[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"me":3,"catalog:en:backend\u002Fjava-stdlib-http":4,"config":253},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":148,"samples":168},"backend","Backend","","java-stdlib-http","Java Stdlib Http","en",75,3300,[14,15,16],"junior","mid","senior",[18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,79,82,85,88,91,94,97,100,103,106,109,112,115,118,121,124,127,130,133,136,139,142,145],{"key":19,"name":20,"count":11},"api-design","API Design",{"key":22,"name":23,"count":11},"caching","Caching",{"key":25,"name":26,"count":11},"concurrency","Concurrency",{"key":28,"name":29,"count":11},"csharp-concurrency-async","Csharp Concurrency Async",{"key":31,"name":32,"count":11},"csharp-exceptions","Csharp Exceptions",{"key":34,"name":35,"count":11},"csharp-generics-interfaces","Csharp Generics Interfaces",{"key":37,"name":38,"count":11},"csharp-memory-performance","Csharp Memory Performance",{"key":40,"name":41,"count":11},"csharp-stdlib-http","Csharp Stdlib Http",{"key":43,"name":44,"count":11},"csharp-testing-tooling","Csharp Testing Tooling",{"key":46,"name":47,"count":11},"databases-sql","Databases \u002F SQL",{"key":49,"name":50,"count":11},"go-concurrency","Go Concurrency",{"key":52,"name":53,"count":11},"go-errors","Go Errors",{"key":55,"name":56,"count":11},"go-interfaces-generics","Go Interfaces Generics",{"key":58,"name":59,"count":11},"go-memory-performance","Go Memory Performance",{"key":61,"name":62,"count":11},"go-stdlib-http","Go Stdlib Http",{"key":64,"name":65,"count":11},"go-testing-tooling","Go Testing Tooling",{"key":67,"name":68,"count":11},"java-concurrency","Java Concurrency",{"key":70,"name":71,"count":11},"java-exceptions","Java Exceptions",{"key":73,"name":74,"count":11},"java-generics-interfaces","Java Generics Interfaces",{"key":76,"name":77,"count":11},"java-memory-jvm","Java Memory Jvm",{"key":8,"name":9,"count":11},{"key":80,"name":81,"count":11},"java-testing-tooling","Java Testing Tooling",{"key":83,"name":84,"count":11},"messaging-queues","Messaging \u002F Queues",{"key":86,"name":87,"count":11},"networking-http","Networking \u002F HTTP",{"key":89,"name":90,"count":11},"nodejs-error-handling","Nodejs Error Handling",{"key":92,"name":93,"count":11},"nodejs-event-loop-async","Nodejs Event Loop Async",{"key":95,"name":96,"count":11},"nodejs-memory-performance","Nodejs Memory Performance",{"key":98,"name":99,"count":11},"nodejs-modules-streams","Nodejs Modules Streams",{"key":101,"name":102,"count":11},"nodejs-stdlib-http","Nodejs Stdlib Http",{"key":104,"name":105,"count":11},"nodejs-testing-tooling","Nodejs Testing Tooling",{"key":107,"name":108,"count":11},"php-concurrency-async","Php Concurrency Async",{"key":110,"name":111,"count":11},"php-exceptions","Php Exceptions",{"key":113,"name":114,"count":11},"php-generics-interfaces","Php Generics Interfaces",{"key":116,"name":117,"count":11},"php-memory-performance","Php Memory Performance",{"key":119,"name":120,"count":11},"php-stdlib-http","Php Stdlib Http",{"key":122,"name":123,"count":11},"php-testing-tooling","Php Testing Tooling",{"key":125,"name":126,"count":11},"python-concurrency-async","Python Concurrency Async",{"key":128,"name":129,"count":11},"python-errors-context","Python Errors Context",{"key":131,"name":132,"count":11},"python-memory-performance","Python Memory Performance",{"key":134,"name":135,"count":11},"python-stdlib-http","Python Stdlib Http",{"key":137,"name":138,"count":11},"python-testing-tooling","Python Testing Tooling",{"key":140,"name":141,"count":11},"python-typing-oop","Python Typing Oop",{"key":143,"name":144,"count":11},"security","Security",{"key":146,"name":147,"count":11},"testing","Testing",[149,153,156,159,162,165],{"key":150,"name":151,"count":152},"csharp","C#\u002F.NET",450,{"key":154,"name":155,"count":152},"go","Go",{"key":157,"name":158,"count":152},"java","Java",{"key":160,"name":161,"count":152},"nodejs","Node.js",{"key":163,"name":164,"count":152},"php","PHP",{"key":166,"name":167,"count":152},"python","Python",[169,187,201,214,227,240],{"id":170,"topic":9,"difficulty":171,"body":172,"options":173,"correct_key":178,"explanation":186},"019f6e5f-241b-7952-b8bd-1b644ec16486",1,"Which statement about `ArrayList` vs `LinkedList` in Java is correct?",[174,177,180,183],{"key":175,"text":176},"a","LinkedList gives O(1) random access via get(index), same as ArrayList.",{"key":178,"text":179},"b","ArrayList gives O(1) random access via get(index), while LinkedList must walk the list node by node for get(index).",{"key":181,"text":182},"c","ArrayList is a doubly linked list internally, so insertion at the head is O(1).",{"key":184,"text":185},"d","Both classes store elements in a fixed-size array, so neither can grow beyond its initial capacity.","ArrayList is backed by a resizable array, so get(index) is a direct array access — O(1). LinkedList is a doubly linked list, so get(index) must traverse from the head or tail depending on which is closer — O(n) in the worst case. Insertion at the head is cheap for LinkedList (O(1)) but expensive for ArrayList (O(n), shifting elements).",{"id":188,"topic":9,"difficulty":189,"body":190,"options":191,"correct_key":181,"explanation":200},"019f6e5f-241c-71f2-a653-60e14586d25c",2,"What is a key