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NEW QUESTION # 66
How can you extend the Kubernetes API?
Answer: D
Explanation:
The Kubernetes API can be extended by adding CustomResourceDefinitions (CRDs) or by implementing an aggregation layer to serve additional APIs.
NEW QUESTION # 67
Why is Cloud-Native Architecture important?
Answer: A
Explanation:
Cloud-native architecture is important because it enables organizations to build and run software in a way that supports rapid innovation while maintaining reliability, scalability, and efficient operations. Option B best captures this: cloud native removes constraints to rapid innovation, so B is correct.
In traditional environments, innovation is slowed by heavyweight release processes, tightly coupled systems, manual operations, and limited elasticity. Cloud-native approaches-containers, declarative APIs, automation, and microservices-friendly patterns-reduce those constraints. Kubernetes exemplifies this by offering a consistent deployment model, self-healing, automated rollouts, scaling primitives, and a large ecosystem of delivery and observability tools. This makes it easier to ship changes more frequently and safely: teams can iterate quickly, roll back confidently, and standardize operations across environments.
Option A is partly descriptive (containers/microservices/pipelines are common in cloud native), but it doesn't explain why it matters; it lists ingredients rather than the benefit. Option C is vague ("modern") and again doesn't capture the core value proposition. Option D is incorrect because cloud native is not primarily about being "bleeding edge"-it's about proven practices that improve time-to-market and operational stability.
A good way to interpret "removes constraints" is: cloud native shifts the bottleneck away from infrastructure friction. With automation (IaC/GitOps), standardized runtime packaging (containers), and platform capabilities (Kubernetes controllers), teams spend less time on repetitive manual work and more time delivering features. Combined with observability and policy automation, this results in faster delivery with better reliability-exactly the reason cloud-native architecture is emphasized across the Kubernetes ecosystem.
NEW QUESTION # 68
How does service logical group set of pods?
Answer: B
Explanation:
https://kubernetes.io/docs/concepts/services-networking/service/
NEW QUESTION # 69
What is the Kubernetes object used for running a recurring workload?
Answer: B
Explanation:
A recurring workload in Kubernetes is implemented with a CronJob, so the correct choice is D. A CronJob is a controller that creates Jobs on a schedule defined in standard cron format (minute, hour, day of month, month, day of week). This makes CronJobs ideal for periodic tasks like backups, report generation, log rotation, and cleanup tasks.
A Job (option A) is run-to-completion but is typically a one-time execution; it ensures that a specified number of Pods successfully terminate. You can use a Job repeatedly, but something else must create it each time-CronJob is that built-in scheduler. Option B ("Batch") is not a standard workload resource type (batch is an API group, not the object name used here). Option C (DaemonSet) ensures one Pod runs on every node (or selected nodes), which is not "recurring," it's "always present per node." CronJobs include operational controls that matter in real clusters. For example, concurrencyPolicy controls what happens if a scheduled run overlaps with a previous run (Allow, Forbid, Replace). startingDeadlineSeconds can handle missed schedules (e.g., if the controller was down). History limits (successfulJobsHistoryLimit, failedJobsHistoryLimit) help manage cleanup and troubleshooting. Each scheduled execution results in a Job with its own Pods, which can be inspected with kubectl get jobs and kubectl logs.
So the correct Kubernetes object for a recurring workload is CronJob (D): it provides native scheduling and creates Jobs automatically according to the defined cadence.
NEW QUESTION # 70
What is the core metric type in Prometheus used to represent a single numerical value that can go up and down?
Answer: A
Explanation:
In Prometheus, a Gauge represents a single numerical value that can increase and decrease over time, which makes D the correct answer. Gauges are used for values like current memory usage, number of in-flight requests, queue depth, temperature, or CPU usage-anything that can move up and down.
This contrasts with a Counter, which is strictly monotonically increasing (it only goes up, except for resets when a process restarts). Counters are ideal for cumulative totals like total HTTP requests served, total errors, or bytes transmitted. Histograms and Summaries are used to capture distributions (often latency distributions), providing bucketed counts (histogram) or quantile approximations (summary), and are not the "single value that goes up and down" primitive the question asks for.
In Kubernetes observability, metrics are a primary signal for understanding system health and performance.
Prometheus is widely used to scrape metrics from Kubernetes components (kubelet, API server, controller- manager), cluster add-ons, and applications. Gauges are common for resource utilization metrics and for instantaneous states, such as container_memory_working_set_bytes or go_goroutines.
When you build alerting and dashboards, selecting the right metric type matters. For example, if you want to alert on the current memory usage, a gauge is appropriate. If you want to compute request rates, you typically use counters with Prometheus functions like rate() to derive per-second rates. Histograms and summaries are used when you need latency percentiles or distribution analysis.
So, for "a single numerical value that can go up and down," the correct Prometheus metric type is Gauge (D).
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NEW QUESTION # 71
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