In the set volume command, what is the resource type specified with -t?

• A. secret
• B. configmap
• C. volume
• D. mount

Answer: (B)

The key idea is that the -t option in the set volume command selects the kind of volume source you’re attaching to the resource. When you’re mounting a ConfigMap into a pod, you specify the type as configmap, so -t configmap tells the command to treat the source as a ConfigMap. This is how the data from the ConfigMap becomes available inside the container (each key becomes a file in the mounted directory). The other options like secret would indicate a different source type (a Secret) and are not the same as mounting a ConfigMap. “Volume” or “mount” aren’t resource types you pass to -t; they’re not serving as the source type for the mount. Hence, configmap is the appropriate resource type to use with -t when mounting a ConfigMap.