-automation","QA \u002F Test Otomasyonu","QA \u002F Test Automation",9,[404],{"key":258,"name":259,"field":399},{"key":406,"name_tr":407,"name_en":407,"sort":408,"specializations":409},"data-engineer","Data Engineer",10,[410],{"key":258,"name":259,"field":406},{"key":412,"name_tr":413,"name_en":414,"sort":415,"specializations":416},"game-dev","Oyun Geliştirme","Game Development",11,[417],{"key":258,"name":259,"field":412},{"key":419,"name_tr":420,"name_en":420,"sort":421,"specializations":422},"ml-engineer","ML Engineer",12,[423],{"key":258,"name":259,"field":419},[14,15,16],{"junior":426,"mid":428,"senior":429},{"questions":427,"median_sec":3},20,{"questions":427,"median_sec":3},{"questions":427,"median_sec":3},[10,431],"en",[433,434],"google","github",21750,true]