[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"me":3,"catalog:en:devops-cloud\u002Fk8s-observability-troubleshooting":4,"config":256},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":151,"samples":171},"devops-cloud","DevOps \u002F Cloud","","k8s-observability-troubleshooting","K8s Observability Troubleshooting","en",75,3375,[14,15,16],"junior","mid","senior",[18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,91,94,97,100,103,106,109,112,115,118,121,124,127,130,133,136,139,142,145,148],{"key":19,"name":20,"count":11},"aws-compute-ec2-lambda","Aws Compute Ec2 Lambda",{"key":22,"name":23,"count":11},"aws-databases-rds-dynamodb","Aws Databases Rds Dynamodb",{"key":25,"name":26,"count":11},"aws-iam-security","Aws Iam Security",{"key":28,"name":29,"count":11},"aws-messaging-eventing","Aws Messaging Eventing",{"key":31,"name":32,"count":11},"aws-networking-vpc","Aws Networking Vpc",{"key":34,"name":35,"count":11},"aws-storage-s3-ebs","Aws Storage S3 Ebs",{"key":37,"name":38,"count":11},"azure-compute-vm-appservice","Azure Compute Vm Appservice",{"key":40,"name":41,"count":11},"azure-databases-sql-cosmosdb","Azure Databases Sql Cosmosdb",{"key":43,"name":44,"count":11},"azure-iam-security","Azure Iam Security",{"key":46,"name":47,"count":11},"azure-messaging-eventing","Azure Messaging Eventing",{"key":49,"name":50,"count":11},"azure-networking-vnet","Azure Networking Vnet",{"key":52,"name":53,"count":11},"azure-storage-blob-managed-disk","Azure Storage Blob Managed Disk",{"key":55,"name":56,"count":11},"ci-cd-pipelines","Ci Cd Pipelines",{"key":58,"name":59,"count":11},"cloud-architecture-scaling","Cloud Architecture Scaling",{"key":61,"name":62,"count":11},"containers-orchestration","Containers Orchestration",{"key":64,"name":65,"count":11},"deployment-release-strategies","Deployment Release Strategies",{"key":67,"name":68,"count":11},"gcp-compute-gce-cloudrun","Gcp Compute Gce Cloudrun",{"key":70,"name":71,"count":11},"gcp-databases-cloudsql-spanner-firestore","Gcp Databases Cloudsql Spanner Firestore",{"key":73,"name":74,"count":11},"gcp-iam-security","Gcp Iam Security",{"key":76,"name":77,"count":11},"gcp-messaging-eventing","Gcp Messaging Eventing",{"key":79,"name":80,"count":11},"gcp-networking-vpc","Gcp Networking Vpc",{"key":82,"name":83,"count":11},"gcp-storage-gcs-persistent-disk","Gcp Storage Gcs Persistent Disk",{"key":85,"name":86,"count":11},"infrastructure-as-code","Infrastructure As Code",{"key":88,"name":89,"count":11},"k8s-config-secrets","K8s Config Secrets",{"key":8,"name":9,"count":11},{"key":92,"name":93,"count":11},"k8s-scheduling-resources","K8s Scheduling Resources",{"key":95,"name":96,"count":11},"k8s-services-networking","K8s Services Networking",{"key":98,"name":99,"count":11},"k8s-storage","K8s Storage",{"key":101,"name":102,"count":11},"k8s-workloads","K8s Workloads",{"key":104,"name":105,"count":11},"linux-filesystem-permissions-links","Linux Filesystem Permissions Links",{"key":107,"name":108,"count":11},"linux-networking-tools-troubleshooting","Linux Networking Tools Troubleshooting",{"key":110,"name":111,"count":11},"linux-performance-monitoring-resource-limits","Linux Performance Monitoring Resource Limits",{"key":113,"name":114,"count":11},"linux-process-management-signals","Linux Process Management Signals",{"key":116,"name":117,"count":11},"linux-shell-scripting-ops-automation","Linux Shell Scripting Ops Automation",{"key":119,"name":120,"count":11},"linux-systemd-service-management","Linux Systemd Service Management",{"key":122,"name":123,"count":11},"networking-dns-loadbalancing","Networking Dns Loadbalancing",{"key":125,"name":126,"count":11},"observability-monitoring","Observability