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value to an attribute on the child's tag, and the child declares that name in its `props` option (or `defineProps`) to receive it.",{"id":170,"topic":9,"difficulty":153,"body":171,"options":172,"correct_key":163,"explanation":181},"019f7766-2f63-7785-85a9-d0dedb89d096","How does a child component notify its parent that something happened (e.g. a button was clicked)?",[173,175,177,179],{"key":157,"text":174},"By directly calling a method defined in the parent's `\u003Cscript>` block",{"key":160,"text":176},"By writing to `window` and letting the parent poll it",{"key":163,"text":178},"By emitting a custom event with `emit('event-name')`, which the parent listens to with `@event-name`",{"key":166,"text":180},"By returning a value from its `setup()` function","Vue's standard child-to-parent communication is custom events: the child calls `emit('event-name', payload)` (declared via `defineEmits`), and the parent listens with `@event-name=\"handler\"` on the child's tag.",{"id":183,"topic":9,"difficulty":184,"body":185,"options":186,"correct_key":157,"explanation":195},"019f7766-2f66-766b-bfd4-1d23ed7ee82f",2,"```vue\n\u003Cscript setup>\nconst props = defineProps({\n  count: { type: Number, default: 0 }\n})\n\u003C\u002Fscript>\n\u003Ctemplate>\n  \u003Cp>{{ count }}\u003C\u002Fp>\n\u003C\u002Ftemplate>\n```\nIf the parent does NOT pass a `count` prop, what is rendered?",[187,189,191,193],{"key":157,"text":188},"`0`, because the `default` value is used when the prop is omitted",{"key":160,"text":190},"`undefined`, since no default applies without explicit binding",{"key":163,"text":192},"A runtime error, since `count` is required by default",{"key":166,"text":194},"`NaN`, because `Number` types default to `NaN` when absent","Vue's prop options support a `default` value that is used whenever the caller doesn't pass that prop at all. Since `required` isn't set here, omitting `count` is valid and Vue falls back to `0`.",{"id":197,"topic":9,"difficulty":184,"body":198,"options":199,"correct_key":166,"explanation":208},"019f7766-2f68-7919-acfd-f5da155144f9","In a component's template, how should a prop named `userName` (camelCase) typically be written when passed from the parent's template?",[200,202,204,206],{"key":157,"text":201},"`UserName`, PascalCase always",{"key":160,"text":203},"`USER_NAME`, all caps",{"key":163,"text":205},"`userName`, camelCase must match exactly in templates too",{"key":166,"text":207},"`user-name`, kebab-case, since HTML attributes are case-insensitive","Because HTML attribute names are case-insensitive, Vue templates conventionally use kebab-case (`user-name`) for prop bindings even though the prop is declared in camelCase (`userName`) in the component's script. Vue automatically converts between the two.",{"id":210,"topic":9,"difficulty":184,"body":211,"options":212,"correct_key":163,"explanation":221},"019f7766-2f69-7986-bf93-37dc877f8510","```vue\n\u003C!-- Child.vue -->\n\u003Cscript setup>\nconst props = defineProps(['label'])\nprops.label = 'changed'\n\u003C\u002Fscript>\n```\nWhat happens when this line runs?",[213,215,217,219],{"key":157,"text":214},"It silently updates the parent's original value too, since props are shared by reference",{"key":160,"text":216},"It works normally — props are just regular reactive variables the child can freely reassign",{"key":163,"text":218},"Vue emits a runtime warning because props are meant to be one-way; mutating them directly is discouraged\u002Fdisallowed in dev mode",{"key":166,"text":220},"It throws a compile-time `TypeScript` error even in plain JavaScript projects","Props flow one-way from parent to child. Vue's reactivity system treats a component's own `props` object as effectively read-only from the child's side — mutating a prop directly triggers a dev-mode warning ('Avoid mutating a prop directly') since the change won't propagate back and creates a false impression of two-way binding.",{"id":223,"topic":9,"difficulty":184,"body":224,"options":225,"correct_key":160,"explanation":234},"019f7766-2f6a-7bc5-bc41-ece7a1fe4c1a","What does `defineEmits` do in a `\u003Cscript setup>` component?",[226,228,230,232],{"key":157,"text":227},"It defines the props the component accepts",{"key":160,"text":229},"It declares the component's public custom-event contract and optional event validation",{"key":163,"text":231},"It automatically emits every DOM event to the parent",{"key":166,"text":233},"It registers global event listeners on the `window` object","`defineEmits` is a compiler macro that declares a component's public custom-event contract, optionally with validator functions. Vue can then validate emitted events and