When I am creating a container if I don't specify any cpu or memory resources is there a default setting that DO sets of those containers?

The default, I don’t know, but I can tell you this:

If you want to find out the resource limit / request then you can see the value by describing the deployment / pod, for example: kubectl describe deployment ping or kubectl describe pod ping. You will see something like this:

spec:
  containers:
    resources:
      limits:
        cpu: 300m
        memory: 128Mi

You can read more about resource limiting on kubernetes.io