[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"me":3,"catalog:en:backend\u002Fphp-generics-interfaces":4,"config":252},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","","php-generics-interfaces","Php Generics Interfaces","en",75,3300,[14,15,16],"junior","mid","senior",[18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,115,118,121,124,127,130,133,136,139,142,145],{"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":79,"name":80,"count":11},"java-stdlib-http","Java Stdlib Http",{"key":82,"name":83,"count":11},"java-testing-tooling","Java Testing Tooling",{"key":85,"name":86,"count":11},"messaging-queues","Messaging \u002F Queues",{"key":88,"name":89,"count":11},"networking-http","Networking \u002F HTTP",{"key":91,"name":92,"count":11},"nodejs-error-handling","Nodejs Error Handling",{"key":94,"name":95,"count":11},"nodejs-event-loop-async","Nodejs Event Loop Async",{"key":97,"name":98,"count":11},"nodejs-memory-performance","Nodejs Memory Performance",{"key":100,"name":101,"count":11},"nodejs-modules-streams","Nodejs Modules Streams",{"key":103,"name":104,"count":11},"nodejs-stdlib-http","Nodejs Stdlib Http",{"key":106,"name":107,"count":11},"nodejs-testing-tooling","Nodejs Testing Tooling",{"key":109,"name":110,"count":11},"php-concurrency-async","Php Concurrency Async",{"key":112,"name":113,"count":11},"php-exceptions","Php Exceptions",{"key":8,"name":9,"count":11},{"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",[169,187,200,213,226,239],{"id":170,"topic":9,"difficulty":171,"body":172,"options":173,"correct_key":178,"explanation":186},"019f7281-524f-7cbb-88d8-35aa714638b4",1,"```php\ninterface Greetable {\n    public function greet(): string;\n}\n\nclass Person implements Greetable {\n}\n```\nWhat happens when this code is loaded?",[174,177,180,183],{"key":175,"text":176},"a","Nothing, PHP interfaces are optional hints and are ignored at runtime.",{"key":178,"text":179},"b","A fatal error occurs because `Person` does not implement the required `greet()` method.",{"key":181,"text":182},"c","`Person` compiles fine; `greet()` is auto-generated with an empty body.",{"key":184,"text":185},"d","A warning is printed but the class can still be instantiated normally.","A class implementing an interface must define every method the interface declares, or be declared abstract itself. Since `Person` implements `Greetable` without providing `greet()`, PHP raises a fatal error at class-definition time (\"Class Person contains 1 abstract method and must be declared abstract or implement the remaining methods\").",{"id":188,"topic":9,"difficulty":171,"body":189,"options":190,"correct_key":178,"explanation":199},"019f7281-5251-7107-8c0c-898c153e34ce","In PHP, can an abstract class be instantiated directly with `new`?",[191,193,195,197],{"key":175,"text":192},"Yes, as long as it has a public constructor.",{"key":178,"text":194},"No, attempting `new` on an abstract class always raises a fatal error.",{"key":181,"text":196},"Yes, but only if all its methods have implementations.",{"key":184,"text":198},"No, but it can be instantiated dynamically via reflection without restriction.","Abstract classes represent incomplete blueprints meant to be extended. PHP forbids instantiating them directly and throws a fatal error (\"Cannot instantiate abstract class\"), regardless of constructor visibility or whether every method happens to have a body.",{"id":201,"topic":9,"difficulty":171,"body":202,"options":203,"correct_key":184,"explanation":212},"019f7281-5259-7d50-94cc-563102276444","Which of the following can a plain PHP interface declare?",[204,206,208,210],{"key":175,"text":205},"Method signatures and typed instance properties.",{"key":178,"text":207},"Private methods with default implementations.",{"key":181,"text":209},"Static properties shared by all implementing classes.",{"key":184,"text":211},"Method signatures and class constants only.","Interfaces only declare method signatures (no body) and constants; they cannot declare instance or static properties. Implementation state always lives in the classes that implement the interface, never in the interface itself.",{"id":214,"topic":9,"difficulty":171,"body":215,"options":216,"correct_key":184,"explanation":225},"019f7281-525b-7647-9f74-85e830353d3d","You add a `Logger` trait to a `Service` class in your app:\n```php\ntrait