IDEs\u002Ftype systems can provide accurate autocompletion and type checking. Calling `emit()` with an undeclared event is not a hard runtime prohibition; in development it can still run while Vue warns about the missing declaration.",{"fields":236,"seniorities":410,"interview_shapes":411,"locales":416,"oauth":418,"question_count":421,"coach_enabled":422,"jd_match_enabled":422},[237,262,270,287,311,324,343,362,384,391,397,404],{"key":238,"name_tr":239,"name_en":239,"sort":153,"specializations":240},"backend","Backend",[241,244,247,250,253,256,259],{"key":242,"name":243,"field":238},"general","Genel",{"key":245,"name":246,"field":238},"go","Go",{"key":248,"name":249,"field":238},"python","Python",{"key":251,"name":252,"field":238},"java","Java",{"key":254,"name":255,"field":238},"csharp","C#\u002F.NET",{"key":257,"name":258,"field":238},"nodejs","Node.js",{"key":260,"name":261,"field":238},"php","PHP",{"key":5,"name_tr":6,"name_en":6,"sort":184,"specializations":263},[264,265,266,267,268,269],{"key":242,"name":243,"field":5},{"key":139,"name":140,"field":5},{"key":145,"name":146,"field":5},{"key":142,"name":143,"field":5},{"key":148,"name":149,"field":5},{"key":135,"name":136,"field":5},{"key":271,"name_tr":272,"name_en":272,"sort":273,"specializations":274},"fullstack","Fullstack",3,[275,276,277,278,279,280,281,282,283,284,285,286],{"key":242,"name":243,"field":271},{"key":245,"name":246,"field":238},{"key":248,"name":249,"field":238},{"key":251,"name":252,"field":238},{"key":254,"name":255,"field":238},{"key":257,"name":258,"field":238},{"key":260,"name":261,"field":238},{"key":139,"name":140,"field":5},{"key":145,"name":146,"field":5},{"key":142,"name":143,"field":5},{"key":148,"name":149,"field":5},{"key":135,"name":136,"field":5},{"key":288,"name_tr":289,"name_en":289,"sort":290,"specializations":291},"devops-cloud","DevOps \u002F Cloud",4,[292,293,296,299,302,305,308],{"key":242,"name":243,"field":288},{"key":294,"name":295,"field":288},"aws","AWS",{"key":297,"name":298,"field":288},"gcp","GCP",{"key":300,"name":301,"field":288},"azure","Azure",{"key":303,"name":304,"field":288},"kubernetes","Kubernetes",{"key":306,"name":307,"field":288},"terraform","Terraform",{"key":309,"name":310,"field":288},"linux","Linux",{"key":312,"name_tr":313,"name_en":313,"sort":314,"specializations":315},"ai-engineer","AI Engineer",5,[316,317,318,321],{"key":242,"name":243,"field":312},{"key":248,"name":249,"field":312},{"key":319,"name":320,"field":312},"llm-rag","LLM\u002FRAG",{"key":322,"name":323,"field":312},"mlops","MLOps",{"key":325,"name_tr":326,"name_en":327,"sort":328,"specializations":329},"database","Veritabanı","Database",6,[330,331,334,337,340],{"key":242,"name":243,"field":325},{"key":332,"name":333,"field":325},"postgresql","PostgreSQL",{"key":335,"name":336,"field":325},"mysql","MySQL",{"key":338,"name":339,"field":325},"mongodb","MongoDB",{"key":341,"name":342,"field":325},"redis","Redis",{"key":344,"name_tr":345,"name_en":346,"sort":347,"specializations":348},"mobile","Mobil","Mobile",7,[349,350,353,356,359],{"key":242,"name":243,"field":344},{"key":351,"name":352,"field":344},"ios-swift","iOS (Swift)",{"key":354,"name":355,"field":344},"android-kotlin","Android (Kotlin)",{"key":357,"name":358,"field":344},"flutter","Flutter",{"key":360,"name":361,"field":344},"react-native","React Native",{"key":363,"name_tr":364,"name_en":365,"sort":366,"specializations":367},"security","Güvenlik","Security",8,[368,369,372,375,378,381],{"key":242,"name":243,"field":363},{"key":370,"name":371,"field":363},"appsec","AppSec",{"key":373,"name":374,"field":363},"offensive-pentest","Offensive \u002F Pentest",{"key":376,"name":377,"field":363},"cloud-security","Cloud Security",{"key":379,"name":380,"field":363},"devsecops","DevSecOps",{"key":382,"name":383,"field":363},"blue-team-incident","Blue Team \u002F Incident",{"key":385,"name_tr":386,"name_en":387,"sort":388,"specializations":389},"qa-test-automation","QA \u002F Test Otomasyonu","QA \u002F Test Automation",9,[390],{"key":242,"name":243,"field":385},{"key":392,"name_tr":393,"name_en":393,"sort":394,"specializations":395},"data-engineer","Data Engineer",10,[396],{"key":242,"name":243,"field":392},{"key":398,"name_tr":399,"name_en":400,"sort":401,"specializations":402},"game-dev","Oyun Geliştirme","Game Development",11,[403],{"key":242,"name":243,"field":398},{"key":405,"name_tr":406,"name_en":406,"sort":407,"specializations":408},"ml-engineer","ML Engineer",12,[409],{"key":242,"name":243,"field":405},[14,15,16],{"junior":412,"mid":414,"senior":415},{"questions":413,"median_sec":3},20,{"questions":413,"median_sec":3},{"questions":413,"median_sec":3},[417,10],"tr",[419,420],"google","github",21750,true]