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34 - Real interview 5 answers.html
34 - Real interview 5 answers.htmlDevOps Courses » UD-Kubernetes-Mastery-240-Key-Interview-Questions-2024 |
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| What is a Kubernetes Job and What is its Purpose? Answer: A Kubernetes Job is a resource used to manage a task that runs to completion, as opposed to long-running services. It is used for tasks like batch processing, data analysis, or batch computation that need to run once and complete successfully. Kubernetes ensures that a Job runs until the specified number of completions is achieved. How Does a Kubernetes Job Differ from a Pod? Answer: While a Pod in Kubernetes represents a single instance of a running process, a Job manages one or more Pods that are expected to terminate successfully (i.e., exit with a zero status). Pods created by a Job are meant to execute a specific task and then exit successfully, indicating the completion of the Job. What is a ReplicaSet in Kubernetes? Answer: A ReplicaSet in Kubernetes is a workload API object used to ensure that a specified number of pod replicas are running at any given time. It's primarily used to maintain the availability of a set of identical Pods. If there are not enough replicas, it creates more; if there are too many, it deletes some. How Does a ReplicaSet Differ from a ReplicationController? Answer: A ReplicaSet is the next-generation ReplicationController. The key difference is that ReplicaSets support set-based selector requirements as opposed to the equality-based selector requirements of ReplicationControllers. This means ReplicaSets can select a broader range of pods based on labels. What Happens if a Pod in a ReplicaSet Fails? Answer: If a pod in a ReplicaSet fails (due to a node failure or termination), the ReplicaSet notices the decrease in the number of replicas and creates a new pod to replace it. The new pod is created based on the pod template defined in the ReplicaSet. | ||||
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