Logger {\n    public function log(string $msg): void {\n        echo \"[LOG] $msg\";\n    }\n}\n\nclass Service {\n    use Logger;\n}\n\n(new Service())->log(\"ready\");\n```\nWhat is printed?",[217,219,221,223],{"key":175,"text":218},"Nothing, traits cannot be used inside classes without extends.",{"key":178,"text":220},"Fatal error: call to undefined method log().",{"key":181,"text":222},"LOG ready (without brackets).",{"key":184,"text":224},"[LOG] ready","`use Logger;` copies the trait's method bodies into `Service` as if they were written directly in the class. Calling `log()` on a `Service` instance therefore executes the trait's implementation and prints \"[LOG] ready\".",{"id":227,"topic":9,"difficulty":171,"body":228,"options":229,"correct_key":184,"explanation":238},"019f7281-5262-7d06-82de-9c83bb96a8da","What distinguishes a \"pure\" PHP enum from a \"backed\" enum?",[230,232,234,236],{"key":175,"text":231},"A pure enum can only have one case; a backed enum can have many.",{"key":178,"text":233},"A pure enum is declared with `class`; a backed enum is declared with `enum`.",{"key":181,"text":235},"A pure enum cannot implement interfaces; only backed enums can.",{"key":184,"text":237},"A pure enum's cases have no scalar value attached; a backed enum's cases each map to an int or string.","`enum Suit { case Hearts; }` defines a pure enum — cases are just named singleton instances. `enum Suit: string { case Hearts = 'H'; }` defines a backed enum, where each case additionally carries a scalar value accessible via `->value`. Both kinds can implement interfaces.",{"id":240,"topic":9,"difficulty":171,"body":241,"options":242,"correct_key":184,"explanation":251},"019f7281-5264-70f0-b605-c903393ff97e","```php\nclass Point {\n    public function __construct(\n        public readonly int $x,\n        public readonly int $y,\n    ) {}\n}\n\n$p = new Point(1, 2);\necho $p->x;\n```\nWhat is printed?",[243,245,247,249],{"key":175,"text":244},"2",{"key":178,"text":246},"Fatal error: cannot read readonly property.",{"key":181,"text":248},"Nothing, constructor promotion does not work with readonly.",{"key":184,"text":250},"1","Constructor property promotion combined with `readonly` declares and initializes $x and $y in one step. Reading a readonly property after it has been initialized works exactly like a normal property, so `$p->x` prints 1.",{"fields":253,"seniorities":424,"interview_shapes":425,"locales":430,"oauth":432,"question_count":435,"coach_enabled":436,"jd_match_enabled":436},[254,265,286,303,327,340,359,378,398,405,411,418],{"key":5,"name_tr":6,"name_en":6,"sort":171,"specializations":255},[256,259,260,261,262,263,264],{"key":257,"name":258,"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":266,"name_tr":267,"name_en":267,"sort":268,"specializations":269},"frontend","Frontend",2,[270,271,274,277,280,283],{"key":257,"name":258,"field":266},{"key":272,"name":273,"field":266},"javascript","JavaScript",{"key":275,"name":276,"field":266},"typescript","TypeScript",{"key":278,"name":279,"field":266},"react","React",{"key":281,"name":282,"field":266},"vue","Vue",{"key":284,"name":285,"field":266},"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":257,"name":258,"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":266},{"key":275,"name":276,"field":266},{"key":278,"name":279,"field":266},{"key":281,"name":282,"field":266},{"key":284,"name":285,"field":266},{"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":257,"name":258,"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":257,"name":258,"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":257,"name":258,"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":257,"name":258,"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":257,"name":258,"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":257,"name":258,"field":399},{"key":406,"name_tr":407,"name_en":407,"sort":408,"specializations":409},"data-engineer","Data Engineer",10,[410],{"key":257,"name":258,"field":406},{"key":412,"name_tr":413,"name_en":414,"sort":415,"specializations":416},"game-dev","Oyun Geliştirme","Game Development",11,[417],{"key":257,"name":258,"field":412},{"key":419,"name_tr":420,"name_en":420,"sort":421,"specializations":422},"ml-engineer","ML Engineer",12,[423],{"key":257,"name":258,"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]