Exam KCNA Topic 3 Question 78 Discussion

To stream logs in real time with kubectl, you use the follow option -f, so D is correct. In Kubernetes, kubectl logs retrieves logs from containers in a Pod. By default, it returns the current log output and exits. When you add -f, kubectl keeps the connection open and continuously prints new log lines as they are produced, similar to tail -f on Linux. This is especially useful for debugging live behavior, watching startup sequences, or monitoring an application during a rollout.
The other flags serve different purposes. -p (as seen in option A) requests logs from the previous instance of a container (useful after a restart/crash), not real-time streaming. -c (option B) selects a specific container within a multi-container Pod; it doesn't stream by itself (though it can be combined with -f). -l (option C) is used with kubectl logs to select Pods by label, but again it is not the streaming flag; streaming requires -f.
In real troubleshooting, you commonly combine flags, e.g. kubectl logs -f pod-name -c container-name for streaming logs from a specific container, or kubectl logs -f -l app=myapp to stream from Pods matching a label selector (depending on kubectl behavior/version). But the key answer to "display logs in real time" is the follow flag: -f.
Therefore, the correct selection is D.