Monitoring",{"key":128,"name":129,"count":11},"reliability-incident-sre","Reliability Incident Sre",{"key":131,"name":132,"count":11},"security-iam-secrets","Security Iam Secrets",{"key":134,"name":135,"count":11},"terraform-hcl-language-expressions","Terraform Hcl Language Expressions",{"key":137,"name":138,"count":11},"terraform-modules-workspaces","Terraform Modules Workspaces",{"key":140,"name":141,"count":11},"terraform-plan-apply-drift-import","Terraform Plan Apply Drift Import",{"key":143,"name":144,"count":11},"terraform-providers-lifecycle-provisioners","Terraform Providers Lifecycle Provisioners",{"key":146,"name":147,"count":11},"terraform-state-backend-locking","Terraform State Backend Locking",{"key":149,"name":150,"count":11},"terraform-testing-policy-cicd","Terraform Testing Policy Cicd",[152,156,159,162,165,168],{"key":153,"name":154,"count":155},"aws","AWS",450,{"key":157,"name":158,"count":155},"azure","Azure",{"key":160,"name":161,"count":155},"gcp","GCP",{"key":163,"name":164,"count":155},"kubernetes","Kubernetes",{"key":166,"name":167,"count":155},"linux","Linux",{"key":169,"name":170,"count":155},"terraform","Terraform",[172,190,203,217,230,243],{"id":173,"topic":9,"difficulty":174,"body":175,"options":176,"correct_key":181,"explanation":189},"019f651a-7d1f-7eff-a208-3f51e54d9a3f",1,"In Kubernetes, what does the Pod phase `Running` actually guarantee?",[177,180,183,186],{"key":178,"text":179},"a","All containers in the Pod have passed their readiness checks",{"key":181,"text":182},"b","At least one container has been created and is executing",{"key":184,"text":185},"c","The Pod has been added to every Service's Endpoints that selects it",{"key":187,"text":188},"d","The Pod's containers have never restarted since creation","`Running` only means the Pod has been scheduled and at least one container is up; it says nothing about readiness — a Pod can be `Running` with `READY 0\u002F1` if a container fails its readiness probe.",{"id":191,"topic":9,"difficulty":174,"body":192,"options":193,"correct_key":187,"explanation":202},"019f651a-7d20-7867-ba99-1619d18e021b","```\n$ kubectl get pod crash-pod\nNAME        READY   STATUS             RESTARTS      AGE\ncrash-pod   0\u002F1     CrashLoopBackOff   4 (37s ago)   3m\n```\nWhat does the `CrashLoopBackOff` status mean here?",[194,196,198,200],{"key":178,"text":195},"The Pod could not be scheduled onto any Node in the cluster",{"key":181,"text":197},"The container's image could not be pulled from the registry",{"key":184,"text":199},"The Pod is waiting for a PersistentVolumeClaim to be bound",{"key":187,"text":201},"The container keeps crashing shortly after each restart","CrashLoopBackOff means the container has crashed repeatedly and restartPolicy is causing kubelet to retry, but with a growing back-off delay between attempts rather than restarting instantly each time.",{"id":204,"topic":9,"difficulty":205,"body":206,"options":207,"correct_key":178,"explanation":216},"019f651a-7d21-73de-83d8-dfc2b51092bf",2,"A Pod's only container is defined with `command: [\"sh\", \"-c\", \"exit 1\"]` and `restartPolicy: Always` (the default). What happens right after the Pod is created?",[208,210,212,214],{"key":178,"text":209},"It exits immediately with a non-zero code; kubelet restarts it, showing `CrashLoopBackOff`",{"key":181,"text":211},"The Pod stays in `Pending` because the command is invalid",{"key":184,"text":213},"The container starts once, exits, and the Pod phase becomes `Succeeded` since the command ran to completion",{"key":187,"text":215},"kubectl rejects the manifest at apply time because the command has no long-running process","Exiting with a non-zero code counts as a failure regardless of how quickly it happens; with `restartPolicy: Always` kubelet keeps restarting the container, and after a few consecutive failures the status shown becomes `CrashLoopBackOff`.",{"id":218,"topic":9,"difficulty":205,"body":219,"options":220,"correct_key":184,"explanation":229},"019f651a-7d21-7d52-91a2-78274e5b0268","```\n$ kubectl describe pod oom-pod\n    ...