[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"me":3,"catalog:en:backend\u002Fgo-concurrency":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","","go-concurrency","Go Concurrency","en",75,3300,[14,15,16],"junior","mid","senior",[18,21,24,27,30,33,36,39,42,45,48,49,52,55,58,61,64,67,70,73,76,79,82,85,88,91,94,97,100,103,106,109,112,115,118,121,124,127,130,133,136,139,142,145],{"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":8,"name":9,"count":11},{"key":50,"name":51,"count":11},"go-errors","Go Errors",{"key":53,"name":54,"count":11},"go-interfaces-generics","Go Interfaces Generics",{"key":56,"name":57,"count":11},"go-memory-performance","Go Memory Performance",{"key":59,"name":60,"count":11},"go-stdlib-http","Go Stdlib Http",{"key":62,"name":63,"count":11},"go-testing-tooling","Go Testing Tooling",{"key":65,"name":66,"count":11},"java-concurrency","Java Concurrency",{"key":68,"name":69,"count":11},"java-exceptions","Java Exceptions",{"key":71,"name":72,"count":11},"java-generics-interfaces","Java Generics Interfaces",{"key":74,"name":75,"count":11},"java-memory-jvm","Java Memory Jvm",{"key":77,"name":78,"count":11},"java-stdlib-http","Java Stdlib Http",{"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",[169,187,200,214,227,240],{"id":170,"topic":9,"difficulty":171,"body":172,"options":173,"correct_key":181,"explanation":186},"019f5b0c-5ae3-7db0-bfea-ce55208abef3",1,"```go\nfunc main() {\n\tgo fmt.Println(\"hello from goroutine\")\n}\n```\nWhat happens when this program runs?",[174,177,180,183],{"key":175,"text":176},"a","It always prints \"hello from goroutine\" before main exits",{"key":178,"text":179},"b","It blocks forever waiting for the goroutine to finish",{"key":181,"text":182},"c","main may return before the goroutine runs, so the print may never happen",{"key":184,"text":185},"d","The compiler rejects `go` on a call whose result is not used","`main` does not wait for other goroutines. When `main` returns, the process exits immediately, so a goroutine started just before that can easily never get scheduled. There is no implicit join, and `go fmt.Println(...)` compiles fine even though the return value is discarded.",{"id":188,"topic":9,"difficulty":171,"body":189,"options":190,"correct_key":178,"explanation":199},"019f5b0c-5aff-7937-8f7e-181adb8a7d06","What is the core semantic difference between an unbuffered channel and a buffered channel in Go?",[191,193,195,197],{"key":175,"text":192},"Unbuffered channels can only carry pointers, buffered channels can carry any type",{"key":178,"text":194},"An unbuffered send blocks until a receiver is ready; a buffered send blocks only once full",{"key":181,"text":196},"Buffered channels never block on send or receive",{"key":184,"text":198},"Unbuffered channels require a `select` statement, buffered channels do not","An unbuffered channel has no capacity, so a send synchronizes directly with a matching receive. A buffered channel lets a fixed number of values sit in the channel before a send blocks, decoupling sender and receiver timing up to that capacity.",{"id":201,"topic":9,"difficulty":202,"body":203,"options":204,"correct_key":175,"explanation":213},"019f5b0c-5b00-7e0c-b002-ded79252bae5",2,"```go\nch := make(chan int)\nclose(ch)\nv, ok := \u003C-ch\nfmt.Println(v, ok)\n```\nWhat does this print?",[205,207,209,211],{"key":175,"text":206},"0 false",{"key":178,"text":208},"It panics because the channel is closed",{"key":181,"text":210},"0 true",{"key":184,"text":212},"It blocks forever because there is no sender","Receiving from a closed channel never blocks and never panics. It immediately yields the zero value of the element type (0 for int) with `ok` set to false, signaling that the channel is closed and drained.",{"id":215,"topic":9,"difficulty":202,"body":216,"options":217,"correct_key":178,"explanation":226},"019f5b0c-5b01-7a5b-a274-82cd9ddc8db3","```go\nch := make(chan int, 2)\nclose(ch)\nch \u003C- 1\n```\nWhat happens when this code runs?",[218,220,222,224],{"key":175,"text":219},"It silently drops the value 1 since the channel is closed",{"key":178,"text":221},"It panics with \"send on closed channel\"",{"key":181,"text":223},"It succeeds because the buffer has room",{"key":184,"text":225},"It blocks forever waiting for a receiver","Sending on a closed channel always panics, regardless of remaining buffer capacity. Buffer space only matters for open channels; once `close` has been called, any further send is a programming error the runtime reports immediately.",{"id":228,"topic":9,"difficulty":202,"body":229,"options":230,"correct_key":184,"explanation":239},"019f5b0c-5b02-7647-9c5d-5ea86573fb67","```go\nvar ch chan int\n\u003C-ch\n```\nWhat is the behavior of the receive on the second line?",[231,233,235,237],{"key":175,"text":232},"It panics because `ch` was never initialized with `make`",{"key":178,"text":234},"It returns the zero value immediately, like a closed channel",{"key":181,"text":236},"It returns an error value describing the nil channel",{"key":184,"text":238},"It blocks forever, since a nil channel is never ready","`ch` is a nil channel (declared but never `make`'d). Operations on a nil channel block permanently rather than panicking or returning immediately — this is a common cause of goroutines that hang without any error message.",{"id":241,"topic":9,"difficulty":202,"body":242,"options":243,"correct_key":181,"explanation":252},"019f5b0c-5b03-776a-9c1b-c119475b2f52","```go\nch := make(chan int, 3)\nch \u003C- 1\nch \u003C- 2\nch \u003C- 3\nclose(ch)\nfor v := range ch {\n\tfmt.Println(v)\n}\n```\nWhat does this print?",[244,246,248,250],{"key":175,"text":245},"Only 1, then the loop panics because the channel is closed",{"key":178,"text":247},"1 2 3, and then it loops forever printing 0",{"key":181,"text":249},"1 2 3, and the loop exits once the channel drains",{"key":184,"text":251},"Nothing, because you cannot range over a closed channel","`range` over a channel receives values until the channel is both closed and empty, then the loop exits normally — no panic, no extra zero values. Since the buffer already holds 1, 2, 3 before `close`, the loop delivers all three and stops.",{"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":202,"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]