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Issue description: The guided exercises gives a oc command to exec in a deployment. Even if the command works for some reason does it qualify to be used as best practice ? 

https://kubernetes.io/docs/reference/kubectl/generated/kubectl_exec/#examples 

I dont think this is a best practice because of ambiguity, permissions, replicas, transitioning issues . FOr example : 

• A deployment may have multiple replicas (pods). Which one does oc exec choose? It might be nondeterministic (first sorted, last, random, etc.). That may lead you to connect to a pod that’s not what you intended (e.g. a “canary” or failing one).

• During rolling updates or when pods are in transition, the “selected pod” might be terminating or not the correct version.

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