\n    Last State:     Terminated\n      Reason:       OOMKilled\n    Restart Count:  3\n```\nWhat does `Reason: OOMKilled` tell you about why the container was terminated?",[221,223,225,227],{"key":178,"text":222},"The container's liveness probe failed three times in a row",{"key":181,"text":224},"The node ran out of disk space while pulling the container's image",{"key":184,"text":226},"The container exceeded its configured memory limit and was killed",{"key":187,"text":228},"The container's process exited on its own with code 0","OOMKilled is reported when the container exceeds its memory `limit`; the kernel's out-of-memory killer terminates the process, and kubelet reports this specific reason rather than a generic non-zero exit.",{"id":231,"topic":9,"difficulty":174,"body":232,"options":233,"correct_key":181,"explanation":242},"019f651a-7d22-75af-9505-4da99f5391e0","What happens when a container's liveness probe fails repeatedly (past its `failureThreshold`)?",[234,236,238,240],{"key":178,"text":235},"The Pod is removed from all Service Endpoints, but the container keeps running unchanged",{"key":181,"text":237},"kubelet kills the container and restarts it according to the Pod's restart policy",{"key":184,"text":239},"The Pod is deleted and rescheduled onto a different Node",{"key":187,"text":241},"Kubernetes marks the Node as unschedulable","A failing liveness probe tells kubelet the container is unhealthy and should be restarted; kubelet kills the container and starts a new instance in place, which increments the Pod's restart count.",{"id":244,"topic":9,"difficulty":205,"body":245,"options":246,"correct_key":187,"explanation":255},"019f651a-7d22-7e95-a0e8-d9cdb5deef9e","A readinessProbe keeps failing on a Pod behind a Service:\n```\n$ kubectl get pod readiness-fail-pod\nNAME                 READY   STATUS    RESTARTS   AGE\nreadiness-fail-pod   0\u002F1     Running   0          40s\n\n$ kubectl get endpoints readiness-demo-svc\nNAME                 ENDPOINTS   AGE\nreadiness-demo-svc               40s\n```\nWhat best explains this output?",[247,249,251,253],{"key":178,"text":248},"The container has crashed and kubelet is about to restart it",{"key":181,"text":250},"The Pod failed to be scheduled onto a Node",{"key":184,"text":252},"The Service's label selector does not match the Pod's labels at all",{"key":187,"text":254},"The container is running but removed from the Service's Endpoints","A failing readiness probe only affects traffic routing: the Pod stays `Running` with `RESTARTS 0`, but kubelet marks it not-ready, so the endpoint controller removes it from the Service's Endpoints until it passes again.",{"fields":257,"seniorities":429,"interview_shapes":430,"locales":435,"oauth":437,"question_count":440,"coach_enabled":441,"jd_match_enabled":441},[258,283,303,320,330,343,362,381,403,410,416,423],{"key":259,"name_tr":260,"name_en":260,"sort":174,"specializations":261},"backend","Backend",[262,265,268,271,274,277,280],{"key":263,"name":264,"field":259},"general","Genel",{"key":266,"name":267,"field":259},"go","Go",{"key":269,"name":270,"field":259},"python","Python",{"key":272,"name":273,"field":259},"java","Java",{"key":275,"name":276,"field":259},"csharp","C#\u002F.NET",{"key":278,"name":279,"field":259},"nodejs","Node.js",{"key":281,"name":282,"field":259},"php","PHP",{"key":284,"name_tr":285,"name_en":285,"sort":205,"specializations":