behavioral difference between `HashSet` and `TreeSet`?",[192,194,196,198],{"key":175,"text":193},"HashSet keeps elements sorted by natural order; TreeSet keeps insertion order.",{"key":178,"text":195},"TreeSet allows duplicate elements while HashSet does not.",{"key":181,"text":197},"TreeSet keeps elements in sorted order (via `Comparable` or a supplied `Comparator`), while HashSet gives no ordering guarantee.",{"key":184,"text":199},"HashSet requires elements to implement `Comparable`, while TreeSet does not.","TreeSet is backed by a red-black tree and maintains elements in sorted order according to their natural ordering (Comparable) or a Comparator passed to its constructor. HashSet is backed by a HashMap and gives no ordering guarantee at all — iteration order depends on hash bucket layout. Both sets reject duplicates (per equals\u002FhashCode or compareTo==0). It's TreeSet, not HashSet, that needs Comparable or a Comparator to order elements.",{"id":202,"topic":9,"difficulty":189,"body":203,"options":204,"correct_key":175,"explanation":213},"019f6e5f-241d-7562-a0d1-4bf15c65c405","You need a `Map` that preserves insertion order when iterating over its entries, without sorting. Which implementation fits best?",[205,207,209,211],{"key":175,"text":206},"LinkedHashMap, since it maintains a doubly linked list of entries in insertion order alongside the hash table.",{"key":178,"text":208},"TreeMap, since it always iterates in the order elements were inserted.",{"key":181,"text":210},"HashMap, since Java guarantees insertion order for all Map implementations since Java 8.",{"key":184,"text":212},"Any Map implementation works identically here, since Map never has a defined iteration order.","LinkedHashMap extends HashMap and additionally maintains a doubly linked list running through all its entries, so iteration order matches insertion order (or access order, if configured). TreeMap sorts by key according to Comparable\u002FComparator, not insertion order. Plain HashMap gives no iteration order guarantee at all — this was never changed in Java 8.",{"id":215,"topic":9,"difficulty":189,"body":216,"options":217,"correct_key":178,"explanation":226},"019f6e5f-241d-7dbe-8f1e-9713809d4f89","```java\nclass Employee implements Comparable\u003CEmployee> {\n    String name;\n    int age;\n\n    Employee(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    @Override\n    public int compareTo(Employee other) {\n        return Integer.compare(this.age, other.age);\n    }\n}\n\nList\u003CEmployee> list = new ArrayList\u003C>(List.of(\n    new Employee(\"Ana\", 35),\n    new Employee(\"Bo\", 22),\n    new Employee(\"Cy\", 29)\n));\nCollections.sort(list);\nSystem.out.println(list.get(0).name);\n```\nWhat does this print?",[218,220,222,224],{"key":175,"text":219},"Ana",{"key":178,"text":221},"Bo",{"key":181,"text":223},"Cy",{"key":184,"text":225},"It throws a ClassCastException because Employee does not override equals().","compareTo compares by age using Integer.compare, so Collections.sort(list) orders the employees ascending by age: Bo (22), Cy (29), Ana (35). After sorting, list.get(0) is Bo. Comparable does not require overriding equals() to be used correctly by Collections.sort — no ClassCastException occurs here.",{"id":228,"topic":9,"difficulty":189,"body":229,"options":230,"correct_key":181,"explanation":239},"019f6e5f-241e-77c9-8414-bc2aa0b584b4","```java\nList\u003CString> words = new ArrayList\u003C>(List.of(\"banana\", \"fig\", \"apple\", \"kiwi\"));\nwords.sort(Comparator.comparing(String::length).thenComparing(Comparator.naturalOrder()));\nSystem.out.println(words);\n```\nWhat does this print?",[231,233,235,237],{"key":175,"text":232},"[apple, banana, fig, kiwi]",{"key":178,"text":234},"[banana, apple, fig, kiwi]",{"key":181,"text":236},"[fig, kiwi, apple, banana]",{"key":184,"text":238},"[kiwi, fig, banana, apple]","Comparator.comparing(String::length) sorts primarily by string length: fig(3), kiwi(4), apple(5), banana(6). thenComparing(naturalOrder()) is only a tie-breaker for equal lengths, and no two words share a length here, so it has no effect. The result is [fig, kiwi, apple, banana].",{"id":241,"topic":9,"difficulty":171,"body":242,"options":243,"correct_key":184,"explanation":252},"019f6e5f-241f-7007-9ff9-ae20537e337d","```java\nList\u003CInteger> nums = List.of(1, 2, 3);\nnums.add(4);\n```\nWhat happens when this runs?",[244,246,248,250],{"key":175,"text":245},"It compiles fine and quietly adds 4 to the underlying list.",{"key":178,"text":247},"It compiles but silently ignores the add call.",{"key":181,"text":249},"It throws a ClassCastException at runtime.",{"key":184,"text":251},"It throws an UnsupportedOperationException at runtime.","List.of(...) returns an immutable list implementation. Any structural modification method (add, remove, set, clear) throws UnsupportedOperationException at runtime — the code compiles fine since List still declares add(), but the immutable implementation refuses the call.",{"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":189,"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":379,"name_en":144,"sort":380,"specializations":381},"Güvenlik",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},[431,10],"tr",[433,434],"google","github",21750,true]