286},"frontend","Frontend",[287,288,291,294,297,300],{"key":263,"name":264,"field":284},{"key":289,"name":290,"field":284},"javascript","JavaScript",{"key":292,"name":293,"field":284},"typescript","TypeScript",{"key":295,"name":296,"field":284},"react","React",{"key":298,"name":299,"field":284},"vue","Vue",{"key":301,"name":302,"field":284},"angular","Angular",{"key":304,"name_tr":305,"name_en":305,"sort":306,"specializations":307},"fullstack","Fullstack",3,[308,309,310,311,312,313,314,315,316,317,318,319],{"key":263,"name":264,"field":304},{"key":266,"name":267,"field":259},{"key":269,"name":270,"field":259},{"key":272,"name":273,"field":259},{"key":275,"name":276,"field":259},{"key":278,"name":279,"field":259},{"key":281,"name":282,"field":259},{"key":289,"name":290,"field":284},{"key":292,"name":293,"field":284},{"key":295,"name":296,"field":284},{"key":298,"name":299,"field":284},{"key":301,"name":302,"field":284},{"key":5,"name_tr":6,"name_en":6,"sort":321,"specializations":322},4,[323,324,325,326,327,328,329],{"key":263,"name":264,"field":5},{"key":153,"name":154,"field":5},{"key":160,"name":161,"field":5},{"key":157,"name":158,"field":5},{"key":163,"name":164,"field":5},{"key":169,"name":170,"field":5},{"key":166,"name":167,"field":5},{"key":331,"name_tr":332,"name_en":332,"sort":333,"specializations":334},"ai-engineer","AI Engineer",5,[335,336,337,340],{"key":263,"name":264,"field":331},{"key":269,"name":270,"field":331},{"key":338,"name":339,"field":331},"llm-rag","LLM\u002FRAG",{"key":341,"name":342,"field":331},"mlops","MLOps",{"key":344,"name_tr":345,"name_en":346,"sort":347,"specializations":348},"database","Veritabanı","Database",6,[349,350,353,356,359],{"key":263,"name":264,"field":344},{"key":351,"name":352,"field":344},"postgresql","PostgreSQL",{"key":354,"name":355,"field":344},"mysql","MySQL",{"key":357,"name":358,"field":344},"mongodb","MongoDB",{"key":360,"name":361,"field":344},"redis","Redis",{"key":363,"name_tr":364,"name_en":365,"sort":366,"specializations":367},"mobile","Mobil","Mobile",7,[368,369,372,375,378],{"key":263,"name":264,"field":363},{"key":370,"name":371,"field":363},"ios-swift","iOS (Swift)",{"key":373,"name":374,"field":363},"android-kotlin","Android (Kotlin)",{"key":376,"name":377,"field":363},"flutter","Flutter",{"key":379,"name":380,"field":363},"react-native","React Native",{"key":382,"name_tr":383,"name_en":384,"sort":385,"specializations":386},"security","Güvenlik","Security",8,[387,388,391,394,397,400],{"key":263,"name":264,"field":382},{"key":389,"name":390,"field":382},"appsec","AppSec",{"key":392,"name":393,"field":382},"offensive-pentest","Offensive \u002F Pentest",{"key":395,"name":396,"field":382},"cloud-security","Cloud Security",{"key":398,"name":399,"field":382},"devsecops","DevSecOps",{"key":401,"name":402,"field":382},"blue-team-incident","Blue Team \u002F Incident",{"key":404,"name_tr":405,"name_en":406,"sort":407,"specializations":408},"qa-test-automation","QA \u002F Test Otomasyonu","QA \u002F Test Automation",9,[409],{"key":263,"name":264,"field":404},{"key":411,"name_tr":412,"name_en":412,"sort":413,"specializations":414},"data-engineer","Data Engineer",10,[415],{"key":263,"name":264,"field":411},{"key":417,"name_tr":418,"name_en":419,"sort":420,"specializations":421},"game-dev","Oyun Geliştirme","Game Development",11,[422],{"key":263,"name":264,"field":417},{"key":424,"name_tr":425,"name_en":425,"sort":426,"specializations":427},"ml-engineer","ML Engineer",12,[428],{"key":263,"name":264,"field":424},[14,15,16],{"junior":431,"mid":433,"senior":434},{"questions":432,"median_sec":3},20,{"questions":432,"median_sec":3},{"questions":432,"median_sec":3},[436,10],"tr",[438,439],"google","github",21750,true]